JPH0257028A - System for accommodating primary group interface subscriber lines - Google Patents

Abstract

PURPOSE:To make an exchange module small in size by connecting a signal channel with a signal device, which is set to a first mode, and connecting a calling channel with a signal device which is set to a second mode. CONSTITUTION:Primary group interface subscriber line 2-1 and 2-2 are received through a transmitting path termination device 21 to a channel device 11 directly. When a D-channel 2d is provided, the D-channel 2d is connected through a channel p in the channel device 11 to a channel corresponding signal control part 161 (100) which is set to a first mode 100. Then, a B-channel 2b is connected through a channel p in the channel device 11 to a channel corresponding signal control part 161 (200) which is set to a second mode 200. Thus, it is prevented that a signal device 16 (100) to be set to the first mode 100 is unnecessarily provided in correspondence to the primary group interface subscriber line 2 which does not equip the D-channel 2d. Then, the exchange module can be made small in size.

Description

[Detailed Description of the Invention] [Summary] Regarding a system for accommodating primary group interface subscriber lines accommodated in a service integrated digital network and a packet switching network in a switching module that connects primary group interface subscriber lines and a packet switching network, The purpose is to enable the effective use of signaling equipment when the interface subscriber line does not include a signaling channel, and it has multiple digital communication channels and, if necessary, the same communication speed as each communication channel. a switching module accommodating a primary group interface subscriber line with a signaling channel and a packet-to-packet network line connecting the primary group interface subscriber line to a packet switching network; a first mode in which signal control of the data link layer is performed on information transmitted via a communication channel, and a second mode in which signal control of the data link layer is performed on information transmitted via a speech channel. and a third mode in which data link layer signal control is performed for information transmitted via a packet-to-packet network line; A signaling device set to the communication channel mode, a signaling device set to the second mode, and a signaling device set to the pakeso I-network line and the third mode, respectively, to the communication channel and the second mode. A communication path device connected by a communication path having the same communication speed as the signal channel is provided.

[Industrial application field]

The present invention is housed in the Zahis integrated system.
This invention relates to a system for accommodating primary group interface subscriber lines in a switching module that connects secondary group interface subscriber lines and a bucket switching network.

Leahis comprehensive digital km (Integrate)
d 5servicesl) 1g1tal Netw
As one of the interfaces between ork
channel), and a communication channel (hereinafter referred to as D channel) that has the same communication speed (64 km/sec) as each B channel and is used commonly by each B channel.
and a primary group interface (e.g. 23 I3
+D) is the International Telegraph and Telephone Consultative Committee (CC1i"T)
) specified in the Recommendation.

Furthermore, when using multiple primary group interfaces of this type, the D channel provided by a specific primary group interface is shared by the multiple primary group interfaces, and the other primary group interfaces are dedicated to 13 channels (24B in the previous example).
It is also stipulated that

In addition, as a protocol in the data link layer (layer 2) when transmitting packets via the B channel and the D channel, CCI is used for the B channel.
LAPB (Lin
k Access Procedure Ba1an
ced), but also L A I) for the D channel.
L A P D (Link Acc
Ess Procedure on the I)-c
hannel) is defined.

On the other hand, switching modules are used to accommodate I-interface subscriber lines, including primary group interface subscriber lines, into existing telephone and packet-switched networks.

[Conventional technology]

FIG. 4 is a cabinet showing an example of a conventional exchange module.

In FIG. 4, there is a primary group interface subscriber line 2-1 comprising 23 channels 13 channels 2b and 1 D channel 2d each having a communication speed of 64 kilobits per second, and 24 channels 13 channels 2-1 and 24 channels each having a communication speed of 64 kilobits per second. 2b - next group interface subscriber line 2-2,
The communication line 3, which is accommodated in the communication line apparatus 11 via the transmission line termination apparatus 21 and the primary group ink face signal apparatus 13 and is connected to the Pageno I exchange network (not shown), is connected to the packet communication network. It is accommodated in the communication path device 11 via the termination device η31.

