JP2002300276A - Reset method for remote side exchange and exchange system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reset method for remote side exchange and an exchange system, with which a plurality of remote side exchanges can be simultaneously reset. SOLUTION: A host side exchange (LE) 1 determines a specific message on the protocol of LAPV5 as reset request data and transmits it to a remote side exchange (AN) 51. The AN 51 has a function for performing autonomous resetting when this specific message is received (it is similar for the other AN such as 5m). Since a system manager 3 on the side of the LE 1 performs control related to the transmission of the reset request data, resetting can be instructed to all the remote side exchanges connected to the LE 1 and further, centralized management is enabled in such control. When it is desired to reset a certain specific AN 51, by transmitting the reset request data from the system manager 3 in the LE 1 to the relevant AN 51, resetting can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for resetting a remote exchange and an exchange system, and more particularly to a reset method and an exchange for a remote exchange which resets a remote exchange connected to a host exchange via a V5 interface. About the system.

[0002]

2. Description of the Related Art Conventionally, a remote exchange (AN: Access Network) accommodating one or more subscriber telephones.
However, an exchange system connected to a host-side exchange (LE: Local Exchange) via a V5 interface is known. Here, the V5 interface is based on the European Telecommunications Standard Insti
tute) issued by ETS 300 324-1 and ETS 300 347-1, and also specified in International Telecommunication Union Telecommunication Standardization Sector (ITU-T) Recommendations G964 and G965. This is an interface specification and is composed of V5.1 and V5.2.

[0003] In the above-mentioned remote exchange (AN), the line type (analog line or digital line) of the subscriber telephone (subscriber terminal) accommodated by the AN and other information are stored. In the host exchange (LE), subscriber terminal information of all ANs to which the LE is connected is stored. Digital data such as voice data is transmitted between the AN and the LE via a V5 interface having a basic unit of 32 time slots of 64 kbps. The control data is transmitted in a specific time slot (communication channel).

In the switching system in which the AN and the LE are connected by the V5 interface, if the AN stops operating for some reason, the maintenance staff conventionally goes to the AN to recover the system. The reset is performed by directly pressing the reset button attached to the AN. This reset initializes the AN and clears information stored in the AN, such as the line information of the subscriber's telephone.
The program for operating N itself is not cleared,
Based on the recommendation of the V5 interface, the restart operation is performed on both the LE side and the AN side.

[0005] The restart operation is always performed when a reset is performed on the LE side or the AN side, or when a signal line for transmitting a signal during that time is disconnected / restored.
By this restart operation, data transmission / reception is performed such that the line information of the subscriber's telephone set and the like match on both the LE side and the AN side. Actually, since all information is held by the LE side, information of the subscriber's telephone is exchanged from the LE to the AN direction, and completion of reception is transmitted from the AN to the LE direction.

[0006]

However, in the above-mentioned conventional exchange system, in order to reset one or a plurality of remote exchanges (ANs), it is necessary to reset the remote exchange (AN) to the LE installed at a remote place. The maintenance staff needs to go,
There is a problem that it takes time to move and cannot be reset immediately. Further, even if it is attempted to reset a plurality of ANs at the same time, the reset cannot be performed at the same time because of the above-mentioned moving time.

[0007] The present invention has been made in view of the above points,
It is an object of the present invention to provide a reset method of a remote exchange and an exchange system capable of immediately resetting a remote exchange when a reset is required.

It is another object of the present invention to provide a method of resetting a remote exchange and a switching system capable of simultaneously resetting a plurality of remote exchanges.

[0009]

In order to achieve the above object, a reset method according to the present invention comprises the steps of: resetting a host exchange in one or more remote exchanges connected by a V5 interface; A first step in which a specific message on the LAPV5 protocol is determined and transmitted as reset request data to a remote exchange, and a second operation in which the remote exchange that has received the reset request data autonomously performs a reset operation And a step.

