JPS60123146A - Line editing system of digital exchange - Google Patents

Abstract

PURPOSE:To attain line edition in the unit of one voice line by providing a line editing function to a part of a highway of a digital exchange. CONSTITUTION:An exchange station a0 in an area of a station A is connected to an incoming highway 21, an outgoing highway 31 and a line editing switch 11 via an interface circuit 41. Moreover, an exchange station b1 in an area of a station B and the station a0 are connected by interfaces 42, 43. In the line editing operation, lines accommodated in incoming highways 21-23 and outgoing highways 31-33, e.g., a direct line between the stations a0 and b1 and a relay line between the stations a0 and B are connected fixedly by writing and reading a signal in an edition area 13b of a storage memory 13 to a memory of a line editing switch section 11 by the command of a line edition device 52.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a line editing system for a digital exchange in a small-scale digital switching network.

In a telephone switching network, the number of transmission lines connecting exchanges is determined according to the amount of traffic, and changes in the number of lines due to switching routes in the event of a failure or changes in the number of lines due to increases or decreases in traffic are When the scale of the switching network is small, line editing is performed automatically by the switching unit network, and when the scale of the switching network is small, line editing is performed by acquisition.

Conventional line editing methods in digital switching networks are based on the PCMI next group even in small-scale cases, and even when line editing is done manually, the lines between exchanges are PCM multiplexed trunk lines, so voice 1 line (64Kbi
Editing in units of (t/S) is difficult, and currently there is no line editing method suitable for small-scale digital switching networks.

Regarding this line editing, we will take the PCM-24 system installed between a relay switching center and a local switching center as an example, and see Figures 1 and 2.
This will be explained with figures.

In FIG. 1, A and B are relay exchanges, r aq is a local exchange within the jurisdiction of the A office, and b, , b, . . . bm are local exchanges within the jurisdiction of the B office.

Now a. PCM multiplex transmission lines are provided between stations B and B, and between stations A and B, and the number of multiplex transmission lines between aO and B is 30.
Relay line between station-B and 10 stations-b+ via station B
It is assumed that it is used as a direct line between open stations. This line capacity also covers the traffic between aQ station and B station as well as 8
It is assumed that the traffic between stations 0 and b1 is appropriate.

As a specific example, as shown in Figure 2, there is a P between 10 stations and B station.
A CM-24 transmission system is installed with 120 lines in 5 systems, including 10 stations, 96 lines in 4 systems in station B, and 24 lines in 1 system between stations.

By the way, a. Station = b1 The traffic on the direct line between stations increases, so a. Station = b 2 systems and 48 lines are required between each station. To deal with this, we added backup system 1 between station B and station b1, resulting in 2 systems with 48 lines, and a
(Relay lines between stations 1 and B will be reduced by 1 system, resulting in 72 lines for 3 systems.

In addition, for the direct line between the stations a and B between the stations an and b1, 24 lines per system are increased to 48 lines for 2 systems.
As a line, it was decided that the B station would be connected to the above-mentioned B--b and backup system between the stations.

The above is an example of a simple line editing between three stations: 80 stations, BL station, and B station, but in reality, the line editing work is quite complicated.
In Japan's public switched telephone network, an advanced line editing method is used in which switching devices are installed in the ingress and egress routes, which are the multi-room transmission paths of each exchange, and these switching devices are operated in conjunction using a common line signaling system. It is being

In addition, in small-scale networks, lines are edited manually.

However, in none of these cases has there been a line editing function in units of one voice line (64 Kbit/S), which is optimal for small-scale digital switching networks.

The present invention uses a part of the highway of a digital exchange and provides a circuit editing function to create a single voice line (64Kbit/S) that is optimal for small-scale digital exchange networks.
) The object of the present invention is to provide a new line editing method for a digital exchange that can perform line editing in units of ( ).

The following two aspects of the present invention will be explained with reference to the drawings. FIG. 3 is a block diagram showing one embodiment of the present invention.

10 is the time switch section of the digital exchange, 11 and 1
2 is a line editing switch section and an exchange switch section of the time switch section 10; 13 is a holding memory;

21 to 2N are incoming highways, 31 to 3N are outgoing highways, 41 to 4N are interface circuits with PCM multiplex transmission lines and subscriber circuits, and 50 is a line editing switch section 11.
51 is an individual signal receiving and distributing device that receives the connection information CI and writes it into the switch holding memory 13 and instructs the readout; 52 is a switch holding memory that receives the line editing information RI'& This is a line editing device that instructs writing and reading to 13.

Hereinafter, the digital relay exchange installed at station B described in FIGS. 1 and 2 will be explained as an example.