Furthermore, an I3 channel signaling device 14 and a bagge-soto network signaling device 15 are connected to the communication path device 11.

- The next group interface signaling device 13 performs data link layer signal control on frames containing exchange control signals and packets transmitted via the D channel 2d in the -next if interface subscriber line 2-1. execute,
Frames containing packets transmitted via the B channel 2b are transferred without performing any signal control.

The B channel signaling device 14 also connects the B channel 2b within the primary group interface subscriber line 2 via the channel device 11.
In addition, permanent virtual circus (PVC) format and virtual circus (VC)
) format, connection is made each time a call is set up, and B channel 2
Data link layer signal control is performed on frames including packets transmitted via b.

Further, the packet-to-packet network signaling device 15 is fixedly connected to the packet-to-packet network line 3 via the communication channel device 11, and transmits data to frames containing packets transmitted via the packet-to-packet network line 3. Executes link layer signal control.

[Problem to be solved by the invention]

As is clear from the above description, in a conventional switching module, the primary group interface signaling device 13 is connected to the primary group interface subscriber lines 2 1 and 2-2.
were directly connected, and a B channel signaling device 14 was connected via the channel device 11.

However, when the primary group interface subscriber line 2-2 is equipped with a B channel 2b, the primary group interface signal device 13 provided for the next group interface subscriber line 2-2 is unnecessary. There was a problem.

SUMMARY OF THE INVENTION An object of the present invention is to enable effective use of a signaling device when the primary group interface subscriber line does not include an I] channel.

[F stage to solve the problem]

FIG. 1 is a diagram showing the principle of the present invention.

In FIG. 1, 2 is a primary group interface subscriber line comprising a plurality of digital communication channels 2b and, if necessary, a signal channel 2d having the same communication speed as each communication channel 2b; 3 is a primary group interface subscriber line; This is a line to the Pakesho 1-network that connects the primary group interface subscriber line 2 to the Bakeso 1-switching network.

16 is a signaling device provided according to the present invention.

11 is a communication path device provided according to the present invention.

100, 200 and 300 are the first mode, second mode and third mode set in the signaling device 16 according to the present invention.

[Effect]

Since the signal channel 2d has the same communication speed as the communication channel 2b, the communication path device 1
1 to a signaling device with the same configuration and resetting the signal control method of the data link layer as appropriate.

Based on this point of view, the signaling device 16 has a first mode 100 in which signal control of the data link layer is performed on information transmitted via the signal channel 2d of the primary group interface subscriber line 2, and a communication channel 2b. a second mode 200 for performing data link layer signal control on information transmitted via the packet-to-packet network line 3; and a data link layer signal control for information transmitted via the packet-to-packet network line 3 It can be set to any of the third mode F300.

The channel device 11 has a signal channel 2d and a first mode 1.
00, the signaling device 16 is set to the communication channel 2b and the second mode 200, and the signaling device 16 is set to the packet-to-packet network line 3 and the third mode 300. are connected to the communication channel 2b and the signal channel 2d by the same communication path (three speeds), respectively.

Therefore, for a primary group ink-face subscriber line that is equipped with a communication function but does not have a signal channel, a signaling device set to the first mode will not be connected, and an unnecessary signaling device will be connected. This prevents the replacement module from being installed, and promotes economicalization and miniaturization of the exchange module.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a diagram showing a switching module according to an embodiment of the present invention, and FIG. 3 is a diagram illustrating the signaling device in FIG. 2. Note that the same reference numerals indicate the same objects throughout the figures.

In FIG. 2, the communication path device 11 of the exchange module 1 includes 23 B channels 2b and 1 D channel.
A primary group interface subscriber line 2-1 having a channel 2d and a primary group interface subscriber line 2-2 having only a 24-channel B channel 2b are directly accommodated via a transmission line termination device 21, respectively. A packet-to-packet network line 3 is accommodated via a packet-to-packet SO I-W4 terminal device 31, and a signaling device 16 is further connected.

