JP2906848B2 - ISDN subscriber line control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION This invention relates to ISDN subscriber line control system, related to ISDN subscriber line control system in ISDN exchange, in particular to place the D channelization le Layer 2 or more processing devices downstream of the line concentration switch.

[0002]

2. Description of the Related Art Conventionally, in an ISDN exchange in which this kind of signal processing device is provided after a concentrator switch, layer 1 control and failure processing of a subscriber line are executed independently of layer 2 or higher processing. Was reflected in the processing. For the D channel, the processing device is provided after the concentrator switch. However, it is rare that the signal processing device of the D channel to be used is determined by activating the layer 1 and the concentrator switch is controlled and connected. Because the D channel is always used while connected and operating, the connection information of the D channel is set by the data such as the station data, and the D-channel-corresponding line switch is set at the time of initial setting such as system restart. .

[0003]

In this conventional ISDN exchange, it is meaningful to connect the D channel processing device by detecting the activation of layer 1;
In other cases, since the D-channel signal processing device and the subscriber circuit are controlled independently, there has been a problem that the control program becomes complicated and the processing amount increases. Also, D
In a switching system in which the signal processing device of the channel is mounted at the same position as the subscriber circuit, the above problem is eliminated, but since the information of the D channel comes out from the subscriber circuit, the mounting becomes large and the Signal exchange becomes complicated, and further, there is a problem that a configuration in which an analog subscriber and an ISDN subscriber are mixedly mounted on a device equipped with a subscriber circuit cannot be provided.

[0004]

According to the present invention , an ISD is provided .
And have you the ISDN exchange that consists in downstream to concentrator of the subscriber line a signal processing unit for the Layer 2 or more processing D channel signals in N user network interface, I
Terminates layer 1 of the SDN subscriber line and provides two B channels.
And a subscriber circuit that separates one D channel from the
An activation signal of the layer 1 detected by an entry circuit
Signal and fault information in the same time
A first multiplexing device for multiplexing into lots and one time slot
The transmission D-channel and the subscriber
A first demultiplexer for demultiplexing a control signal of the circuit;
A concentrator switch capable of controlling connection in units of 64 kbps,
The D channel multiplexed after the concentrator switch
And activation signal and fault information of the layer 1
A second demultiplexing device for demultiplexing the concentrators,
H, the transmission D channel and the subscriber circuit
And a second multiplexing device for multiplexing the control signals of the above (1) to (3) .

[0005]

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the ISDN subscriber line control system of the present invention.

In FIG. 1, a subscriber circuit (hereinafter, LC) terminates layer 1 of an ISDN subscriber line and separates two B channels and one D channel. The separated receiving D channel, the activation signal of layer 1 and the failure information are multiplexed in the same time slot by a multiplexer (hereinafter, MX) 2 and connected to a concentrator switch (hereinafter, LSW) 4. The LSW 4 is connected by a call control device (CPR) 9 at the time of initial setting based on the connection information of the D channel. MX via 64 kbps communication path on LSW4
The signal sent from 2 is a demultiplexer (hereinafter referred to as DX) 5
Connected to. DX5 demultiplexes the received signal,
The received D-channel signal is connected to a port for processing the D-channel of a signal processing device (hereinafter, SPR) 7, and the layer 1 activate signal and fault information are connected to an input port. Conversely, the D channel signal output and the subscriber circuit control signal output sent from the SPR 7 are multiplexed by the MX 6 and connected to the DX 3 via a 64 kbps communication path on the LSW 4. D
In X3, the received signal is demultiplexed and the D channel signal is L
The subscriber circuit control signal is applied to the D channel transmission port of C1 as L.
Connected to the control port of C1.

The operation when a call using the B channel is issued from a subscriber will be described. The message of D channel is separated by LC1, MX2, LSW
4, DX5 to SPR7. SPR7 is C
Performs processing by communicating with PR9, and outputs the result to MX6, LSW
4, DX3, LC1 to the subscriber. Based on the call control information, the CPR 9 uses a time-division switched communication channel (hereinafter, TDS
W) The communication path is set on 8 and LSW 4 and the connection process is performed by connecting the B channel from the terminal.

Next, when a fault occurs in the ISDN subscriber line or when the layer 1 is deactivated, the fault is detected in the LC1, and the MX2, LS
SPR7 is notified via W4 and DX5 and processed. Conversely, when deactivating Layer 1 from the exchange side, a control signal is output from SPR7 and MX6, L
Processing is performed by controlling LC1 via SW4 and DX3.

[0010]

As described above, the present invention provides an ISDN
Ray of D channel signal in user network interface
A signal processing device that performs more than two processes
ISDN exchange, which is configured after the
Two B channels with Layer 1 termination of DN subscriber line
When a subscriber circuit for separating a single D channel, a first multiplexer for multiplexing an activate signal and fault information of the layer 1 which is detected by the subscriber circuit to the receiving D channel in the same time slot, one time Multiplex on slot
Multi control signal of the subscriber circuit and transmitting D channels have been
The first demultiplexer that performs demultiplexing, in units of 64 kbps
A concentrator switch that allows connection control , and
D channel multiplexed in the later stage and layer 1 activity
Second multiplex for demultiplexing the base signal and fault information
Separation device and transmission D channel after the concentrator switch
And a second multiplexer for multiplexing the control signal of the subscriber circuit.
By providing , the connection information of the concentration switch
It has the effect that the management of the subscriber Ri Do allows centralized and subscriber circuit are collectively controlled at the control unit for the Layer 2 above processing. It further preceding line concentration switch only exists only the end of the layer 1, because as the interface with the line concentration switch is only 64kbps call path has the effect of easily configured even when the apparatus mixed analog lines.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of an ISDN subscriber line control system according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Subscriber circuit (LC) 2, 6 Multiplexer (MX) 3, 5 Demultiplexer (DX) 4 Concentrator switch (LSW) 7 Signal processor (SPR) 8 Time division switching path (TDSW) 9 Call controller (CPR)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04Q 11/04 H04M 3/22 H04Q 3/42

Claims (1)

(57) [Claims] 1. A Ru is configured by post signal processing device for a layer 2 above processing of D channel signals to the concentrator of a subscriber line in an ISDN user network interface ISD
And have you in the N exchange, the end of the layer 1 of the ISDN subscriber line
To separate two B channels and one D channel
A subscriber circuit and the layer detected by the subscriber circuit
1 and the reception signal
First multiplexer for multiplexing in the same time slot as channel
And the transmission D multiplexed in one time slot.
Demultiplexing a channel and a control signal of the subscriber circuit.
Connection control possible with one multiplexing / demultiplexing device in 64 kbps units
And a multiplexed switch after this switch.
Activated D channel and Layer 1
Second demultiplexing device for demultiplexing signal and fault information
And the transmission D channel at a stage subsequent to the concentrator switch.
And a second multiplexing unit for multiplexing the control signal of the subscriber circuit with the channel.
ISDN subscriber line control system, characterized in that it comprises a device.