CN107528660A

CN107528660A - Transmit the method and SDH terminal devices of official telephone business

Info

Publication number: CN107528660A
Application number: CN201710515989.3A
Authority: CN
Inventors: 孙国新
Original assignee: Raisecom Technology Co Ltd
Current assignee: Raisecom Technology Co Ltd
Priority date: 2017-06-29
Filing date: 2017-06-29
Publication date: 2017-12-29
Anticipated expiration: 2037-06-29
Also published as: CN107528660B

Abstract

The embodiment of the invention discloses a kind of method and apparatus for transmitting official telephone business, including：Official telephone Service control board and the board electrically connected with official telephone Service control board are set in the SDH terminal devices；The link information in place of the official telephone Service control board record board electrically connected with official telephone Service control board in place；Official telephone Service control board determines input and output direction of the official telephone business for this SDH terminal devices；Current crossedpath is determined for the input and output direction of this SDH terminal devices with official telephone business according to the link information in place of the board electrically connected with official telephone Service control board recorded；When official telephone Service control board receives official telephone business, official telephone Service control board is forwarded official telephone business according to current crossedpath.The embodiment of the present invention is conversed and no longer limited by mobile network between realizing the different terminal equipment of SDH network.

Description

Method for transmitting official telephone service and SDH terminal equipment

Technical Field

The present invention relates to Synchronous Digital Hierarchy (SDH) technology, and more particularly, to a method for transmitting a public service telephone service and an SDH terminal device.

Background

The SDH technology is a synchronous digital technology based on time division multiplexing, which integrates multiplexing, line transmission, and switching functions, and for one or more networks on the upper layer, the SDH is equivalent to a transparent physical channel on which a user can develop one or more services as long as the bandwidth allows.

At present, SDH networks are widely used in a variety of broadband optical access networks, especially in a bidirectional ring network structure, and have a better application prospect due to their strong survivability (i.e., strong self-healing function) and higher reliability, and typically have increasingly been widely used in a relay network between a local network access network and a user network. However, in the areas where these SDH networks have been successfully applied, there are areas where the mobile network is uncovered or poorly covered due to geographical geography or other special reasons, and if the public telephone service can be transmitted by means of the SDH network, so as to implement the communication between different terminal devices of the SDH network, two parties at different locations can cooperate with each other without being limited by the mobile network.

Disclosure of Invention

The embodiment of the invention provides a method for transmitting official telephone service and SDH terminal equipment, which can transmit the official telephone service through an SDH network, thereby realizing the communication between different terminal equipment of the SDH network and ensuring that two parties at different positions can be matched with each other without being limited by a mobile network.

The embodiment of the invention provides a method for transmitting official telephone service, which is characterized in that the method is applied to SDH terminal equipment of a synchronous digital hierarchy SDH bidirectional ring network; the method comprises the following steps:

arranging a service telephone service control board card and a board card electrically connected with the service telephone service control board card in the SDH terminal equipment;

the business telephone service control board card records the in-place connection information of the board card which is in place in the SDH terminal equipment and is electrically connected with the business telephone service control board card;

the official telephone service control board card determines the input and output directions of the official telephone service to the SDH terminal equipment;

the business telephone service control board card determines the current cross path according to the recorded in-place connection information of the board card which is in place and electrically connected with the business telephone service control board card in the input and output directions of the business telephone service to the SDH terminal equipment;

when the official telephone service control board card receives the official telephone service, the official telephone service control board card forwards the official telephone service according to the current cross path.

Optionally, the official telephone service control board card determines that the official telephone service is received in the following manner:

the preset position overhead interface on the official telephone service control board card is electrically connected with the preset position overhead interface on the on-site board card electrically connected with the official telephone service control board card in a one-to-one correspondence manner;

and when the official telephone service control board card receives the service from the overhead interface at the preset position, determining that the official telephone service is received.

Optionally, when initiating a service telephone service request, the SDH terminal device in the bidirectional ring network determines an output direction of the service telephone service at the SDH terminal device, which specifically includes:

when the SDH terminal equipment is the SDH terminal equipment which initiates the request of the official telephone service, a connection test signaling is initiated to the east and west network sides of the ring network at the same time, and the network side which receives the earliest response aiming at the connection test signaling is taken as the output direction of the official telephone service at the SDH terminal equipment;

or, when the SDH terminal device is a SDH terminal device that receives a service telephone service request, taking a network side that receives a connection test signaling whose connection party is local at the earliest as an input direction of the service telephone service at the SDH terminal device, and making an output direction transmission response by the network side;

or, when the present SDH terminal device is not an SDH terminal device that initiates a service request for a public service telephone service, or an SDH terminal device that receives a service request for a public service telephone service, the input and output directions are determined according to the service transmission direction.

Optionally, the board card electrically connected to the official telephone service control board card is: a main group road board card;

the method further comprises the following steps: determining a current network side input SDH port and a current network side output SDH port on a main cluster board card according to the input and output directions of the official telephone service to the SDH terminal equipment;

at this time, the current cross path is: and a cross path from the overhead interface connected with the overhead interface of the main cluster board card connected with the current network side input SDH port to the overhead interface connected with the overhead interface of the main cluster board card connected with the current network side output SDH port.

Optionally, the forwarding, by the official telephone service control board card, the official telephone service according to the current cross path includes:

forwarding the official telephone service from an overhead interface connected with a network side input SDH port of the main cluster board card on the official telephone service control board to an overhead interface connected with a network side output SDH port of the main cluster board card;

the method further comprises the following steps:

when the overhead interface of the main group path board card receives the service telephone service from the service telephone service control board card, the service telephone service is forwarded to the network side output SDH port of the main group path board card, and the network side output SDH port of the main group path board card is sent to the network side.

Optionally, the board card electrically connected to the official telephone service control board card is: a main group circuit board card and a service telephone service access board card;

at this time, the current cross path is: a cross path from an overhead interface connected with an overhead interface of a public telephone service access board card to an overhead interface connected with an overhead interface of a main cluster board card connected with a current network side input SDH port; or,

and the cross path from the overhead interface connected with the overhead interface of the official telephone service access board card to the overhead interface connected with the overhead interface of the main cluster board card connected with the current network side output SDH port.

when the official telephone service control board card receives the official telephone service, the operation is as follows: when the official telephone service is input by the overhead interface of the official telephone service access board card, the official telephone service is forwarded to the overhead interface connected with the overhead interface of the main group board card connected with the network side output SDH port of the main group board card from the overhead interface connected with the overhead interface of the official telephone service access board card; or,

when the official telephone service control board card receives the official telephone service, the operation is as follows: and when the official telephone service is input through the overhead interface of the main group path board card, forwarding the official telephone service from the overhead interface connected with the overhead interface of the main group path board card to the overhead interface connected with the overhead interface of the official telephone service access board card.

Optionally, the method further includes:

the official telephone service is forwarded to an overhead interface connected with an overhead interface of a main group circuit board card connected with a network side output SDH port of the main group circuit board card from an overhead interface connected with an overhead interface of an official telephone service access board card on the official telephone service control board, then is transmitted to the network side output SDH port of the main group circuit board card through the overhead interface of the main group circuit board card, and is sent to the network side by the network side output SDH port of the main group circuit board card; or,

after the official telephone service is forwarded to the overhead interface connected with the overhead interface of the main cluster board card from the overhead interface connected with the overhead interface of the main cluster board card on the official telephone service control board, when the official telephone service access board judges that the official telephone service needs to be output locally, the official telephone service is forwarded to the telephone interface of the board card for output; and if not, forwarding the official telephone service as output to an official telephone service control board card through an overhead interface of the board card.