In FIG. 3, the signal device 16 includes a plurality of channel compatible signal control units 161 and each channel compatible signal control unit 161.
a common control section 162 provided in common to the channel device interface 163 that connects each channel corresponding signal control section 161 to the communication path device 11; A processing device interface 164 is provided to connect to the processing device interface 164.

Each channel corresponding signal control unit 161 includes a processor (M
PU) 1611, primary group Infunis subscriber line 2 D
For frames transmitted via channel 2d, L
A l) The L A P D program that executes signal control of the data link layer by I) and the data control by L A P B for frames transmitted via the B channel 2b of the primary group interface subscriber line 2. Execute link layer signal control 1, A I) F
3. LA I-' which executes signal control of the data link layer by L to Y 3 for frames transmitted via the program and the packet network 1 to network line 3.
B□Protaram memory 1612 for storing programs
Or is provided.

The processor (MPU) 1611 executes the APD program in the program memory 1612 based on instructions transmitted from the processing device 12 via the processing device interface 164.
, LAPB, second mode 200 without running the program
, and a third mode 300 for executing the I7A P B z program.

Prior to operating the exchange module 1, the signal control unit 161 corresponding to each channel in the signaling device 16 operates in the first mode 1.
The mode is set to any one of modes 00 to 300.

Furthermore, the processing device 12 transmits the transmission path V! The D channel 2d in the primary group inkface subscriber line 2 accommodated via the end device 21 and the channel corresponding signal control unit 161 (100) set to the first mode 100 in the signal device 16,
The packet-to-packet network line 3 connected by a fixed communication path p1 in the communication path device 11 and accommodated via the packet-to-packet network termination device 31 and the third mode in the signaling device 16 1ζ 300 is connected to the channel compatible signal control unit 161 (300) by a communication path p3 fixedly set in the communication path device 11, and further connected to the primary group interface connection lines 2-1 and 2-2. B channel 2b in
and the channel compatible signal control unit 161 (200) set to the second mode 200 in the signaling device 16, either fixedly (in the case of PVC format) in the channel device 11 or each time a call is set up (VC type) connection is made using the set communication path p2.

In such a state, frames arriving from the D channel 2d in the next group interface subscriber line 2 are sent to the communication path device]
The channel-compatible signal control unit 161 (set to the first mode OO) via the communication path p fixedly set in the first mode OO via the communication path device interface 163 in the signal device 6 100).

In the channel corresponding signal control section 161 (100),
A high-level data link controller (1 (DLC
> 1614 and processor (MPIJ) 1611
is LA for the frame arriving from D channel 2d.
After performing the signal control of the delink layer based on the PD, the signal to the bucket 1 is transmitted to the processing device 12 via the processing device interface 164.

On the other hand, the primary group interface subscriber line 2-1 or 2-
Frames arriving from the B channel 2b in the communication path device 11 pass through the communication path p2 which is set either fixedly (in the case of PVC format) or each time a call is set up (in the case of the VC format) in the communication path device 11. The signal is transmitted via the channel device interface 163 in the signal device 16 to the channel corresponding signal control section 161 (200) which is set to the second mode 200.

The channel compatible signal control unit 161 (200) includes a processor (MPLI) 1611 and a high level data link controller (HDLC) 1614.
is LA for the frame arriving from B channel 2b.
After performing the PB-based signal control, the packet is communicated to the processing device 12 via the processing device interface 164.

The processing device 12 adds header information necessary for transmitting the packet to a packet switching network (not shown) to the packet transmitted from the channel compatible signal control unit 161, and then adds the header information to the packet transmitted from the channel corresponding signal control unit 161 to the third packet in the signal device I6. The signal is transmitted to the channel corresponding signal control unit 161 (300) set to mode 300 via the processing device interface 164.

