JPH0460398B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention provides a method for connecting subscriber lines of different subscriber classes (for example, analog subscriber lines, digital subscriber lines, etc.) to the same line concentrator in a time division exchange. This invention relates to a subscriber class identification control method for economically identifying each subscriber class and controlling the subscriber circuits.

[Background of the invention]

In recent years, with the advancement of digital technology and the increasing demand for non-telephone services such as facsimile communication services, data communication services, and image communication services, subscriber lines are also being digitized to meet the social demands mentioned above. There is a trend toward

FIG. 1 is a configuration diagram of an example of a conventional digital subscriber line exchange, in which 1a to 1n are analog line concentrators that accommodate analog subscriber lines;
is a digital line concentrator and simultaneous division/distribution device that accommodates digital subscriber lines that provide non-telephone services.

Here, each of the above line concentrators 1a to 1n, 2a to 2n
The subscriber line capacity is determined by economical multiplicity from the perspective of multiprocessing technology, division loss (which increases when subscriber line capacity is reduced), and cost increase per terminal when capacity decreases (subscriber line capacity). For example, a subscriber line capacity of 1024 subscribers is selected.

In this conventional example, in the initial stage of introduction of non-telephone services, if there is demand for digital subscribers, albeit a very small number, the analog line concentrator 1a
Even if there is a vacant terminal in ~1n, the required number of digital line concentrators 2a~2n must be installed, and conversely, if the actual number of analog subscribers decreases due to the progress of digitization of subscriber lines, existing analog There were disadvantages such as the occurrence of vacant terminals in the line concentrators 1a to 1n, which became uneconomical.

[Purpose of the invention]

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, accommodate subscriber lines of different subscriber classes in the same line concentrator, economically identify each subscriber class, and control subscriber circuits. The object of the present invention is to provide a subscriber class identification control method that can perform the following functions.

[Summary of the invention]

The configuration of the subscriber class identification control system according to the present invention includes each subscriber circuit where various subscriber lines are terminated, and a signal receiving device and a signal transmitting device corresponding to each subscriber class, In a time-division exchange concentrator that connects these through up and down signal highways, a subscriber class identification signal applied to each subscriber circuit can be transmitted from each subscriber circuit through the up signal highway. Accordingly, the corresponding signal receiving device and signal transmitting device are selected, and the control signals for the subscriber circuit are controlled to be received and transmitted via the up and down signal highways.

[Embodiments of the invention]

Embodiments of the present invention will be described below based on the drawings.

FIG. 2 is a block diagram 3 of an embodiment of a line concentrator using a subscriber class identification control system according to the present invention.
The figure is a signal allocation diagram of the signal highway.

Here, 101a to 101n are analog subscriber lines 102a to 102n are digital subscriber lines, 103a to 103n are analog subscriber circuits, 104a to 104n are digital subscriber circuits, 105 is an upstream communication highway, and 106 107 is a downstream communication highway, 107 is an upstream signal highway, 108 is a downstream signal highway, 109 is an upstream time switch, 110 is a downstream time switch, 111 is a received signal distribution circuit 112 is a signal corresponding to the analog subscriber class. a receiving device; 113, a signal receiving device compatible with the digital subscriber class; 114, a transmission signal selection circuit; 115, a signal transmitting device compatible with the analog subscriber class; 116;
is a signal transmitting device compatible with the digital subscriber class.

This line concentrator is capable of accommodating up to 1024 digital subscriber lines and analog subscriber lines in total, but this number and subscriber type class are not limited to the above. A coexistence of two or more types of subscriber classes does not impede implementation of the present invention.

Each subscriber (corresponding to a subscriber line) has subscriber circuits 101a to 101n, 102a to 10.
One of LEN0 to LEN1023 is given corresponding to the physical accommodation position number 2n (hereinafter abbreviated as LEN).

The up communication highway 105 and the down communication highway 106 each have a repetition rate of 125 μs.
It is a 1024 multiplexed 8.192Mb/s x 8 parallel highway, and communication information from subscribers LEN0 to LEN1023 (64kb/s voice signal, data signal, etc.) and communication information in the opposite direction are time-divisionally processed. It is multiplexed. Then, according to a connection command from a control device (not shown), the time switch 1 is turned on according to a known procedure.
Lines are concentrated at 09,110.

On the other hand, subscriber circuits 103a to 103n, 104
The control signals from a to 104n are 8.192 Mb/s x 8 in parallel, similar to the communication highways 105 and 106, and are sent to the upstream signal highway 107 (107A to 107) in parallel.
07H (consisting of 8 highways).

FIG. 3a shows the signal allocation.

For analog subscribers, all signals from terminals such as call origination, answering, end of call, dial pulse, etc. are expressed by the presence or absence of a DC loop, so they are called "loop".
Only signals are assigned to signal highway 107A.