Optionally, the board card electrically connected to the official telephone service control board card is: the main group circuit board card and the main group circuit board card form a standby group circuit board card which protects each other,

the method further comprises the following steps: determining one of the main group road board card and the standby group road board card as a current working group road board card; determining that a network side SDH port on the main cluster circuit board card or a network side SDH port on the standby cluster circuit board card is a current network side SDH port;

determining the current network side input SDH port and the current network side output SDH port according to the input and output directions of the official telephone service to the SDH terminal equipment;

at this time, the current cross path is: and a cross path from the overhead interface connected with the overhead interface of the current workgroup road board card connected with the current network side input SDH port to the overhead interface connected with the overhead interface of the current workgroup road board card connected with the current network side output SDH port.

forwarding the official telephone service from an overhead interface connected with an overhead interface of a current working group path board card connected with a current network side input SDH port on an official telephone service control board to an overhead interface connected with an overhead interface of a current working group path board card connected with a current network side output SDH port;

the method further comprises the following steps:

when the overhead interface of the current working group circuit board card receives the official telephone service from the official telephone service control board card, the official telephone service is forwarded to the current network side output SDH port, and the current network side output SDH port is sent to the network side.

Optionally, the board card electrically connected to the official telephone service control board card is: the main group circuit board card and the main group circuit board card form a standby group circuit board card and a business telephone service access board card which are mutually protected;

at this time, the current cross path is: a cross path from the overhead interface connected with the overhead interface of the official telephone service access board card to the overhead interface connected with the overhead interface of the current workgroup road board card connected with the current network side input SDH port; or,

and the cross path from the overhead interface connected with the overhead interface of the official telephone service access board card to the overhead interface connected with the overhead interface of the current workgroup path board card connected with the current network side output SDH port.

Optionally, when the SDH terminal device is a tangent point of a circular tangent ring, the current cross path is: the method comprises the steps that an overhead interface connected with an overhead interface of a current workgroup path board card connected with a current network side input SDH port is connected with an overhead interface of the current workgroup path board card connected with a current network side output SDH port through an effective additional cross path;

the additional cross path at the point of tangency connects the two rings into a full ring path at the current network side SDH port.

when the official telephone service control board card receives the official telephone service, the operation is as follows: when the official telephone service is input by the overhead interface of the official telephone service access board card, the official telephone service is forwarded to the overhead interface connected with the overhead interface of the current working group board card connected with the current network side output SDH port from the overhead interface connected with the overhead interface of the official telephone service access board card; or,

when the official telephone service control board card receives the official telephone service, the operation is as follows: and when the official telephone service is input through the overhead interface of the current working group path board card, forwarding the official telephone service from the overhead interface connected with the overhead interface of the current working group path board card to the overhead interface connected with the overhead interface of the official telephone service access board card.

Optionally, the method further includes:

the public affair telephone business is transmitted to the overhead interface connected with the card overhead interface of the current working group circuit board connected with the current network side output SDH port from the overhead interface connected with the public affair telephone business access board on the public affair telephone business control board, then is transmitted to the current network side output SDH port through the overhead interface of the current working group circuit board, and is transmitted to the network side by the current network side output SDH port; or,

after the official telephone service is forwarded to an overhead interface connected with an overhead interface of a current working group circuit board card from an overhead interface connected with the overhead interface of the official telephone service control board and used as an output overhead interface of an official telephone service access board card, when the official telephone service access board card judges that the official telephone service needs to be output locally, the official telephone service is forwarded to a telephone interface of the board card for output; otherwise, the official telephone service is forwarded to the official telephone service control board card through the local board card as an output overhead interface.

Optionally, the forwarding, by the current workgroup path board card, the official telephone service to the current network-side output SDH port includes:

when the current working group circuit board card is a main group circuit board card and the current network side output SDH port is the SDH port of the main group circuit board card, the official telephone service is directly sent to the output SDH port of the main group circuit board card through the overhead interface of the main group circuit board card;

when the current working group path board card is a standby group path board card and the current network side output SDH port is the SDH port of the standby group path board card, the service telephone service is directly sent to the output SDH port of the standby group path board card through the overhead interface of the standby group path board card;

when the current working group circuit board card is the standby group circuit board card but the current network side output SDH port is the SDH port of the main group circuit board card, the service telephone service is sent to the output SDH port of the main group circuit board card connected with the service telephone service through the overhead interface of the standby group circuit board card;

and when the current working group circuit board card is the main group circuit board card but the current network side output SDH port is the SDH port of the standby group circuit board card, sending the official telephone service to the output SDH port of the standby group circuit board card connected with the main group circuit board card through the overhead interface of the main group circuit board card.

Optionally, the official telephone service access board card determines that the local official telephone service to be output specifically includes: the receiving and sending information included in the official telephone service is local information.

The embodiment of the invention also provides Synchronous Digital Hierarchy (SDH) terminal equipment, which comprises a service telephone service control board card for executing any one of the methods for transmitting the service telephone service and a board card electrically connected with the service telephone service control board card.

Compared with the related art, the embodiment of the invention comprises the following steps: arranging a service telephone service control board card and a board card electrically connected with the service telephone service control board card in the SDH terminal equipment; the business telephone service control board card records the in-place connection information of the board card which is in place in the SDH terminal equipment and is electrically connected with the business telephone service control board card; the official telephone service control board card determines the input and output directions of the official telephone service to the SDH terminal equipment; and when the official telephone service control board card receives the official telephone service, the official telephone service control board card forwards the official telephone service according to the current cross path. By the scheme of the embodiment of the invention, the official telephone service is transmitted through the SDH network, thereby realizing the communication between different terminal devices of the SDH network, and ensuring that two parties at different positions can be mutually matched without being limited by a mobile network.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.

Fig. 1 is a typical structure diagram of an SDH ring network according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an SDH terminal device according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a cross path when the access board card of the official telephone service is not in place and the main group board card is the current working group board card in the embodiment of the present invention;

fig. 4 is a schematic diagram of a cross path when the access board card of the official telephone service is not in place and the standby group board card is the current working group board card in the embodiment of the present invention;

fig. 5 is a schematic diagram of a cross path when the access board card of the official telephone service is in place and the main group board card is the current working group board card in the embodiment of the present invention;

fig. 6 is a schematic diagram of a cross path when the access board card of the official telephone service is in place and the standby group board card is the current working group board card in the embodiment of the present invention;

FIG. 7 is a flowchart of a method for transmitting official telephone traffic in accordance with an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a first ring networking scenario according to an embodiment of the present invention;

fig. 9 is a schematic structural composition diagram of a second ring networking scenario according to the embodiment of the present invention;

fig. 10 is a schematic structural composition diagram of a ring networking scene three according to the embodiment of the present invention;

fig. 11 is a schematic structural composition diagram of a ring networking scene four according to the embodiment of the present invention;

fig. 12 is a schematic structural composition diagram of a ring networking scenario five according to an embodiment of the present invention.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

The embodiment of the invention provides a method for transmitting a public service telephone service in an SDH bidirectional ring network, and for convenience of description, the SDH bidirectional ring network is briefly described.

An SDH ring network is typically shown in fig. 1, and includes: if the terminal device a and the terminal device C communicate with each other, the service route from the terminal device a to the terminal device C is assumed to be a → B → C, and the service route from the terminal device C to the terminal device a is also C → B → a at this time, that is, the routes of the services between the two terminal devices are the same, which is called a consistent route, and when each terminal device in the SDH network is a consistent route, the network is an SDH bidirectional ring network.

