JPH05122348A - Subscriber circuit control method in time division exchange - Google Patents

Abstract

PURPOSE:To relax a bottle neck of a processing capability of a subscriber exchange and a common line signal network by connecting a monitor control channel of the subscriber circuit to a host system together with a voice channel and allowing the host system to directly control the subscriber circuit to implement outgoing incoming call relay connection of the subscriber. CONSTITUTION:A line concentrator 3, a time division network 4 and a synchronization terminal station equipment 5 are controlled by a controller 6, and an outgoing call to a host system is in relay connection to a monitor control channel of a subscriber circuit together with a voice channel. When the outgoing call management and processing after the end of relay connection to the host system are implemented entirely by the host system, the processing by the subscriber line exchange requires almost interruption monitor from the host. As a result, in the case of the arrival of a call from the host system to a telephone set 1, the voice and monitor control channel only are connected and the control for call reply monitor is not required. Thus, the processing capability of the subscriber line exchange is improved and the load to the common line signal network is relieved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to subscriber circuit control in a time-division exchange, and in particular, it realizes various services using cash or prepaid cards in public telephones, subscriber line tests, etc. The present invention relates to a method of processing incoming / outgoing calls that requires special processing to a higher-level system. The present invention also relates to a method for reducing the load on the subscriber exchange and the common signaling network in the processing of the incoming and outgoing calls, thinning the coupling between the subscriber exchange service system and the host system, and improving the processing capacity.

[0002]

2. Description of the Related Art A conventional subscriber circuit (hereinafter referred to as SLIC) of a time division switch is equipped with all the monitoring / controlling functions of a telephone terminal except a low level signal within a telephone band. The above-mentioned monitoring and control functions of the transmission system include (1) outgoing (OFFHOOK) monitoring, (2) dial pulse monitoring, (3) partner response signal (levers) control during pay calls, and (4) various types including coin storage in public telephones. Control signal transmission control (5) There is a coin storage identification signal monitor for public telephones.

Further, the functions of the incoming call system include (1) an intermittent ringing signal (IR) or a continuous ringing signal (C).
R) Sending control (2) Non-ringing incoming call control to telemeter terminals, etc. (3) Disconnection monitoring (ONHOOK), etc.

Further, as maintenance / testing system functions, there are (1) line-side pull-in switch (LT) control (2) station-side pull-in switch (NT) control, which are used for subscriber line testing and backup SLIC in case of SLIC failure. Used for switching, SLIC characteristic test, etc. The above-described functions of the SLIC are individually processed by the subscriber line exchange that accommodates the SLIC, or the subscriber line exchange is centrally controlled and managed based on an instruction from the host system. .. In addition, Tsuken Practical Report 31, NO. 11, P1995 "Concentration system and subscriber circuit of digital subscriber line exchange" describes an example of the above device.

[0005]

With the sophistication and diversification of telephone services in recent years, the processing performed by subscriber line exchanges has become complicated, and the processing capacity has reached the limit. In addition, the amount of communication with the host system has also increased and become complicated, and the capacity of the common line signaling network, which is the communication path between the switching nodes, has reached the limit. It is an object of the present invention to provide a subscriber circuit control method in a time division switch in which the processing capacity of the subscriber line switch and the bottleneck of the common line signaling network are alleviated.

[0006]

In order to solve the above-mentioned problems, a subscriber circuit (SL) is installed in a time division switch which accommodates subscribers.
IC) means for connecting the monitoring / control channel together with the voice channel to the host system, and means for directly controlling the subscriber circuit from the host system side are provided,
Make incoming relay connections. Further, as one method of the present invention, means for monitoring / controlling a subscriber circuit is provided in the host system, whereby a subscriber circuit monitoring / control channel connected with a voice channel is used to connect the time-division switch. Direct control of the subscriber circuit.

[0007] Further, by the above-mentioned host system, subscriber control such as re-calling after the call of the additional charge service for the application call made by the subscriber is finished, and direct control of the charge collection for the call originated from the public telephone are performed. To Further, by the above-mentioned host system, subscriber control such as re-calling is performed after the call of the application call transmission to the fire department, police station, etc. performed by the subscriber is completed. further,
The host system directly controls and monitors the subscriber's circuit by the above-mentioned system, and the subscriber's failure report and call for line test connection etc.
Perform functional tests such as calling and dial pulse.

[0008]

By controlling the SLIC directly from the host system, the processing amount of the subscriber line exchange is reduced and the communication amount between the nodes of the common line signaling network is also reduced. Further, special call processing of the subscriber line accommodation exchange in various surcharge service systems, fire / police control system, subscriber line test system, etc. and the amount of processing to collect charges to public telephones in the surcharge service are reduced. Further, due to the reduction in the throughput of the subscriber line accommodation exchange, the coupling between the individual service systems and the subscriber accommodation exchange is diluted.

[0009]

1 is a conceptual diagram of a time division exchange according to the present invention. The subscriber circuit (SLIC) 2 is connected to the telephone (TEL) on a one-to-one basis and monitors and controls the telephone. The SLIC 2 converts upstream and downstream voice channel signals into digital or analog signals, and connects the telephone monitoring / control channel to the concentrator 3. The concentrator 3 collects a large number of SLICs by concentrating a large number of SLICs to a time division network (TDNW) 4 by a call detection function of the telephone 1, a function of monitoring and controlling reception of dial pulses, and the like. It has a function to connect.