For digital subscribers, indicates the status of digital transmission. “Synchronization” is signal highway 107
At B, a digital "subscriber line signal" arriving from a terminal in an out-slot signaling system is assigned to a signal highway 107G.

Further, the signal highway 107H is allocated for a subscriber class identification signal, and the signal contents are the analog subscriber circuits 103a to 103a.
3n is "1", and digital subscriber circuits 104a to 104n are "0".

In this way, since the signal systems for analog subscribers and digital subscribers are completely different, each dedicated signal receiving device 11 is used according to the respective signal system.
There are 2,113. Both signal receiving devices 11
2 and 113 are capable of multiplexing signals for up to 1024 subscribers, respectively, and the received signal distribution circuit 1
11 to an upstream signal highway 117.

The received signal distribution circuit 111 selects the uplink signal highways 107A to 107G according to the subscriber class identification signal on the uplink signal highway 117H.
The corresponding signal receiving device 11 receives the signal in LEH units.
2 or 113.

Further, subscriber circuits 103a to 103n, 104
The signal allocation of control signals for a to 104n is as shown in FIG. 3b.

Control signals corresponding to the analog subscriber class are generated in a signal transmitting device 115, and control signals corresponding to the digital subscriber class are generated in a signal transmitting device 116. Since the subscriber class identification signal described above is also received by the transmission signal selection circuit 114, the corresponding signal transmission device 115 or 116 is selected for each LEN and transmitted to the downstream signal highway 10.
8 (consisting of 8 highways 108A to 108H). In this way, control signals are distributed to each subscriber circuit 103a to 103n, 104a to 104n, so each subscriber circuit receives the control signal of its own LEN from the simultaneous division multiplexed signal highway and transfers it to the subscriber line. control.

Next, FIG. 4 is a block diagram of an embodiment of the received signal distribution circuit/transmission signal selection circuit in FIG. 2, and FIG. 5 is a time chart thereof.

Here, 201A to 201G, 202A to 20
2G is up signal highway 107A-107H
203 is a data selector, 2
04, 205, 206 are flip-flops, 20
7 is a clock. In addition, Figure 4 shows LEN0 to 3.
has been made for the case where analog subscriber classes LEN4, LEN5, 1023 are digital subscriber classes.

Control signals for upstream signal highways 107A to 107G are controlled by gates 201A to 20 in the case of analog subscriber class, depending on the value (“1”, “0”) of the subscriber class identification signal of signal highway 107H.
After 1G is opened and retimed by flip-flop 204, the signal receiver 112 for the analog subscriber class is sent via signal lines 117A to 117G.
For the digital subscriber class, gates 202A-202G open and flip-flop 2
After retiming at 05, the signal line 118A~
118G to the signal receiving device 113 for the digital subscriber class.

On the other hand, subscriber circuits 103a to 104n, 104
Control signals for a to 104n include signals from signal transmitter 115 for the analog subscriber class (via signal paths 119A to 119H) and signals from signal transmitter 116 for the digital subscriber class (via signal paths 120A to 119H). 120H) is selected by the selector 203 according to the value of the subscriber class identification signal (the one on the signal highway 107H), then retimed by the flip-flop 206 and distributed via the signal highway 108.

〔Effect of the invention〕

As described above in detail, according to the present invention, it is possible to accommodate subscriber lines of different subscriber classes such as analog and digital in the same line concentrator, and furthermore, the subscriber classes can be stored in a common memory. Since there is no need to memorize the information, significant effects can be obtained in reducing the hardware cost of the time division switch and simplifying maintenance work associated with changing subscriber classes.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an example of a conventional digital subscriber line exchange, FIG. 2 is a block diagram of an embodiment of a line concentrator using a subscriber class identification control system according to the present invention, and FIG. FIG. 4 is a block diagram of an embodiment of the received signal distribution circuit/transmission signal selection circuit, and FIG. 5 is a time chart thereof. 101a to 101n, 102a to 102n...
Subscriber lines, 103a-103n, 104a-10
4n...Subscriber circuit, 105, 106...Communication highway, 107,108...Signal highway,
109, 110... Time switch, 111... Reception signal distribution circuit, 112, 113... Signal receiving device, 114... Transmission signal selection circuit, 115, 11
6... Transmission signal device, 201A to 201G, 20
2A to 202G...gate, 203...data selector, 204, 205, 206...flip-flop, 207...clock.

Claims (1)

[Claims] 1 Each subscriber circuit where various subscriber lines are terminated, and a signal receiving device and a signal transmitting device corresponding to each subscriber class are provided, and these are connected by up and down signal highways. In the line concentrator of the time-division exchange, the subscriber class identification signal relating to each subscriber circuit can be transmitted from each subscriber circuit through the upstream signal highway, and the corresponding signal receiving device and signal can be transmitted accordingly. A subscriber class identification control system characterized by selecting a device and controlling the device to receive and transmit a control signal related to the subscriber circuit via an upstream/downstream signal highway.