An interface circuit 41 for configuring a relay line with the aQ station is connected to the input highway 21. It is connected to the 2-line editing switch unit 11 via the output highway 31, and is also connected to the interface circuit 42.
．． 43, a direct line between the ao station and the bt station via the B station is created. These interface circuits 42, 43 are connected to the highway 22.43, respectively. Outbound Highway 32 and Inbound Highway 23. It is connected to the line editing switch unit 11 via the output highway 33.

Relay lines within the jurisdiction of the own station and subscriber lines accommodated by the own station that do not require line editing are accommodated in the exchange switch unit 12. For example, the relay line between the B station and the bl""'-bm station is connected to the interface circuits 44 to 4MIC.

Husband Highway 26. Exchange switch section 1 via Exit Highway 36 - Exit Highway 2M and Exit Highway 3M
Connected to 2.

In addition, the connection trunk 50 is connected to the input highway 24 on the side of the 2-line editorial department switch section 11. It is connected to the line editing section switch 11 and the exchange switch section 12 by an output highway 34 and an input highway 25° on the side of the exchange switch section 12 and an output highway 35.

The switching operation and line editing operation of the digital relay exchange of station B configured as described above will be explained.

The exchange operation is performed by changing the exchange area 13a of the holding memory 13 to the input highways 26 to 2N and the output highway 36 according to instructions from the individual signal reception and distribution device 51 that receives connection information signals for each call.
. . 3N is executed by writing to and reading from a memory (not shown) of the exchange switch unit 12. Similarly, the input highway 25° and the output highway 3 on the exchange switch section 12 side of the connecting trunk 50
Similar exchange operations are performed for 5 under the control of the 9 individual signal reception and distribution device 51.

The line editing operation is performed according to instructions from the two-line editing device 52, and the holding memory 130 editing area 13b is
3. The connections between the lines accommodated in the output highways 31 to 33 are written in a memory (not shown) of the line editing switch section 11.

By reading the direct line between aQ station=b1 station and a. - A fixed connection of the trunk line between stations B is established.

Furthermore, the ratio of the number of lines mentioned above may be changed depending on the traffic volume of separately managed stations, etc. 2.
This is performed in conjunction with the line editing switch sections of the 1 station and BL station.

Similarly, the input highway 24 on the line editing switch section 11 side of the connection trunk 50. Outbound highway 34 is 2-line editing device 5
The connection operation is performed under the control of No. 2.

In the above-described embodiment, the two-line editing switch section 11 and the exchange switch section 12 were described as separate units, but in practice, a part of the exchange switch section is used as the line edit switch section.

Therefore, the line editing operation is similar to the exchange operation for one audio line (
This can be done in units of 64 Kbit/S).

As described above, the line editing method of a digital exchange according to the present invention divides the time switch section of the digital exchange into an exchange switch section and a line editing switch section, and divides the holding memory into an exchange area and a line editing area, respectively, to create two lines. The line editing information from the network management station is written and read by the line editing device into the line editing switch unit via the line editing area of the holding memory for the ingress/egress highway group connected to the predetermined transmission line accommodated in the editing switch unit. Since this line editing operation can be performed in units of one voice line (64 Kbit/S) in the same way as the switching operation, it is similar to line editing of a digital switch in a small-scale digital switching network. Perfect for operation.

[Brief explanation of the drawing]

FIGS. 1 and 2 are configuration diagrams explaining line editing. FIG. 3 is a block diagram of one embodiment of the present invention. A, B...Relay exchanges pao, bl-bm...
Local exchange, 10... time switch section of digital exchange. DESCRIPTION OF SYMBOLS 11... Line editing switch section, 12... Exchange switch section, 13... Holding memory, 13a... Exchange area. 13b...Editing area, 21-2N...Entering highway. 31-3N...Output highway, 41-4N...Interface circuit, 50...Connection trunk, 51...
Individual signal reception distribution device, 52... line editing device, CI...
...Connection information, RI...Line editing information. Patent applicant Japan Radio Co., Ltd. Figure 2 11 Rod Figure 3 Holder

Claims (1)

[Scope of Claims] A time switch section of a digital exchange is divided into an exchange switch section and a line editing switch section, and a holding memory is divided into an exchange area and a line editing area. In the above-mentioned exchange switch section, the exchange connections between the lines accommodated in the individual highway group and the outbound highway group of this exchange switch section are exchanged in the holding memory by a signal distribution device that receives connection information signals for each call. This is done by writing to and reading from the exchange switch section through the area. A fixed connection is established by writing and reading line editing information from the station to the line editing switch section via the line editing area of the holding memory using the line editing device, and connecting the input/output highway group of the exchange switch section to the line editing switch. A line editing system for a digital exchange, characterized in that interconnection with a group of ingress/egress highways is performed via a connection trunk housed on the side of the exchange switch.