The channel corresponding signal control unit 161 (300) performs I5A P 13 on the packet transmitted from the processing device 12.
After executing signal control based on the frame, the communication path device ink face 163, the communication path p3 fixedly set in the communication path device 11, and the packet-to-packet network termination device 3 are displayed as frames.
1 to the packet network line 3.

Note that when a frame arriving from the packet-to-packet network line 3 is transferred to the D channel 2d or B channel 2b in the primary group interface subscriber line 2-1 or 2-2,
Shingetsu control is executed in the same process as described above, so the explanation will be omitted.

As is clear from the above description, according to this embodiment, the primary group interface subscriber lines 2-1 and 2-2 are directly accommodated in the communication path device 11 via the transmission path termination device 21,
When the D channel 2d is provided, the channel corresponding signal control unit +61 is set to the first mode 100.
(100) via the communication path p1 in the communication path device 11, and the B channel 2b is connected to the channel corresponding signal control unit 161 (200) set to the second mode 200 in the communication path device II. Since the connection is made via the communication path p2, the signaling device 16 (100) set to the first mode 100 is not required, corresponding to the primary group interface subscriber line 2 not equipped with the D channel 2d. This will be prevented.

Note that FIGS. 2 and 3 are only one embodiment of the present invention, and for example, the configurations of the exchange module and the signaling device are not limited to those shown, and many other modifications may be considered. However, the effects of the present invention remain the same in either case.

〔Effect of the invention〕

As described above, according to the present invention, in the exchange module,
Signaling equipment set to the first mode will not be connected to primary group interface subscriber lines that are equipped with only communication channels and no signaling channels, thereby preventing unnecessary signaling equipment from being installed. This facilitates economicalization and miniaturization of the exchange module.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a diagram showing an exchange module according to an embodiment of the present invention, FIG. 3 is a diagram illustrating the signaling device in FIG. 2, and FIG. 4 is a diagram illustrating the conventional one. FIG. 3 is a diagram illustrating an example of a replacement module. In the figure, 1 is a switching network, 2.2-1 and 2-2 are primary group interface subscriber lines, 2b is a B channel, 2d is a D channel, 3 is a packet network line, 11
12 is a communication path device, 12 is a processing device, 13 is a primary group interface signal device, 14 is a B channel signal device, 15 is a packet-to-packet network signal device, 16 is a signal device, 21 is a transmission path termination device, and 31 is a packet-to-packet device. A network terminal device, 100 is a first mode, 161 is a channel corresponding signal control unit, 162
1 is a common control unit, 163 is a channel device interface, 1
64 is a processing device interface, 200 is a second mode, 300 is a third mode, 1611 is a processor (Mr.
'U) , ] 612 is the program memory, 1613 is the Hasofa memory (13M), 1614 is the high-level data link controller rP' - Chu Zhao's Seven Principles (2) 1st ■

Claims (1)

[Claims:] A primary group interface subscriber line comprising a plurality of digital communication channels (2b) and optionally a signaling channel (2d) having the same communication speed as each of the communication channels (2b). (2) and a packet-to-packet network line (3) that connects the primary group interface subscriber line (2) to a packet switching network, comprising: a signal channel of the primary group interface subscriber line (2); (2d) A first mode (100
), a second mode (200) for performing data link layer signal control on information transmitted via the speech channel (2b), and the packet-to-packet network line (3).
); a signaling device (16) that can be set to either a third mode (300) for performing data link layer signal control on information transmitted via the signal channel (2d); a signaling device (16) set to the first mode (100); a signaling device (16) set to the communication channel (2b) and the second mode (200);
, the packet-to-packet network line (3) and the third mode (
300) to the communication channel (2b) and the signal channel (2d), respectively.
A primary group interface subscriber line accommodating system characterized by providing a communication path device (11) connected by a communication path having the same communication speed as the primary group interface subscriber line accommodation system.