The SDH terminal device according to the embodiment of the present invention is a terminal device of any node in the above SDH bidirectional ring network, and includes: the system comprises a service telephone service access board card, a main group path board card, a standby group path board card and a service telephone service control board card. The backup group path board card and the service access board card are optional board cards, that is, for an SDH terminal device, only the service control board card and the main group path board card may be included. The following takes all the above-mentioned types of boards involved in transmitting the public service telephone service (but not involving boards for transmitting other services in SDH) as an example to illustrate the specific components of an SDH terminal device, as shown in fig. 2:

the service telephone access board card is provided with a telephone interface for the input and output of service telephone services (including voice services and signaling services) and one or more overhead interfaces which are in one-to-one corresponding connection with the overhead interfaces at preset positions on the service telephone service control board card;

the main group circuit board card is provided with one or more SDH ports for realizing data transmission with an external SDH network and one or more overhead interfaces which are connected with the overhead interfaces at the preset positions on the official telephone service control board card in a one-to-one correspondence manner; each SDH port is correspondingly connected to the overhead interface at the preset position of the board card one by one, and is correspondingly connected to the overhead interface at the preset position of the standby group circuit board card one by one;

the backup group circuit board card is a board card which forms mutual protection with the main group circuit board card, has the same design as the main group circuit board card, and is provided with one or more SDH ports for realizing data transmission with an external SDH network and one or more overhead interfaces which are in one-to-one corresponding connection with the overhead interfaces at preset positions on the official telephone service control board card; each SDH port is correspondingly connected to the overhead interface at the preset position of the board card one by one, and is correspondingly connected to the overhead interface at the preset position of the main group of board cards one by one;

for the main group circuit board card and the standby group circuit board card, it is described that: the main group road board card and the standby group road board card can only determine one of the main group road board card and the standby group road board card as a current working group road board card according to the working state of the board cards; each overhead interface at a preset position on the main group path board card and the standby group path board card is only connected with one SDH port; each SDH port is simultaneously connected with an overhead interface on the main group circuit board card and an overhead interface on the standby group circuit board card; for example, as shown in fig. 2, an SDH port 1 of a main group of board cards is correspondingly connected to an overhead interface 1 of the main group of board cards and an overhead interface 3 of a standby group of board cards, an SDH port 2 of the main group of board cards is correspondingly connected to an overhead interface 2 of the main group of board cards and an overhead interface 4 of the standby group of board cards, an SDH port 1 of the standby group of board cards is correspondingly connected to the overhead interface 3 of the main group of board cards and the overhead interface 1 of the standby group of board cards, and an SDH port 2 of the standby group of board cards is correspondingly connected to the overhead interface 4 of the main group of board cards and the overhead interface 2 of the standby group of board cards. For the SDH terminal equipment connected to the ring network, determining whether the current network side SDH port is located on a main cluster board card or a standby cluster board card according to the current SDH port connected to the SDH ring network, and determining which set overhead interfaces on the business telephone service control board card are effective overhead interfaces of the current cross path according to whether the current working cluster board card is the main cluster board card or the standby cluster board card; namely: the SDH port connected into the SDH ring network is the current network side SDH port, no matter the port is positioned on the main group circuit board card or the standby group circuit board card; and the overhead interface which is connected with the overhead interface of the current working group circuit board card on the service telephone service control board card is set as the effective overhead interface of the current cross path, so that although the overhead interfaces of the main group circuit board card and the standby group circuit board card can simultaneously receive the service telephone service input by the SDH port of the current network side, the service telephone service control board card can still select one of the service telephone service control board card for forwarding.

The business telephone service control board card completes the mutual transmission of the business telephone service among the business telephone service access board card, the main group circuit board card and the standby group circuit board card, and is electrically connected with the main group circuit board card, the standby group circuit board card and the business telephone service access board card, and each overhead interface at the preset position on the business telephone service control board card corresponds to the overhead interfaces on other board cards one by one, namely: the overhead interfaces at the preset positions on the card can be pre-configured to be connected with the overhead interfaces on each other card through an overhead bus, and cross connection of the overhead interfaces on other cards can be realized according to needs, so that flexible forwarding of data between each crossed overhead interface is realized.

One point is explained: in the SDH terminal device proposed in the embodiment of the present invention, how the official telephone service access board encapsulates the voice service and the signaling service into the overhead interface, and the overhead extraction and insertion methods between the overhead interfaces of the main group board card and the standby group board card and the SDH port can be implemented by any means in the prior art, but the embodiment of the present invention is not limited thereto, and the connection between each overhead interface and the SDH port or the telephone interface in the embodiment of the present invention includes the above-mentioned data processing procedure, which is directly expressed as "connection" for the sake of simpler description; in addition, the in-place connection information between each board and the business telephone service control board can be obtained on the side of the business telephone service control board by using a method known by a person skilled in the art. To more clearly describe how the cross-connection of the overhead interfaces on the other boards is implemented in the above-mentioned official telephone service control board, a 12 × 12 official telephone service cross-connection is implemented in the official telephone service control board, and the official telephone service cross-connection is exemplarily illustrated as follows according to the granularity of a 4-byte signaling channel:

in the official telephone service control board card, overhead interfaces are respectively allocated to the main group board card, the standby group board card and the official telephone service access board card according to 12 × 4 byte signaling channels, and the specific allocation result can be shown in fig. 2, where overhead interface 1-overhead interface 4 on the official telephone service control board card are used for correspondingly connecting the overhead interfaces of the official telephone service access board cards to form a signaling channel, overhead interface 5-overhead interface 8 are used for correspondingly connecting the overhead interfaces of the main group board card to form a signaling channel, and overhead interface 9-overhead interface 12 are used for correspondingly connecting the overhead interfaces of the standby group board cards to form a signaling channel, that is, the official telephone service access board card, the main group board card and the standby group board card respectively occupy 4 signaling channels, and in the implementation process, each board card can correspondingly acquire the signaling channel allocated to the slot position through the actually occupied signaling channel (that is, an overhead interface). Optionally, the main group road board card and the standby group road board card may occupy the fixed slot position; the slot positions occupied by the service telephone access board card can be changed, but the slot positions predetermined by the main group board card, the standby group board card and the service telephone service control board card are not occupied, so that networking is conveniently carried out by taking the group board card as the networking basis. Further, as long as the main group circuit board card, the standby group circuit board card or the official telephone service control board card are installed in place, the connection relationship between the overhead interfaces of the respective overhead interfaces and the overhead interfaces of the different board cards can be automatically obtained according to the slot positions and stored in the official telephone service control board card.

In the official telephone service control board, according to different scene requirements, different cross-connections may form different cross-paths, for example, when the official telephone service access board is out of place and the main group board is the current working group board, the cross-path for information transmission formed in the official telephone service control board may be as shown in fig. 3; when the standby group circuit board card is the current working group circuit board card, the cross path for information transmission formed in the official telephone service control board card can be as shown in fig. 4; in the case that the business telephone service access board is in place, when the main group board is the current working group board, the cross path for information interaction formed in the business telephone service control board may be as shown in fig. 5; when the standby group circuit board card is the current working group circuit board card, the cross path for information interaction formed in the business telephone service control board card may be as shown in fig. 6. Other cross paths may be similarly generated depending on the needs of the scenario.

Referring to fig. 7, a method for transmitting the public service telephone service in the SDH bidirectional ring network by the above SDH terminal equipment will be described in detail below, where the method includes:

step 100: and the business telephone service control board card records the in-place information of the board card which is in place in the SDH terminal equipment and is electrically connected with the business telephone service control board card.

Optionally, when the service telephone service control board card does not know the board card information included in the SDH terminal device to which the service telephone service control board card belongs, step 100 includes:

step 1001: the official telephone service control board card judges whether the main group circuit board card is in place, if not, the main group circuit board card is out of the discussed range of the embodiment of the invention, which is not described herein, if in place, the in-place connection information of the main group circuit board card is recorded, namely the position information of the overhead interface of the main group circuit board card connected on the official telephone service control board card is recorded, and then step 1002 is executed;

step 1002: the official telephone service control board card judges whether the standby group circuit board card is in place, if not, the main group circuit board card is directly determined as the current working group circuit board card, and the step 1003 is directly executed; if the standby group circuit board card is in place, recording in-place connection information of the standby group circuit board card, namely recording position information of an overhead interface connected with the standby group circuit board card on the official telephone service control board card, determining a current working group circuit board card according to the current states of the main group circuit board card and the standby group circuit board card, and then executing step 1003;

in this step, determining that the currently operating group of the circuit boards may be according to the current states of the main group of the circuit boards and the standby group of the circuit boards: when the main group of the circuit boards are in a normal state, determining the main group of the circuit boards as the current working group of the circuit boards; when the main group of the circuit boards are in an abnormal state and the standby group of the circuit boards are in a normal state, determining the standby group of the circuit boards as the current working group of the circuit boards; of course, the determination may be made in other predetermined manners;

step 1003: the business telephone service control board card judges whether the business telephone service access board card is in place, if not, the SDH terminal equipment can not be directly used as a calling party of the business telephone service, but can be used as a middle node for transmitting the business telephone service; if the SDH terminal equipment is in place, the SDH terminal equipment can directly carry out input or output of the official telephone service (including voice service and signaling service), namely, the SDH terminal equipment is used as a calling party of the official telephone, and in-place connection information of the official telephone service access board card in place is recorded, namely, position information of an overhead interface connected with the official telephone service control board card is recorded.