In order to achieve the above object, an exchange system according to the present invention comprises a single host exchange and a V5 interface corresponding to one or more terminating devices of V5 related messages in the host exchange. One or two or more remote exchanges connected in the same manner, wherein the remote exchanges each accommodate one or more subscriber telephones, wherein the host exchange is one or more remote exchanges. The remote exchange having a specific message on the LAPV5 protocol as reset request data for transmission to the remote exchange requiring resetting via the terminating device, and receiving the specific message. In such a case, a reset means for autonomously resetting when the operation is performed is provided.

In the method and system for resetting a remote exchange according to the present invention, a specific message on the LAPV5 protocol is defined as reset request data and transmitted to the remote exchange. When the remote exchange receives the specific message, Since the reset operation is performed at the same time, the remote exchange can be reset under the control of the host exchange without going to the installation location of the remote exchange.

[0012] In order to achieve the above object, the present invention is also applicable to the case where there are a plurality of remote exchanges that need to be reset, and the same specific exchange is applied to a plurality of remote exchanges that need to be reset. It is characterized in that messages are output in parallel independently of each other as reset request data. According to the present invention, a plurality of remote exchanges can be reset simultaneously.

In order to achieve the above object, the present invention provides a specific message as reset request data.
It is characterized in that a message to be transmitted when a layer 2 link is established is determined and transmitted. In the present invention, layer 2
Even if the link is not established, reset request data can be transmitted from the host exchange to reset the remote exchange that needs to be reset.

[0014]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a block diagram of an embodiment of the exchange system according to the present invention. This embodiment is based on the ETS300 324-1 (V5.1) described above.
1 shows an exchange system using a data link layer (LAPV5) protocol defined in ETS300 347-1 (V5.2).

In FIG. 1, a host-side exchange (LE) 1
Are terminating devices 21 to 2n of V5 related messages, and V5
A system manager 3 for controlling the interface;
The communication path switch 4 is roughly configured. Further, the remote exchanges (AN) 51 and 5m use the LAPV5 protocol to perform LAPV in the host exchange (LE) 1.
5 are connected to the terminating devices 21 and 2n for terminating the five protocols and accommodate subscriber telephones 61 to 6j and 71 to 7k, respectively.

In this exchange system, the switches in the remote exchanges (AN) 51 and 5m are switched by an instruction from the system manager 3 which controls the LE 1 to be accommodated in the same remote exchange (AN). By switching off the communication path switch 4 in the host-side exchange (LE) 1 and the switches in the remote-side exchanges 51 and 5m, which are connected to the other subscriber telephones installed in the host-side exchange (LE) 1, Connected to the subscriber telephones accommodated in all the remote exchanges 51 and 5m connected to the terminating devices 21 to 2n. In this way, the function as an exchange is realized.

FIG. 2 shows an LAPV 5 used for communication between the host-side exchange (LE) 1 and the remote-side exchange (AN) 51 (or 5 m) on the above-mentioned exchange system.
Indicates the format of the data format specified in the protocol. In the figure, in the data format, "EFad
“dr” is a subscriber identification number for an ISDN subscriber negotiated between the LE 1 and the AN 51 that are communicating. "DLaddr" is an SAPI (Service Access Point Identifier) that indicates the type of service provided to the upper layer.
Identifier) and a TEI (Termina) indicating each subscriber telephone.
l Endpoint Identifier)
It contains service information for the subscriber specified by addr and telephone-specific information.

"Control" is EFadd
Indicates the instruction information from LE1 to the subscriber specified by r. "Information" is Control
And additional layer information at higher levels. “FCS” is check information for indicating whether or not all the above data is correct. “FLAG” is information indicating the front and rear of all the above data.

In this embodiment, EFaddr and DLaddr are set to “817” in the data format shown in FIG.
5 and the control is defined as data having a value such as "127" as "reset request data to the remote exchange". Further, as shown in FIG. 3, the reset request data 10 is transmitted from the LE 1 to the AN 51. A
In N51, a function of autonomously resetting is provided (the same applies to other ANs such as 5m).

The control regarding the transmission of the reset request data 10 is performed by the system manager 3 on the LE 1 side.
Performs all ANs connected to LE1.
A reset instruction can be issued at 51 and 5 m.
The control can be centrally managed. A specific AN
If you want to reset the AN51
The reset can be realized by transmitting the above-described reset request data 10 from the system manager 3 in the LE 1 to the corresponding AN 51 without the maintenance staff going to the installation location.

