JPH10257534A - Housing system for subscriber circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To let an analog subscriber circuit (SLC) and a digital subscriber circuit (DLC) mixedly exist by providing an SLC common part for performing interface with a network, SLC and DLC and a DLC controller for processing DLC dedicated signals inside a shelf. SOLUTION: A DLC 6 divides a signal with a digital subscriber into an audio signal and a D channel signal and interfaces the audio signal with an SLC common part 3 while using the same data storage position as an audio channel to be used by an analog subscriber. It is enough for the SLC common part 3 to perform the same audio processing as an SLC 2 without caring of a DLC 6, namely, processing is enabled without caring of a subscriber class (digital/analog), and the audio channel of DLC 6 can be controlled without cost impact. Besides, the D channel signal peculiar for the DLC 6 is controlled while using a leased line (D channel dedicated interface 9) between a DLC controller 20 and the DLC 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subscriber circuit accommodating a subscriber circuit in which an analog subscriber circuit (SLC) and a digital subscriber circuit (DLC) can be accommodated in a mixed manner. About the system.

[0002]

2. Description of the Related Art A subscriber accommodated in an exchange is roughly classified into an analog subscriber and a digital subscriber.
At present, most subscribers in the exchange are analog subscribers. However, digital subscribers using ISDN (Integrated Services Digital Network) have increased in recent years.

In an exchange, a subscriber circuit (SLC) having a BORSCHT function is used to accommodate an analog subscriber.
And an SLC common part for controlling the same, and a back wiring board (BWB) for connecting the common part,
These are combined into an SLC shelf (SLCSH).

[0004] Here, the BORSCHT function is an acronym for a function required for a subscriber circuit, and B (B
battery feed), O (Ov
error: overvoltage), R (Ringing:
Ringing), S (Supervision: management),
The acronyms C (Codec: codec), H (Hybrid: hybrid), and T (Testing: test) are used.

FIG. 8 is a diagram showing an example of mounting a conventional shelf. In the figure, reference numeral 10 denotes a shelf, and power supply packages 1 are mounted on both ends thereof. Each power supply package supplies power to the 0-system and 1-system packages. 2 is a subscriber circuit (SLC) and 3 is an SLC common unit. S
The LC common part is duplicated and two cards are mounted.

FIG. 9 is a block diagram showing an example of the electrical configuration of a conventional shelf. 8 are denoted by the same reference numerals. The SLC common part 3 is duplicated,
The SLC 2 is connected to the SLC common unit 3. 4
Is a subscriber terminal connected to SLC2. This subscriber terminal 4 is a terminal that operates with an analog signal. The figure shows a case where the subscriber terminal 4 is a telephone and the signal exchanged between the subscriber and the exchange is voice.

[0007] 5 is a back wiring board (BWB)
There is a motherboard printed board (not shown) at the rear of the shelf shown in FIG.
Pattern wiring is performed. 6 is SLC common part 3
And the interface between SLC2.

[0008] Even if the subscriber is a digital subscriber,
Similarly, a digital subscriber circuit (DLC), a DLC common unit, and a BWB are required to be integrated as a shelf.

[0009]

Generally, SLC and D
There is a big difference in function from LC, subscriber circuit, common part,
Sharing the BWB and shelf was quite difficult in terms of cost. On the other hand, customers who use the switching system are required to switch from an analog subscriber to a digital subscriber.
Sometimes you want to avoid wasting the common part.

The present invention has been made in view of the above problems, and has as its object to provide a subscriber circuit accommodation system in which an analog subscriber circuit and a digital subscriber circuit can coexist. .

[0011]

[Means for Solving the Problems]

(1) FIG. 1 is a principle block diagram of the present invention. The same components as those in FIG. 9 are denoted by the same reference numerals. In the figure, 1
0 is a shelf, 3 is an SL provided in the shelf 10
This is the C common section. In the figure, the SLC common unit 3 is duplicated, but it is not always necessary to duplicate it. The S
The LC common unit 3 has a function of interfacing signals between the network and the shelf 10.

The shelf 10 is a network (not shown)
Is connected to Reference numeral 2 denotes an analog subscriber circuit (SLC) connected to the SLC common unit 3, reference numeral 6 denotes a digital subscriber circuit (DLC) mounted in the shelf 10, and reference numeral 20 denotes a connection to the DLC 6, and performs processing of a DLC dedicated signal. D
LC controller. 4a is a subscriber terminal connected to the SLC2, and 4b is a subscriber terminal connected to the DLC6.

In the figure, the DLC controller 20 is duplicated, but need not be duplicated. The D
The LC controller 20 is connected to the DLC 6 using the ISDN D channel. 7 is an SLC common part 3,
It is a back wiring board (BWB) that connects the DLC controller 20, DLC6, and SLC2. 8 is an SLC common unit 3, a DLC controller 20, an SLC
2 is an interface connecting DLC6. Although not shown, the D channel is also wired to the SLC2. This is because the SLC2 and the DLC6 can be freely mounted on the shelf.