Optionally, when the business telephone service control board card knows the board card information included in the SDH terminal device to which the business telephone service control board card belongs, the step 1002 and the step 1003 are optional execution steps, and when the backup group board card is likely to be in place, the step 1002 needs to be executed; when the backup group circuit board card cannot be in place, the step 1002 does not need to be executed; when the access card for the service of the public service telephone is likely to be in place, step 1003 is executed; when the official telephone service access board is not available, step 1003 need not be executed.

Therefore, all board information of the SDH terminal device can be recorded in the service telephony service control board through the above-mentioned step 1001 and 1003. Supplementary description of the above steps is as follows: the above steps 1001,1002, and 1003 are only exemplary, the service telephone service control board determines that there is no strict execution sequence for the in-place connection information of each board, as long as the current in-place connection information of the service telephone service control board, which can record the main group board, the standby group board, and the service telephone service access board of the SDH terminal device, i.e. the overhead interface position information connected to each board, is recorded, and whether each board is in place or not can be implemented by any means in the prior art, for example: the official telephone service control board card is regularly patrolled according to the slot position to obtain the position connection information of each board card; or the service telephone service control panel card receives the on-position signal automatically sent after the service telephone service access panel card is on position.

The board card electrically connected to the official telephone service control board card in place determined by the step 100 includes:

a main group road board card;

or the main group circuit board card and the standby group circuit board card;

or, the main group circuit board card and the official telephone service access board card;

or the main group circuit board card, the standby group circuit board card and the official telephone service access board card.

Step 101: the official telephone service control board card determines an optional cross path for transmission of the official telephone service according to the recorded in-place connection information of the board card which is in place and electrically connected with the official telephone service control board card; specifically, the method comprises the following steps:

when there is a service telephone access board, the selectable cross path for service telephone transmission includes: (1) a cross path from an overhead interface on the official telephone service control board card connected with the overhead interface of the official telephone service access board card to an overhead interface on the official telephone service control board card connected with the overhead interface of the current workgroup board card connected with an SDH port on the current network side; or (2) a cross path from an overhead interface connected with an overhead interface of the official telephone service access board card on the official telephone service control board card to an overhead interface connected with an overhead interface of a current working group board card connected with an SDH port of another current network side on the official telephone service control board card;

when there is no access board for the official telephone service, the selectable cross path for the transmission of the official telephone service includes: a cross path from an overhead interface of the current working group path board card connected with the SDH port of one current network side on the official telephone service control board card to an overhead interface of the current working group path board card connected with the SDH port of the other current network side on the official telephone service control board card;

for any SDH terminal device, the east and west directions thereof respectively correspond to two current network sides, and depending on different application scenarios, the SDH port on the network side may be an SDH port on a main group path board card and/or an SDH port on a standby group path board card.

Step 102: the official telephone service control board card determines the input and output directions of the official telephone service to the SDH terminal equipment; in particular, the amount of the solvent to be used,

(1) the input and output directions of the official telephone service in the SDH terminal equipment can be determined according to the pre-configured network side transmission direction; or,

(2) the input and output directions of the official telephone service at the SDH terminal device can be determined when the SDH terminal device in the SDH ring network initiates an official telephone service request;

typically, when there is a request for a service telephone service initiated by an SDH terminal device in an SDH ring network, determining the input and output directions of the service telephone service at the SDH terminal device includes:

when the SDH terminal equipment is the SDH terminal equipment which initiates the request of the official business telephone service, a connection test signaling (for example, 55 signaling generated by off-hook can be used) is initiated to two network sides of a ring network at the same time, and the network side which receives the earliest response (for example, A5 signaling) aiming at the connection test signaling is taken as the output direction of the official business telephone service at the SDH terminal equipment; when the present SDH terminal device initiates connection test signaling to the east and west network sides of the ring network, two selectable cross paths from the overhead interface connected to the overhead interface of the business telephone service access board on the business telephone service control board to the overhead interface connected to the overhead interface of the current workgroup path board connected to the SDH ports of the two current network sides, which are determined in step 101, are provided inside the SDH terminal device;

or, when the present SDH terminal device is an SDH terminal device that receives a service telephone service request, the network side that receives the connection test signaling whose connection party is local at the earliest is taken as the input direction of the service telephone service at the present SDH terminal device, and a response is sent from the network side; the connecting party is locally determined according to the destination address of the connection test signaling, and the inside of the SDH terminal device passes through two crossed paths from the overhead interface connected with the overhead interface of the service access board on the service telephone service control board to the overhead interface connected with the overhead interfaces of the current workgroup path boards connected with the SDH ports of the two current network sides, which are determined in step 101, so that the connection test signaling transmitted from the two current network transmission sides to the SDH terminal device can reach the telephone service access board, and the connection test signaling is judged whether the connecting party is local or not and is received at the earliest;

or, when the SDH terminal device is not the SDH terminal device initiating the official business telephone service request and is not the SDH terminal device receiving the official business telephone service request, the two sides of the network are both transmission sides of the official business telephone service, and the input and output directions are determined according to the service transmission direction; only determining an optional path for forwarding according to step 101, wherein the SDH terminal device internally passes through the optional cross path determined in step 101; the SDH terminal device not initiating the SDH terminal device of the official business telephone service request, and not receiving the SDH terminal device of the official business telephone service request can judge under the following two conditions: (i) when the service telephone access board card does not exist in the SDH terminal device, and (ii) when the service telephone access board card exists in the SDH terminal device, the destination addresses according to the received connection test signaling and the response instruction are determined according to non-local addresses.

It is further supplementary to this step that: when the ring network where the SDH terminal device is located is a ring-cutting ring, the ring-cutting point is firstly acted with an additional cross path to connect two rings into a whole ring at the current network side SDH port, and then the input and output directions of the official telephone service to the SDH terminal device are determined according to the above mode.

Whether the ring network where the SDH terminal device is located is a ring switching ring can be known through pre-configuration, and can also be determined when the official telephone service control board card judges that 2 pairs of effective network side input and output ports exist at the ring switching point. The specific determination method can also be selected by those skilled in the art according to the needs of the scene.

Step 103: and the official telephone service control board card determines the current cross path according to the selectable cross path and the input and output directions of the official telephone service to the SDH terminal equipment.

In this step, the business telephone service control board card receives business telephone services including (1) business telephone services input by the overhead interface of the business telephone service access board card; and (2) the official telephone service input through the overhead interface of the current working group circuit board card, and the current cross path aiming at the two conditions is as follows:

(1) when the official telephone service control panel card receives the official telephone service, the method comprises the following steps: when the official telephone service is input by the overhead interface of the official telephone service access board card, the current cross path is as follows: a cross path from an overhead interface connected with an overhead interface of a public telephone service access board card to an overhead interface connected with an overhead interface of a current workgroup path board card connected with an output SDH port of a current network side; when the SDH terminal device is a tangent point of a circular tangent ring, the current cross path is: the cross path from the overhead interface connected with the overhead interface of the official telephone service access board card to the overhead interface connected with the overhead interface of the current workgroup board card connected with the output SDH port of the current network side via the effective additional cross path;

(2) when the official telephone service control board card receives the official telephone service, the operation is as follows: when the official telephone service is input by the overhead interface of the current working group circuit board card connected with the current network side output SDH port,

if the official telephone service access board card exists, the current cross path comprises the following steps: a cross path from an overhead interface connected with an overhead interface of a current working group circuit board card connected with a current network side SDH port to an overhead interface connected with an overhead interface as an output of a service telephone service access board card on a service telephone service control board card; if the SDH terminal equipment is the tangent point of the circular cutting ring, the current cross path is as follows: and the overhead interface connected with the overhead interface of the current workgroup circuit board card connected with the current network side input SDH port is connected with a cross path between the overhead interfaces connected with the overhead interface as the output of the official telephone service access board card on the official telephone service control board card through the effective additional path.