The concentrator 3, the TDNW 4, the synchronous terminal device 5 which is a digital relay device, etc. are controlled by the control device 6 and relay all outgoing calls to the host system to the SLIC monitoring / control channel together with the voice channel.
Connection control of voice and monitoring / control channels to the host system is performed by (1) a system in which the signal device 7 uses the line signal of the synchronous terminal device 5 (2) a controller of the host system by a common line signaling network There are two methods of doing it directly.

In the case of the line signal system of (1), the line signal channel of the synchronous terminal device 5 is connected to the signal device 7 via the fixed path of the TDNW 4. According to the present invention, in any of the above methods, the outgoing call management and processing after completion of the relay connection to the upper system are all performed by the upper system. As a result, the processing in the subscriber accommodation exchange can be limited to monitoring disconnection from the host.
As a result, when a call is received from the host system to the telephone, only voice and monitor / control channels are connected, and control such as call / answer monitoring can be eliminated. In addition to the line signal monitoring / controlling function, the signaling device 7 of FIG. 1 has a transmitting / receiving function of transmitting a dial tone (DT) and a multi-frequency signal such as a PB signal in the voice band. The solid line from the SLIC2 to the host system, the arrow, and the like indicate the direction of voice, and the broken line indicates the SLIC monitoring / control channel.

In the time-division exchange of the system of the present invention shown in FIG. 1, the line concentrator 3 needs a new structure. For the other parts, the conventional switch configuration can be used as it is by realizing the pair connection between the voice and the SLIC monitoring / control channel by the controller software. FIG. 2 is a block diagram of an embodiment of the line concentrator 3. In addition, SL of FIG.
The IC 2 is shown included within the concentrator 3. SLIC
The audio from 2 and the monitoring / control channels are multiplexed / demultiplexed by the multiplexing / demultiplexing circuit 31, for example, in units of 1024 circuits. The separated audio signal is connected to the concentrator switch 32, and the SLIC monitoring channel is connected to the concentrator switch 32 and the call monitoring circuit (LSCN) 33.

The SLIC control channels from the line concentrator switch 32 and the SLIC control circuit (SSD) 34 are logically ORed by the OR circuit 35 to multiplex / demultiplex circuit 3.
Since it is input to 1, it is possible to perform local control and control from a host system. An outgoing call from the telephone 1 is detected by the LSCN 2 and notified to the control device 6. The control device 6 determines the telephone type from the subscriber data, and in the case of a DP telephone, controls the concentrator switch 32 to set the SLIC monitoring channel to the dial pulse receiving circuit (DPR) 36 and the disconnection / response monitoring circuit (TSCN) 37. Connect and receive the called party number. The audio channel is the signaling device 7 via the TDNW4.
And a dial tone (DT) is transmitted.

If the telephone 1 is a PB telephone, the signaling device 7 receives the other party's number through the voice channel.
If the connection destination is a host system that requires relay of voice and monitoring / control channels, the above connection is first performed, and after the connection is completed, the concentrator switch 32 disconnects the monitoring channel of the telephone 1 from the TSCN 37 to monitor the telephone. Move the operation to the upper system. Also in the control channel, the control data in the SDD 34 is invalidated, the control data of the host system is validated, and the entire control is transferred to the host system. In the case where the connection destination is only the voice relay connection as in the own station, the monitoring channel continues to be monitored while being connected to the TSCN via the concentrator switch 32, and the control data is sent from the SSD 34 to the control channel. ..

FIG. 3 shows an example of the configuration of the host system when the connection control of the present invention is performed by the host system. An incoming call from the subscriber accommodation exchange is detected by the supervisory signal device 82 using the line signal from the synchronous terminal device 81, and is notified to the control device 6. At this time, if there is necessary data to be transmitted / received to / from the exchange such as telephone type or service type, the time divisional switch 83 is closed, and the signal device 84 transmits / receives using a multi-frequency signal. Then, the voice channel (solid line) from the exchange is connected to various reception boards or service circuits to perform a designated service. Monitor at the same time
The control channel (broken line) is S in the SLIC control circuit 85.
SD (subscriber circuit signal distribution circuit) 86 and TSCN circuit 8
7, so that all of the telephone monitoring and control required in a series of sequences corresponding to service types can be performed on the host system side.

Similarly, when receiving an incoming call to the subscriber accommodation exchange, after the connection control with the exchange is completed, the monitoring / control channel is connected to the SLIC control device, and all the telephone monitoring / control for each service type is performed by the upper system side. Try to do it. Although not shown in FIG. 3, the outgoing / incoming connection control with the subscriber accommodation exchange can be performed using a common line signal. The TSCN circuit 87 turns on the telephone.
HOOK, OFFHOOK monitoring, dial pulse reception,
It also performs operations such as monitoring coin identification signals of public telephones.