Here, the D channel is a control signal for enabling the following functions. Incoming call directly to an extension without passing through an operator Number for designating destination communication equipment etc. Transmitting data transfer (128 byte unit) between terminals Searching for information such as telephone numbers In the present invention, analog subscribers An SLC common unit 3 is provided to support functions commonly required by digital subscribers. Here, the SLC common unit 3 is a part that interfaces signals between the network and the shelf 10.

Analog subscribers mainly perform only voice processing, while digital subscribers need to terminate voice processing and D-channel signals, and need to perform digital processing using a processor.

Therefore, processing for a digital subscriber is divided into voice processing common to analog subscribers and D-channel processing, and voice processing is performed using the same hardware (SLC common unit 3) as analog subscribers. Then, the other processing is performed by using DLC-specific hardware (DLC controller 20).

The shelf 10 is an analog subscriber (SLC)
With only the configuration, the DLC controller 20 is not necessary, and the processing can be performed only by the SLC common unit 3.
If the LC6 is required, both the SLC common unit 3 and the DLC controller 20 control the DLC6.

According to the present invention, as shown in FIG.
And DLC can be mixed. FIG. 2 is a diagram showing a mounting example of the shelf according to the present invention. In the drawings, the same components as those in FIGS. 1 and 8 are denoted by the same reference numerals. In this mounting example, the DLC controller 20 is mounted at the positions of the SLC 15 and the SLC 30 in FIG. 8 to constitute a duplex system. And SLC15 and SLC30
The SLC2 and the DLC6 can be mounted at any positions except for.

If the shelf 10 has only the analog subscriber circuit (SLC) 2 (see FIG. 8), the DLC
The controller 20 is not required, and processing can be performed only by the SLC common unit 3. If you need DLC,
D is applied to both the SLC common unit 3 and the DLC controller 20.
The control of LC6 will be performed.

According to the configuration of the present invention, the SLC common unit 3 for supporting functions commonly required by the analog subscriber and the digital subscriber is provided, and the digital subscriber (DL) is provided.
C) 6 is divided into voice processing that is common to analog subscribers and D-channel processing. Voice processing is performed using the SLC common unit 3 that is the same hardware as analog subscribers, and other processing is performed. By performing processing using the DLC controller 20, which is hardware dedicated to DLC, it is possible to provide a subscriber circuit accommodation system in which analog subscriber circuits and digital subscriber circuits can coexist.

(2) The SLC common part 3 and D
It is characterized in that communication between the LC controllers 20 is performed using an SLC audio channel. According to the configuration of the present invention, it is possible to mount the SLC in the DLC controller slot.

(3) Further, the voice signal of the digital subscriber and the control signal are set to different channels. According to the configuration of the present invention, the SLC common unit 3 only needs to perform the audio signal processing, and the subscriber type (digital / digital
Analog).

[0023]

Embodiments of the present invention will be described below in detail with reference to the drawings. First, the operation of the present invention will be described with reference to FIG. The DLC 6 divides the signal with the digital subscriber into a voice signal and a D channel signal, and interfaces the voice signal with the SLC common unit 3 using the same data accommodating position as the voice channel used by the analog subscriber. As a result, the SLC common unit 3
The same voice processing as that of the SLC 2 may be performed without being conscious of the LC 6, that is, the processing can be performed without being conscious of the subscriber type (digital / analog), and the voice channel control of the DLC 6 can be performed without cost impact. .

The D channel signal unique to the DLC 6 is
Control is performed between the DLC controller 20 and the DLC 6 using a dedicated line (D-channel dedicated interface 9). The DLC 6 is configured to be controllable when the SLC common unit 3 and the DLC controller 20 are mounted. Then, the SLC common unit 3 controls the audio part, and the DLC controller 20 processes a D channel control signal for the DLC 6.

The DLC 6 is synchronized with the SLC 2 and operates at the same timing. DLC6, SLC2
Are used by the SLC common unit 3. By matching the timing of the SLC common unit 3 with the timing of the DLC 6 and the DLC controller 20, it becomes unnecessary to increase the number of timing lines of the BWB 7 and to add a functional circuit for making the two timings follow in the DLC 6, thereby reducing costs. .

Since the DLC controller 20 operates according to the processor of the exchange, the DLC controller 20 must communicate with the exchange. Therefore, a signal from the exchange to the DLC controller 20 performs communication using the same accommodation portion as the voice channel of the SLC.