If the official telephone service access board card does not exist, the current cross path comprises the following steps: a cross path from the overhead interface connected with the overhead interface of the current workgroup road board card connected with the input SDH port of the current network side to the overhead interface connected with the overhead interface of the current workgroup road board card connected with the output SDH port of the current network side; if the SDH terminal equipment is the tangent point of the circular cutting ring, the current cross path is as follows: and the overhead interface connected with the overhead interface of the current workgroup road board card connected with the input SDH port of the current network side is connected with the cross path between the overhead interface connected with the overhead interface of the current workgroup road board card connected with the output SDH port of the current network side through the effective additional path.

And step 104, when the official telephone service control board card receives the official telephone service, the official telephone service control board card forwards the official telephone service according to the current cross path.

In this step, when the official telephone service control board card receives a service from the overhead interface at the predetermined location, it is determined that the received service is the official telephone service.

In this step, the official telephone service control board transmits the official telephone service according to the determined current cross path, specifically:

when the fact that the official telephone service is input from the overhead interface of the official telephone service access board card is determined according to the overhead interface information of the received official telephone service, transmitting the official telephone service according to the determined current cross path comprises the following steps: and forwarding the official telephone service from the overhead interface connected with the overhead interface of the official telephone service access board card to the overhead interface connected with the current network side output SDH port according to the determined current cross path.

When the overhead interface of the current working group circuit board connected with the current network side output SDH port receives the official telephone service from the official telephone service control board, the current working group circuit board forwards the official telephone service to the current network side output SDH port through the overhead interface of the current working group circuit board connected with the current network side output SDH port, and the current network side output SDH port sends the official telephone service to the network side;

the current workgroup path board card forwards the official telephone service to the current network side output SDH port from the overhead interface of the current workgroup path board card connected with the current network side output SDH port comprises the following steps:

when the current working group circuit board card is the main group circuit board card and the current network side output SDH port is the SDH port of the main group circuit board card, the official telephone service is directly sent to the output SDH port of the main group circuit board card through the overhead interface of the main group circuit board card;

when the current working group circuit board card is a standby group circuit board card and the current network side output SDH port is the SDH port of a main group circuit board card, transmitting the official telephone service to the output SDH port of the main group circuit board card which is in board protection connection with the standby group circuit board card through the overhead interface of the standby group circuit board card;

when the current working group circuit board card is the standby group circuit board card and the current network side output SDH port is the SDH port of the standby group circuit board card, the official telephone service is directly sent to the output SDH port of the standby group circuit board card through the overhead interface of the standby group circuit board card;

when the current working group circuit board card is the main group circuit board card but the current network side output SDH port is the SDH port of the standby group circuit board card, the official telephone service is sent to the output SDH port of the standby group circuit board card which is in board protection connection with the main group circuit board card through the overhead interface of the main group circuit board card.

When the official telephone service is determined to be the official telephone service input by the overhead interface of the current working group circuit board card connected with the current network side output SDH port according to the overhead interface information of the received official telephone service, the transmission of the official telephone service according to the determined current cross path comprises the following steps: if the official telephone service access board card exists, forwarding the official telephone service from an overhead interface connected with an overhead interface of a current working group board card connected with a current network side input SDH port to an overhead interface connected with the output overhead interface of the official telephone service access board card according to a current cross path, judging whether the official telephone service is locally required to be output by the official telephone service access board card, and if so, forwarding the official telephone service to a telephone interface of the board card and outputting the official telephone service by the telephone interface; if not, the official telephone service is forwarded to the official telephone service control board card through the overhead interface which is used as the output of the board card, and the official telephone service control board card inputs the official telephone service as the overhead interface of the official telephone service access board card to re-determine the current cross path.

The method for judging whether the official telephone service access board card is the official telephone service which needs to be locally output comprises the following steps:

the official telephone service includes explicit information of the receiving party, and determines whether the receiving party is locally received according to the information of the receiving party, and this process may be determined by any manner known to those skilled in the art, and will not be described herein again.

For the method for performing the service transmission in the SDH terminal equipment, it needs to be additionally described that:

(1) the in-place information of the board card electrically connected with the business telephone service control board card in the SDH terminal equipment recorded in the business telephone service control board card is updated when the state change of each board card is known (whether the board card is in place or whether main/standby switching is needed, etc.);

(2) for the transmission of the official telephone service, the cross transmission can be carried out when the official telephone service control board card judges that the official telephone transparent transmission is enabled, otherwise, the cross transmission is forbidden;

(3) the official telephone service control board card considers that the official telephone service is received when receiving data from an overhead interface at a preset position;

(4) in the above embodiment, the current cross path is determined from the alternative cross paths, where the alternative cross paths are different cross paths that may exist in the ring network for the different input and output directions of the device in the business telephone service; actually, if the business telephone service is known to the input and output directions of the SDH terminal device or determined, the current cross path is uniquely determined, and in other embodiments, the current cross path may be determined directly without determining an optional cross path and then determining the current cross path; however, if the input and output directions of the official telephone service to the SDH terminal device need to be determined by initiating the test signaling, the test signaling needs to pass through alternative cross paths respectively when the transmission direction of the official telephone service is unknown.

The transmission method of the public service telephone service in the SDH bidirectional ring network proposed by the present invention is described in more detail in the following application scenarios.

(1) A first ring networking scene: (each SDH terminal device has no backup group circuit board card, and the SDH terminal device as the middle node is not provided with a service telephone service access board card)

Referring to fig. 8, in the application scenario of the above ring-shaped networking, the SDH terminal device 1, SDH terminal device 2, and SDH terminal device 3 are three SDH terminal devices proposed in the embodiment of the present invention, and the SDH terminal device 1 and SDH terminal device 3 include: the service telephone service control board, the service telephone service access board and the main group board, and the SDH terminal device 2 includes: the official telephone service control board card and the main group board card do not comprise the official service access board card; the SDH terminal equipment 1, the SDH terminal equipment 2 and the SDH terminal equipment 3 are connected by optical fiber rings through respective SDH ports;

after the SDH terminal device 1, the SDH terminal device 2, and the SDH terminal device 3 are started, the respective official telephone service control board cards determine the following information of the SDH terminal devices to which they belong:

(i) the main group circuit board is in place and records corresponding position information of a local board overhead interface connected with the main group circuit board;

and the official telephone service control board cards of the SDH terminal equipment 1 and the SDH terminal equipment 3 also determine the following information of the SDH terminal equipment:

(ii) the official telephone service access board is in place and records the corresponding position information of the local board overhead interface connected with the official telephone service access board;

the official telephone service control board card of each SDH terminal device can determine and locally store an optional cross path for official telephone service transmission according to the determined position information of different board cards connected to the overhead interface of the board:

(i) SDH terminal apparatus 1: a cross path from an overhead interface of the official telephone service access board card connected with a telephone interface of the official telephone service access board card to an overhead interface of a main cluster board card connected with an SDH port (for example, SDH port 1) on one network side, and a cross path from the overhead interface of the official telephone service access board card connected with the telephone interface of the official telephone service access board card to an overhead interface of the main cluster board card connected with an SDH port (for example, SDH port 2) on the other network side, wherein the SDH port on one network side and the SDH port on the other network side are respectively SDH ports in east-west and-west directions of a ring network;

(ii) SDH terminal apparatus 2: a cross path from the overhead interface of the main cluster board card connected with one network side SDH port to the overhead interface of the main cluster board card connected with the other network side SDH port;