Normally, when a message is transmitted from the LE 1 to the ANs 51 and 5m, it is necessary to establish a layer 2 link. However, this reset request data 10 indicates that the layer 2 link has not been established. Can also be sent. The reason is that the message defined as the reset request data has a Control value of “127”.
Is a message transmitted when a layer 2 link is established, which is "SABME". This message can be transmitted to the ANs 51 and 5m regardless of whether the link is established.

Therefore, according to the present embodiment, the reset request data 10 can be transmitted even if the layer 2 link is not established, and the reset request data 10 is transmitted to all ANs connected to LE1. The reset request data of the same message content can be transmitted in parallel independently of each other, and the reset request data itself has a small data length.
Since there is almost no delay to each AN without being congested in the exchange, a plurality of ANs can be immediately reset when a reset need arises.

The present invention is not limited to the above-described embodiment.
SABME "is defined as the reset request data, but it is also possible to determine and transmit a specific message of LAPV5 as the reset request data when the link is established.

[0024]

As described above, according to the present invention,
A specific message on the LAPV5 protocol is defined as reset request data and transmitted to the remote exchange, and the remote exchange performs a reset operation when receiving the specific message, so that the maintenance staff can determine the location of the remote exchange. The remote switch can be reset under the control of the host switch without having to go to the remote switch, so when the need for reset occurs, the remote switch can be reset immediately. The cost of going to the installation location of the remote exchange can be eliminated.

Further, according to the present invention, by outputting the same specific message as reset request data in parallel independently of each other, a plurality of remote exchanges can be reset at the same time. Even if a link is not established, reset request data can be transmitted from the host exchange to immediately reset the remote exchange requiring resetting with almost no delay.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the system of the present invention.

FIG. 2 is a diagram showing an example of a data format transmitted in the embodiment of FIG.

FIG. 3 is a diagram showing a data format defined as reset request data in the embodiment of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Host-side exchange (LE) 21-2n Terminating device of V5 related message 3 System manager 4 Communication path switch 51, 5m Remote-side exchange (AN) 61-6j, 71-7k Subscriber telephone set 10 Reset request data

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5K026 AA23 CC07 EE08 FF25 GG20 GG26 5K051 AA09 DD02 DD13 HH02 HH15 LL01

Claims (6)

[Claims] 1. A request message for resetting a specific message on the LAPV5 protocol to a remote exchange which needs to be reset among one or more remote exchanges to which a host exchange is connected by a V5 interface. And transmitting the reset request data. The remote exchange that has received the reset request data autonomously performs a reset operation. 2. In the first step, when there are a plurality of remote exchanges that need to be reset, the same specific message is sent to a plurality of remote exchanges that need to be reset. 2. The method according to claim 1, wherein the reset request data is output independently and in parallel. 3. The method according to claim 1, wherein the first step includes the step of transmitting the reset request data as the specific message using layer 2
3. The method according to claim 1, wherein a message to be transmitted when the link is established is determined and transmitted. 4. A single host exchange and one or more remote exchanges connected by a V5 interface corresponding to one or more terminating devices of V5 related messages in the host exchange. Wherein the remote-side exchanges each include one or more subscriber telephones, wherein the host-side exchange is a remote-side exchange that needs to be reset among the one or more remote-side exchanges. On the other hand, the remote exchange has a transmission means for defining a specific message on the LAPV5 protocol as reset request data and transmitting the reset request data via the terminating device, and the remote exchange automatically resets when receiving the specific message. An exchange system comprising reset means. 5. When there are a plurality of remote exchanges that need to be reset, the transmitting unit sends the same specific message to a plurality of remote exchanges that need to be reset. 5. The exchange system according to claim 4, wherein the reset request data is transmitted independently and in parallel. 6. The exchange according to claim 4, wherein the transmitting unit determines and transmits a message transmitted when a layer 2 link is established, as the specific message used as the reset request data. system.