With such a configuration, the SLC
The common unit 3 can handle the DLC controller 20 in the same manner as the SLC 2. Therefore, if the DLC 6 is not mounted on the shelf 10 and only the SLC 2 is used, the SLC can be mounted also on the mounting position of the DLC controller 20, and the shelf slot is not wasted. FIG. 3 is a diagram showing a connection state of signals according to the present invention. 1 are denoted by the same reference numerals. The duplicated SLC common unit 3 has an analog subscriber circuit (SLC) 2 and a digital subscriber circuit (DL).
C) 6 and the DLC controller 20 are connected.

SLC common part 3, SLC2, DLC
6. Between the DLC controllers 20, C2Mx
x, MFCKxx, DSHWxx, and USHWxx. The signal line going to each SLC is
It is a physically different line, and C2M01 ~
C2M30, MFCK01 to MFCK30, DSHW0
1 to DSHW30 and USHW01 to USHW30.

DLC controller 20 and SLC2, DL
C6 is connected by two DCDHWxx and UCDHWxx, respectively. Each signal is DCDHW
01-DCDHW29, UCDHW01-UCDHW2
9 (excluding 15 each).

The DSHWxx has an SL from the network.
The voice going to C2 and the control bit (SD) for SLC are included. USHWxx contains the voice going from SLC2 to the network and the SLC status signal bits (SCN). DCDHWxx has DL from network
A control bit for C6 is included. Also, UCD
HWxx includes a status notification bit from the DLC 6 to the network.

FIG. 4 and FIG. 5 are explanatory diagrams of data storage of the SLC, and show the interface 8 used in the SLC mounting slot. For example, SLC01 and SLC08
2 shows the operation of two SLCs. FIG. 4 and FIG. 5 are connected at the point of.

In FIG. 4, (a) is a clock of 2 MHz, MFCK of (b) and (c) is a clock for determining the head of data, and DSHW of (d) and (e) is from the network to SLC (or DLC). Going data, USHW is SL
Data going from C (or DLC) to the network. The MFCK clock has a period of 2M2 once every 16 times. The reason is to indicate a break in units of 16 frames.

FIG. 5 is an enlarged view of the information from (a) to (e) after (f). (F) is a 2 MHz clock, (g) is MFCKW which is a clock for determining the head of data of SLC01, (h) is DSHW is SLC
01 from the network of SLC01 (or DLC), USHW of (i) is the SLC of SLC01 (or DLC).
LC) to the network. (J) MFCK of SLC08, (k) DSH of SLC08
W, (l) is the USHW of SLC08.

MFCK, USHW, DSHW, USHW
Indicates information of each of SLC01 and SLC02. D / USHW shown in the figure is a highway through which voice and control signals pass, and has a frame configuration. The signal forms a time slot (TS) with 8 bits as one unit,
Two TRs are used in one circuit (1CCT). 32
Each TS is taken as one unit to form one frame. One frame is 125 μsec.

On the other hand, SLC2 has 16 packages in one package.
A D / USHW signal transmits and receives audio and control signals for 16 circuits in one frame. DSH
W (Down Shelf High Way) is an HW (highway) containing a voice and a control signal from the switch body to the SLC2, and outputs a voice using an even-numbered TS and a control signal using an odd-numbered TS. Has been sent. Note that two of TS0 and TS1 are used by the 0th line mounted on SLC2, and TS30 and TS31 are sequentially set to 1
The fifth line will be used.

The audio signal is an 8-bit PCM, and the control signal is composed of a 4-bit SD signal, a 2-bit HK, and a 2-bit PLT signal. The SD signal is a control signal for instructing the telephone terminal 4 to ring a bell or sending a billing signal. For example, SDa is a bit for notifying the presence or absence of ringing, SDb is a bit for notifying the presence or absence of test pull-in, SDc is a bit for notifying the presence or absence of polarity inversion, and SDd is a bit for notifying the presence or absence of billing.

The HK (House Keeping) signal is an internal state control signal of the SLC 2 such as a loss setting inside the SLC. The PLT (Pilot) signal has a PLT0 bit fixed to “0” and a PLT
The LT1 bit is fixed at "1".

The control signals SD and HK are negative polarity signals. Here, the negative polarity indicates that the bit becomes significant when it is at the “L” or “0” level. As shown in the figure, the time slot TS0 of SLC01 is a voice channel, and is composed of 8 bits from bit1 to bit8. The time slot TS1 of the SLC01 is a control channel, and the SD4 bits, HK2 bits,
It consists of 2 bits of PLT.

On the other hand, SCN is used as a control bit in the case of data transmitted from the SLC 2 to the network. USHW01 is delayed by one bit of 2 MHz from DSHW01. The reason is that, for example, when making a test jig having the same function as that of the SLC, it is impossible to turn the data back in the same time.

On the other hand, for SLC08, the TLC of SLC01
TS31 comes to the time slot corresponding to S0, and SL
TS0 has arrived at a time slot corresponding to TS1 of C01.