(iii) SDH terminal apparatus 3: a cross path from an overhead interface of the official telephone service access board card connected with a telephone interface of the official telephone service access board card to an overhead interface of a main cluster board card connected with an SDH port of one network side, and a cross path from the overhead interface of the official telephone service access board card connected with the telephone interface of the official telephone service access board card to an overhead interface of the main cluster board card connected with an SDH port of the other network side, wherein the SDH port of one network side and the SDH port of the other network side are respectively SDH ports of the looped network in east-west and-west directions;

when a official business telephone service transmission is required between the SDH terminal device 1 and SDH terminal device 3, the SDH terminal device 1, SDH terminal device 2, and SDH terminal device 3 respectively determine the current network side transmission direction of the respective official business telephone service (for example, SDH terminal device 1 ← → SDH terminal device 2 ← → SDH terminal device 3); the following steps are then performed:

when the SDH terminal device 1 packages the official telephone service (signaling service and voice service) received by the telephone interface of the official telephone service access board card according to a predetermined format and sends the service to the overhead interface of the board card; the official telephone service control board card receives the official telephone service from the corresponding overhead interface, and transmits the official telephone service to the overhead interface of the main group board card connected with the output SDH port (namely SDH port 2) of the main group board card after determining the current cross path according to the locally stored selectable cross path and the current network side transmission direction; then, the output SDH port (namely SDH port 2) of the main group path board card is output to the determined network side;

when an input SDH port (namely an SDH port 1) of a main cluster board card of an SDH terminal device 2 receives data from a network side, the data is transmitted to an overhead interface of the main cluster board card, a service telephone service control board receives the data from the corresponding overhead interface and judges that the received data is service telephone service, the service telephone service is transmitted to the overhead interface connected with an output SDH port 2 of the main cluster board card in a cross way according to a locally stored optional cross path, and the service telephone service is output to the network side through the output SDH port (namely the SDH port 2) of the main cluster board card;

when an input SDH port (that is, SDH port 2) of a main group circuit board of SDH terminal equipment 3 receives data from a network side, it transmits it to an overhead interface of the main group circuit board, and after the official telephone service control board receives the data from the corresponding overhead interface and determines that the received data is official telephone service data, it determines a current cross path according to a locally stored selectable cross path and a current network side transmission direction, and then cross-transmits the official telephone service to the overhead interface connected to the official telephone service access board, and finally outputs it by the official telephone service access board.

Thereby completing the transmission of the official telephone traffic from the SDH terminal apparatus 1 to the SDH terminal apparatus 3. Correspondingly, the transmission method of the official telephone traffic from the SDH terminal apparatus 3 to the SDH terminal apparatus 1 is similar to the above, only in the opposite direction.

(2) And a second ring networking scene: (each SDH terminal device is provided with a backup cluster path board card, the SDH ports of the current network side are the SDH ports of the main cluster path board card, and the SDH terminal device as the intermediate node is not provided with a service telephone service access board card)

Referring to fig. 9, in the above-mentioned application scenario of ring networking, the SDH terminal device 1, SDH terminal device 2, and SDH terminal device 3 are three SDH terminal devices proposed in the embodiment of the present invention, and the SDH terminal device 1 and SDH terminal device 3 both include: the system comprises a business telephone service control board card, a business telephone service access board card, a main group board card and a standby group board card; and the SDH terminal apparatus 2 includes: the official telephone service control board card, the main group board card and the standby group board card, but do not include: the official telephone service access board card; the SDH terminal equipment 1, the SDH terminal equipment 2 and the SDH terminal equipment 3 are connected by optical fiber rings through respective SDH ports;

(ii) the standby group path board card is in place and records corresponding local board overhead interface position information connected with the standby group path board card;

(iii) the official telephone service access board is in place and records the corresponding position information of the local board overhead interface connected with the official telephone service access board;

the official telephone service control board card of each SDH terminal device can determine and locally store an optional cross path for transmission of the official telephone service according to the determined position information of different board cards connected to the overhead interface of the board and the state of the board card of the current workgroup:

(i) SDH terminal apparatus 1: a cross path from an overhead interface of the official telephone service access board card connected with a telephone interface of the official telephone service access board card to an overhead interface of a current working group board card connected with an SDH port on one network side of the main group board card, and a cross path from the overhead interface of the official telephone service access board card connected with the telephone interface of the official telephone service access board card to an overhead interface of the current working group board card connected with an SDH port on the other network side of the main group board card, wherein the SDH port on one network side and the SDH port on the other network side are respectively SDH ports in east-west and-west directions of a ring network;

(ii) SDH terminal apparatus 2: a cross path from the overhead interface of the current working group circuit board card connected with one network side SDH port of the main group circuit board card to the overhead interface of the current working group circuit board card connected with the other network side SDH port of the main group circuit board card;

(iii) SDH terminal apparatus 3: a cross path from an overhead interface of the official telephone service access board card connected with a telephone interface of the official telephone service access board card to an overhead interface of a current working group board card connected with an SDH port on one network side of the main group board card, and a cross path from the overhead interface of the official telephone service access board card connected with the telephone interface of the official telephone service access board card to an overhead interface of the current working group board card connected with an SDH port on the other network side of the main group board card, wherein the SDH port on one network side and the SDH port on the other network side are respectively SDH ports in east-west and-west directions of a ring network;

one point is explained: the method can determine a certain board card as the current working group board card according to the working states of the main group board card and the standby group board card.

when the SDH terminal device 1 packages the official telephone service (signaling service and voice service) received by the telephone interface of the official telephone service access board card according to a predetermined format and sends the service to the overhead interface of the board card; the official telephone service control board card receives the official telephone service from the corresponding overhead interface, and transmits the official telephone service to the overhead interface of the current working group board card connected with the output SDH port (namely SDH port 2) of the main group board card after determining the current cross path according to the locally stored selectable cross path and the current network side transmission direction; then the main cluster board card outputs an SDH port (namely an SDH port 2) to the determined network side; specifically, the transmission of the overhead interface of the current working group circuit board card to the output SDH port of the main group circuit board card may be: if the current working group circuit board card is the main group circuit board card, the business telephone service is directly transmitted to the SDH port of the main group circuit board card through the overhead interface of the main group circuit board card, and if the current working group circuit board card is the standby group circuit board card, the business telephone service information is transmitted to the SDH port of the main group circuit board card connected with the business telephone service information through the overhead interface of the standby group circuit board card; and the current working group circuit board card can be determined by the official telephone service control board card according to the current states of the main group circuit board card and the standby group circuit board card.

When a main group board card input SDH port (namely SDH port 1) of SDH terminal equipment 2 receives data from a network side, the data is transmitted to an overhead interface of a current working group board card, a service telephone service control board card receives the data from a corresponding overhead interface and judges that the received data is service telephone service, the service telephone service is transmitted to the overhead interface of the current working group board card connected with the main group board card output SDH port (namely SDH port 2) in a cross mode according to a locally stored cross path, and the service telephone service is output to the network side through the output SDH port;

when a main group circuit board card of the SDH terminal device 3 inputs data from a network side to an SDH port (that is, SDH port 2), the data is simultaneously transmitted to overhead interfaces of the main group circuit board card and the standby group circuit board card, and after the business telephone service control board receives the data from the overhead interface corresponding to the current working group circuit board card and determines that the received data is business telephone service, the current cross path is determined according to a locally stored selectable cross path and the current network side transmission direction, and the business telephone service access board finally outputs the data.

The transmission of the official telephone traffic from the SDH terminal device 1 to the SDH terminal device 3 is thus completed, and correspondingly, the transmission of the official telephone traffic from the SDH terminal device 3 to the SDH terminal device 1 is similar to the above, but in the opposite direction.

Compared with the ring networking scenario I, the scenario has the advantages that the standby group circuit board card is added in the SDH terminal equipment, and the connection structure of the external network (namely the SDH port connected with the external network side) is not changed when one of the main group circuit board card and the standby group circuit board card is selected as the current working state according to the working states of the main group circuit board card and the standby group circuit board card, so that the transmission of the official telephone service in the SDH network can be realized.