FIG. 4 is a conceptual diagram of a system to which the method of the present invention is applied. (1) When a call application is issued from the telephone (TEL) 1, the subscriber line exchange 90 makes a connection indicated by 91,
The voice and monitoring / control channels of the SLIC 2 corresponding to the telephone 1 are connected to the surcharge service system 95 via the relay network 94. After the call is finished, the additional charge service system 95 directly notifies the call charge including the fee by re-calling using the monitoring / control channel.

(2) When the telephone set 1 is a public telephone and sends an additional charge service such as telephone guidance, the subscriber line exchange 90 similarly makes the connection indicated by 91, and the connection is made via the relay network 94. The voice and monitoring / control channels of the SLIC 2 corresponding to the telephone 1 are connected to the surcharge service system 95 having a necessary service function such as a guidance function. Further, the additional charge service system 95 directly performs charge collection control corresponding to each service, collection confirmation, etc. using a monitoring / control channel.

(3) When a call is made from the telephone 1 to a fire station or a police station, the subscriber line exchange 90 makes the connection indicated by 92, and the SLIC 2 corresponding to the telephone 1 is connected via the relay network 94. The voice and monitoring / control channels are connected to the fire and police command system 96. Also, the fire / police command system 96 directly controls the telephone 1 using the monitoring / control channel to perform necessary control such as re-calling after ONHOOK.

(4) When a failure report is issued from the telephone set 1 or a test signal from the subscriber line test system 97 is received, the subscriber line exchange 90 makes the connection indicated by 93, and the relay network The voice and monitoring / control channels of the SLIC 2 corresponding to the telephone 1 are connected via 94 to the subscriber line test system 97. In addition, the subscriber line test system 97 monitors and controls the control necessary for functional tests such as call, call, dial pulse, and coin storage in the subscriber line test items, and an active SLIC corresponding to the subscriber.
Directly using and. In addition, the subscriber line test system 97 is a line-side pull-in switch (LT) in the SLIC which is necessary when testing the subscriber line medium.
It also directly controls the station-side retract switch (NT), etc.

[0021]

The following effects can be obtained by the present invention. (1) Since the special processing corresponding to various telephone service systems, which was conventionally performed by the subscriber accommodation exchange, can be directly performed by the host system side, the subscriber accommodation exchange having only the standardized basic functions. This makes it possible to handle the special processing corresponding to the various telephone service systems, and to improve the processing capacity of the subscriber accommodation exchange. (2) Since the upper service system directly controls the telephone terminal as required, it is possible to reduce the amount of communication between nodes with the subscriber accommodation exchange and reduce the load on the common line signaling network. (3) Since the coupling between individual service systems and subscriber line exchanges will be diluted, each service function will be expanded independently.
Can be developed.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a time division exchange according to the present invention.

FIG. 2 is a configuration diagram of an embodiment of a time division exchange and a concentrator according to the present invention.

FIG. 3 is a configuration diagram of a host system embodiment according to the method of the present invention.

FIG. 4 is a conceptual diagram of various systems to which the method of the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Telephone 2 Subscriber circuit 3 Concentrator 4 Time division network (TDNW) 5 Synchronous terminal device 6 Control device 7 Signal device 31 Multiplexing / dividing circuit 32 Concentration switch 33 Call monitoring circuit (LSCN) 34 SLIC control circuit (SSD) 35 OR circuit 36 Dial pulse receiving circuit (DPR) 37 Disconnection / response monitoring circuit (TSCN) 81 Synchronous terminal device 82 Monitoring signal device 83 Time division switch 84 Signal device 85 SLIC control circuit 86 Subscriber circuit signal distribution circuit (SSD) ) 87 TSCN circuit 90 Subscriber line switch 94 Relay network 95 Surcharge service system 96 Fire and police command board system 97 Subscriber line test system

Claims (6)

[Claims] 1. A method of controlling outgoing / incoming relay connection of a subscriber housed in a time division switch, means for connecting a monitoring and control channel of the subscriber circuit together with a voice channel to a host system, and the host system side. Is provided with a means for directly controlling the subscriber circuit,
A subscriber circuit control method in a time division switch, characterized in that an incoming relay connection is performed. 2. The method according to claim 1, further comprising means for monitoring / controlling a subscriber circuit in the host system, and by using the subscriber circuit monitoring / control channel connected with a voice channel by the means. A subscriber circuit control method in a time division exchange, characterized in that a subscriber circuit is directly controlled. 3. The method according to claim 1 or 2, wherein the host system performs subscriber control such as re-calling after the call of the additional charge service call for the application call made by the subscriber is completed. Subscriber circuit control method in a split exchange. 4. The subscriber circuit control method in a time division switch according to claim 3, wherein the upper system directly controls charge collection for outgoing calls from public telephones. 5. The subscriber system according to claim 1 or 2, wherein the host system performs subscriber control such as re-calling after the call is completed by the subscriber to call the fire station or police station. A subscriber circuit control method in a time division switch. 6. The subscriber system according to claim 1 or 2, wherein the host system directly controls and monitors the subscriber circuit to perform a failure report made by the subscriber and a function test such as call / call / dial pulse for line test connection. A subscriber circuit control method in a time division exchange characterized by being performed.