Thus, when accommodating SLC data, information of 8 bits of audio channels and 8 bits of control channels per channel is transmitted from the SLC2 to the switch or from the switch to the SLC2 regardless of the DLC. A normal operation can be performed.

FIG. 6 and FIG. 7 are explanatory views of the data accommodation of the DLC according to the present invention, showing the interface 8 used in the DLC mounting slot. 4 and 5 are denoted by the same reference numerals. FIG. 6 and FIG. 7 are connected at the points of,.

In FIG. 6, (a) is a clock of 2 MHz, MFCK of (b) and (c) is a clock for determining the head of data, and DSHW of (d) and (e) is from the network to SLC (or DLC). Going data, USHW is SL
Data going from C (or DLC) to the network. The MFCK clock has 2 cycles of 2 MHz once every 16 times.

FIG. 7 is an enlarged view of the information from (a) to (e) after (f). (F) is a clock of 2 MHz, (g) is MFCKW which is a clock for determining the head of data of SLC01, and (D) is DLCW of SLC01.
08 from the network to the SLC (or DLC), (I) USHW is the SLC (or D
LC) to the network. (J)
Is DSHW of SLC08, (k) is US of SLC08
HW.

Here, the state of data accommodation of DLC08 is shown. In the case of DLC, data is transferred using the SLC voice channel, and control information is exchanged between the DLC controller 20 and the DLC 08 using the D channel for control information. In addition, data is transferred using an audio channel in an even-numbered TS of a time slot (TS), and control information is transferred using an odd-numbered channel.

In DLC08, only audio signals are handled in DSHW and USHW. Therefore, the SD, SCN, and HK signals that existed in FIGS. 4 and 5 do not exist. Where D
SHW and USHW stack monitoring is required, PLT
0, PLT1 exists. In the figure (h), PLT0 =
0, indicates that PLT1 = 1.

In the figure, USHW01 is delayed by one bit compared to DSHW01 because it is impossible to return at the same time. A control signal (corresponding to SD, SCN, and HK in FIGS. 4 and 5) for DLC 6 is DLC
DCDH which is a separate line from the controller 20 (see FIG. 1)
W, UCDHW.

[0048]

As described in detail above, according to the present invention, (1) when an analog subscriber circuit (SLC) and a digital subscriber circuit (DLC) are mixedly mounted on a shelf, Network and SLC in the shelf
And an SLC common unit for interfacing with the DLC and a DLC controller for processing the signal for the DLC, thereby providing an SLC common unit for supporting functions commonly required by analog and digital subscribers, For digital subscribers (DLC),
Voice processing is divided into D-channel processing and voice processing that is common to analog subscribers. Voice processing is performed using the SLC common unit, which is the same hardware as analog subscribers, and other processing is performed using DLC-specific hardware. By processing using a certain DLC controller, it is possible to provide a subscriber circuit accommodation system in which analog subscriber circuits and digital subscriber circuits can coexist.

(2) The SLC common part and the DL
By performing the communication between the C controllers on the SLC voice channel, the SLC
Can also be mounted.

(3) Further, by using different channels for the voice signal of the digital subscriber and the control signal, the SLC common section only needs to perform the voice signal processing, and is conscious of the subscriber type (digital / analog). The processing can be performed without any processing.

As described above, according to the present invention,
It is possible to provide a subscriber circuit accommodation system in which analog subscriber circuits and digital subscriber circuits can coexist.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing a mounting example of a shelf according to the present invention.

FIG. 3 is a diagram showing a connection state of signals according to the present invention.

FIG. 4 is an explanatory diagram of data storage of SLC.

FIG. 5 is an explanatory diagram of data accommodation of SLC.

FIG. 6 is an explanatory diagram of DLC data accommodation.

FIG. 7 is an explanatory diagram of DLC data accommodation.

FIG. 8 is a diagram showing a mounting example of a conventional shelf.

FIG. 9 is a block diagram illustrating an example of an electrical configuration of a conventional shelf.

[Explanation of symbols]

 2 analog subscriber circuit (SLC) 3 SLC common part 4a subscriber terminal 4b subscriber terminal 6 digital subscriber circuit (DLC) 10 shelf 20 DLC controller

Claims (3)

[Claims] An analog subscriber circuit (SL) is provided on a shelf.
C) and a digital subscriber circuit (DLC) in a mixed manner, an SLC common unit for interfacing a network with SLC and DLC, and a DLC controller for processing a DLC dedicated signal in the shelf. An accommodation system for a subscriber circuit, comprising: 2. The subscriber circuit accommodation system according to claim 1, wherein the communication between the SLC common unit and the DLC controller is performed by using an SLC voice channel. 3. The subscriber circuit accommodation system according to claim 1, wherein the voice signal of the digital subscriber and the control signal are set to different channels.