(3) A third ring networking scene: (each SDH terminal device has no backup group circuit board card, but all SDH terminal devices have service telephone service access board cards)

Referring to fig. 10, in the application scenario of the above ring-shaped networking, the SDH terminal device 1, SDH terminal device 2, and SDH terminal device 3 are three SDH terminal devices proposed in the embodiment of the present invention, and each SDH terminal device includes: the system comprises a business telephone service control board card, a business telephone service access board card and a main group circuit board card; the SDH terminal equipment 1, the SDH terminal equipment 2 and the SDH terminal equipment 3 are connected by optical fiber rings through respective SDH ports;

(i) SDH terminal apparatus 1: a cross path from an overhead interface of the official telephone service access board card connected with a telephone interface of the official telephone service access board card to an overhead interface of a main cluster board card connected with a network side SDH port, and a cross path from the overhead interface of the official telephone service access board card connected with the telephone interface of the official telephone service access board card to an overhead interface of the main cluster board card connected with another network side SDH port, wherein the SDH port of one network side and the SDH port of the other network side are respectively SDH ports of the looped network in east-west and west directions;

(ii) SDH terminal apparatus 2: a cross path from an overhead interface of the official telephone service access board card connected with a telephone interface of the official telephone service access board card to an overhead interface of a main cluster board card connected with a network side SDH port, and a cross path from the overhead interface of the official telephone service access board card connected with the telephone interface of the official telephone service access board card to an overhead interface of the main cluster board card connected with another network side SDH port, wherein the SDH port of one network side and the SDH port of the other network side are respectively SDH ports of the looped network in east-west and west directions;

(iii) SDH terminal apparatus 3: a cross path from an overhead interface of the official telephone service access board card connected with a telephone interface of the official telephone service access board card to an overhead interface of a main cluster board card connected with a network side SDH port, and a cross path from the overhead interface of the official telephone service access board card connected with the telephone interface of the official telephone service access board card to an overhead interface of the main cluster board card connected with another network side SDH port, wherein the SDH port of one network side and the SDH port of the other network side are respectively SDH ports of the looped network in east-west and west directions;

when a official business telephone service transmission needs to be performed between the SDH terminal device 1 and SDH terminal device 3, the SDH terminal device 1, SDH terminal device 2, and SDH terminal device 3 respectively determine the transmission paths of the official business telephone service on the respective network sides (for example, SDH terminal device 1 ← → SDH terminal device 2 ← → SDH terminal device 3); the following steps are then performed:

when the SDH terminal device 1 packages the official telephone service (signaling service and voice service) received by the telephone interface of the official telephone service access board card according to a predetermined format and sends the service to the overhead interface of the board card; the official telephone service control board card receives the official telephone service from the corresponding overhead interface, and transmits the official telephone service to the overhead interface of the main cluster board card connected with the network side output SDH port (namely SDH port 2) of the main cluster board card after determining the current cross path according to the locally stored selectable cross path and the current network side transmission direction; then, the output SDH port of the main group path board card is output to the determined network side;

when an input SDH port (namely SDH port 1) of a main cluster circuit board card of SDH terminal equipment 2 receives data from a network side, the data is transmitted to an overhead interface of the main cluster circuit board card, a service telephone service control board card determines a current cross path according to a locally stored optional cross path and the current network side transmission direction after receiving the data from a corresponding overhead interface, then cross-transmits service telephone service to the overhead interface connected with a service telephone service access board card, the service telephone service access board card judges that the service telephone service input by the overhead interface is not the service telephone service which needs to be output locally, then returns the service telephone service to the service telephone service control board card through the local overhead interface, the service telephone service control board cross-transmits the service to the overhead interface connected with an output SDH port (namely SDH port 2) of the main cluster circuit board card after determining the current cross path according to the optional cross path and the current network side transmission direction, outputting the SDH data to the network side through the output SDH port;

when an input SDH port (that is, SDH port 2) of a main group circuit board of SDH terminal apparatus 3 receives data from a network side, it transmits the data to an overhead interface of the main group circuit board, and after the official telephone service control board receives the data from the corresponding overhead interface and determines that the received data is an official telephone service, it cross-transmits the official telephone service to the overhead interface connected to the official telephone service access board after determining the current cross path according to the locally stored selectable cross path and the current network side transmission direction, and the official telephone service access board determines that the official telephone service that needs to be locally output is output.

Compared with the first ring networking scene, the service telephone service access board cards are arranged in the SDH terminal devices of the ring networking scene, but retransmission of non-local service telephone services can be realized, so that long-distance cross-node transmission of service telephone services among the SDH terminal devices with the same structure is realized.

(4) A fourth ring networking scenario (each SDH terminal device is provided with a backup group circuit board card and a service telephone service access board card, and the SDH ports of the current network side are the SDH ports of the backup group circuit board card)

Referring to fig. 11, in the above-mentioned application scenario of ring networking, the SDH terminal device 1, SDH terminal device 2, and SDH terminal device 3 are three SDH terminal devices proposed in the embodiment of the present invention, and each SDH terminal device includes: the system comprises a business telephone service control board card, a business telephone service access board card, a main group board card and a standby group board card; the SDH terminal equipment 1, the SDH terminal equipment 2 and the SDH terminal equipment 3 are connected by optical fiber rings through respective SDH ports;

the official telephone service control board card of each SDH terminal device can determine and locally store optional cross path information for official telephone service transmission according to the determined position information of different board cards connected to the overhead interface of the board and the state of the board card of the current workgroup:

(i) SDH terminal apparatus 1: the cross path from the overhead interface of the official telephone service access board card connected with the telephone interface of the official telephone service access board card to the overhead interface of the current working group board card connected with the SDH port on one network side of the standby group board card, and the cross path from the overhead interface of the official telephone service access board card connected with the telephone interface of the official telephone service access board card to the overhead interface of the current working group board card connected with the SDH port on the other network side of the standby group board card, wherein the SDH port on one network side and the SDH port on the other network side are respectively SDH ports in east-west and-west directions of a ring network;

(ii) SDH terminal apparatus 2: the cross path from the overhead interface of the official telephone service access board card connected with the telephone interface of the official telephone service access board card to the overhead interface of the current working group board card connected with the SDH port on one network side of the standby group board card, and the cross path from the overhead interface of the official telephone service access board card connected with the telephone interface of the official telephone service access board card to the overhead interface of the current working group board card connected with the SDH port on the other network side of the standby group board card, wherein the SDH port on one network side and the SDH port on the other network side are respectively SDH ports in east-west and-west directions of a ring network;

(iii) SDH terminal apparatus 3: the cross path from the overhead interface of the official telephone service access board card connected with the telephone interface of the official telephone service access board card to the overhead interface of the current working group board card connected with the SDH port on one network side of the standby group board card, and the cross path from the overhead interface of the official telephone service access board card connected with the telephone interface of the official telephone service access board card to the overhead interface of the current working group board card connected with the SDH port on the other network side of the standby group board card, wherein the SDH port on one network side and the SDH port on the other network side are respectively SDH ports in east-west and-west directions of a ring network;

when the SDH terminal device 1 packages the official telephone service (signaling and voice service) received by the telephone interface of the official telephone service access board card according to a predetermined format and sends the service to the overhead interface of the board card; the official telephone service control board card receives the official telephone service from the corresponding overhead interface, determines the current cross path according to the locally stored optional cross path and the network side transmission direction, and then transmits the official telephone service to the overhead interface of the current working group board card connected with the network side output SDH port (namely SDH port 2) of the standby group board card; then, the output SDH port of the backup group path board card is output to the determined network side; specifically, the transmitting the overhead interface of the currently operating group circuit board card to the output SDH port of the standby group circuit board card may include: if the current working group circuit board card is the standby group circuit board card, the business telephone service is directly transmitted to the SDH port of the standby group circuit board card through the overhead interface of the standby group circuit board card, and if the current working group circuit board card is the main group circuit board card, the business telephone service is transmitted to the output SDH port of the standby group circuit board card connected with the business telephone service through the overhead interface of the main group circuit board card; and the current working group circuit board card can be determined by the official telephone service control board card according to the current states of the main group circuit board card and the standby group circuit board card.

When the backup group circuit board card of SDH terminal equipment 2 inputs SDH port (that is SDH port 1) and receives data from network side, it transmits it to overhead interface of current working group circuit board card, after the service telephone service control board card receives data from corresponding overhead interface, according to local stored selectable cross path and current network side transmission direction it determines current cross path and cross transmits service telephone service to overhead interface connected with service telephone service access board card, after the service telephone service access board card determines that the service telephone service inputted by overhead interface is not service telephone service which needs to be outputted locally, it is returned to service telephone service control board card by local overhead interface, and after the service telephone service control board card determines current cross path according to selectable cross path and current network side transmission direction it cross transmits it to overhead interface connected with output SDH port (that is SDH port 2) of backup group circuit board card, outputting the SDH data to the network side through the output SDH port;

when a backup group circuit board card of the SDH terminal device 3 inputs data from an SDH port (that is, SDH port 2) and receives the data from the network side, the data is simultaneously transmitted to overhead interfaces of a main group circuit board card and a backup group circuit board card, a service telephone service control board receives the data from an overhead interface corresponding to a currently operating group circuit board card and determines that the received data is a service telephone service, the service telephone service is cross-transmitted to an overhead interface connected to a service telephone service access board card after determining a current cross path according to a locally stored selectable cross path and a current network side transmission direction, and the service telephone service access board determines that the service telephone service needs to be locally output and then outputs the service telephone service.

Compared with the ring networking scene I, the scene is additionally provided with the standby group circuit board card in the SDH terminal equipment, and all the SDH terminal equipment in the bidirectional ring network is provided with the service telephone service access board card, so that the service telephone service can be transmitted in the SDH network without changing the external network connection structure when the current working state is selected according to the working states of the main group circuit board card and the standby group circuit board card, and the service telephone service long-distance cross-node transmission among the SDH terminal equipment with the same structure can be realized.

(5) Ring networking scene five (Ring cutting ring, and tangent SDH terminal equipment without official telephone service access board card)

Referring to fig. 12, in the above-mentioned application scenario of ring networking, the SDH terminal device 1, SDH terminal device 3, SDH terminal device 4, and SDH terminal device 5 are five SDH terminal devices proposed in the embodiment of the present invention, and the SDH terminal device 1, SDH terminal device 3, and SDH terminal device 5 all include: the system comprises a business telephone service control board card, a business telephone service access board card, a main group board card and a standby group board card; and the DH terminal device 2 and the SDH terminal device 4 as ring-tangent points include: the official telephone service control board card, the main group board card and the standby group board card, but do not include: the official telephone service access board card; the SDH terminal device 1, the SDH terminal device 2, and the SDH terminal device 3 are annularly connected by optical fibers through respective SDH ports, and the SDH terminal device 2, the SDH terminal device 4, and the SDH terminal device 5 are also annularly connected by optical fibers through respective SDH ports, where the SDH terminal device 2 is a ring tangent point;

after the SDH terminal device 1, the SDH terminal device 2, the SDH terminal device 3, the SDH terminal device 4, and the SDH terminal device 5 are started, the following information of the SDH terminal device to which each official telephone service control board card belongs is determined:

and the business telephone service control board cards of the SDH terminal equipment 1, the SDH terminal equipment 3 and the SDH terminal equipment 5 also determine the following information of the SDH terminal equipment:

(iii) the official telephone service access board is in place and records the position information of the overhead interface of the board correspondingly connected with the official telephone service access board;

(ii) SDH terminal apparatus 2: a cross path from the overhead interface of the current working group circuit board card connected with one network side SDH port of the main group circuit board card to the overhead interface of the current group circuit board card connected with the other network side SDH port of the main group circuit board card; and a cross path from the overhead interface of the current working group circuit board card connected with one network side SDH port of the standby group circuit board card to the overhead interface of the current group circuit board card connected with the other network side SDH port of the standby group circuit board card; the network side SDH ports are four SDH ports in two ring bi-directions and are respectively positioned on the main group circuit board card and the standby group circuit board card;

(iv) SDH terminal apparatus 4: a cross path from the overhead interface of the current working group circuit board card connected with one network side SDH port of the main group circuit board card to the overhead interface of the current group circuit board card connected with the other network side SDH port of the main group circuit board card;

(v) SDH terminal apparatus 5: a cross path from an overhead interface of the official telephone service access board card connected with a telephone interface of the official telephone service access board card to an overhead interface of a current working group board card connected with an SDH port on one network side of the main group board card, and a cross path from the overhead interface of the official telephone service access board card connected with the telephone interface of the official telephone service access board card to an overhead interface of the current working group board card connected with an SDH port on the other network side of the main group board card, wherein the SDH port on one network side and the SDH port on the other network side are respectively SDH ports in east-west and-west directions of a ring network;

When the service transmission of the official telephone is required between the SDH terminal device 1 and the SDH terminal device 5, the SDH terminal device 2 makes the two rings connected to a whole ring at the SDH port of the network side by adding an effective cross path (in the figure, the overhead interface connected with the SDH port 1 of the main cluster board card in the SDH terminal device 2 and the overhead interface connected with the SDH port 1 of the standby cluster board card are cross-connected; and the overhead interface connected with the SDH port 2 of the main cluster board card in the SDH terminal device 2 and the overhead interface connected with the SDH port 2 of the standby cluster board card are cross-connected), and then each SDH terminal device respectively determines the service transmission path of the official telephone of the respective network side; then, the transmission of the official telephone service between the SDH terminal device 1 and SDH terminal device 5 can be completed by a method similar to the above-described scenario.

Compared with a single ring networking scene from one ring networking scene to four ring networking scenes, the ring-tangent ring scene is characterized in that an additional cross path is arranged in SDH terminal equipment serving as a ring tangent point, so that two rings can become a communicated whole ring, and thus, the transmission of a business telephone service of a cross-ring node is realized.

The embodiment of the invention has the following advantages:

1. the communication function can be realized by upgrading on the basis of the original equipment, and the original service configuration of the equipment does not need to be changed;

2. a ring network topology can be realized;

3. the device configuration can be reduced and the usability can be improved.

The embodiment of the invention also provides SDH terminal equipment, which comprises a service telephone service control board card for executing the method and a board card electrically connected with the service telephone service control board card; the board card electrically connected to the official telephone service control board card may include: a main group road board card; or the main group road board card and the standby group road board card; or the main group circuit board card and the official telephone service access board card; or, the main group path board card, the standby group path board card and the service telephone service access board card, and the method for transmitting the service telephone service in the SDH bidirectional ring network by each board card has been described above, and is not described herein again.

Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A method for transmitting official telephone service is characterized in that the method is applied to SDH terminal equipment of a synchronous digital hierarchy SDH bidirectional ring network; the method comprises the following steps:

2. The method of claim 1, wherein the official telephone service control board determines receipt of official telephone service by:

3. The method according to claim 1, wherein the determining of the output direction of the business telephone service at the SDH terminal device when the SDH terminal device in the bidirectional ring network initiates a business telephone service request specifically includes:

4. The method of claim 1, wherein the board electrically connected to the official telephone service control board card is: a main group road board card;

5. The method of claim 4, wherein forwarding the official telephone traffic by the official telephone traffic control board according to the current cross path comprises:

the method further comprises the following steps:

6. The method of claim 1, wherein the board electrically connected to the official telephone service control board card is: a main group circuit board card and a service telephone service access board card;

7. The method of claim 6, wherein forwarding the official telephone traffic by the official telephone traffic control board according to the current cross-path comprises:

8. The method of claim 7, further comprising:

9. The method of claim 1, wherein the board electrically connected to the official telephone service control board card is: the main group circuit board card and the main group circuit board card form a standby group circuit board card which protects each other,

10. The method of claim 9, wherein forwarding the official telephone traffic by the official telephone traffic control board according to the current cross-path comprises:

the method further comprises the following steps:

11. The method of claim 1, wherein the board electrically connected to the official telephone service control board card is: the main group circuit board card and the main group circuit board card form a standby group circuit board card and a business telephone service access board card which are mutually protected;

12. The method according to claim 11, wherein when the present SDH terminal device is a tangent point of a circular tangent ring, the current cross path is: the method comprises the steps that an overhead interface connected with an overhead interface of a current workgroup path board card connected with a current network side input SDH port is connected with an overhead interface of the current workgroup path board card connected with a current network side output SDH port through an effective additional cross path;

13. The method of claim 11, wherein forwarding the official telephone traffic by the official telephone traffic control board according to the current cross-path comprises:

14. The method of claim 13, further comprising:

15. The method of claim 10 or 14, wherein forwarding the public service telephone traffic to the current network side output SDH port by the current workgroup linecard comprises:

16. The method according to claim 8 or 14, wherein the official telephone service access board determines that the official telephone service that needs to be locally output is specifically: the receiving and sending information included in the official telephone service is local information.

17. A synchronous digital hierarchy, SDH, terminal apparatus comprising a official telephone service control board card for performing the method of any of claims 1 to 14 and a board card electrically connected to the official telephone service control board card.