JPH07193627A - Subscriber line allocating device - Google Patents

Abstract

PURPOSE:To attain high speed allocating processing of subscriber lines with one time switch by switching a B channel signal and a D channel collectively whose capacity, that is, whose transmission speed differs each other through same exchange processing. CONSTITUTION:A channel signal demultiplexer circuit 11 receives an incoming multiplex signal via highways 100-107 to demultiplex the signal into a B channel signal and a D channel signal. Then the B channel signal is converted into a parallel signal by an S/P conversion circuit 12, a D-channel signal is multiplexed by a multiplex conversion circuit 13 to be synchronized with a D channel signal corresponding to the B channel signal. Then both the signals are inputted to a time switch 14 and are subjected to parallel exchange processing altogether. Then the B channel signal is converted into a serial signal at a P/S conversion circuit 16 and the D channel signal is demultiplexed by a multiplexer/demultiplexer circuit 17. Then a channel signal overall circuit 18 receives both outputs to re-compose the original subscriber signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subscriber line allocating device, and more particularly to a subscriber line allocating device for individually distributing a subscriber line to a predetermined exchange in an ISDN subscriber system.

[0002]

2. Description of the Related Art Generally, in the ISDN subscriber system,
When accommodating a large number of subscriber lines in a switchboard, a subscriber line multiplex transmission system for multiplexing and transmitting these subscriber lines for every predetermined accommodation unit is adopted from the viewpoint of transmission quality and economy.

FIG. 9 is an explanatory diagram showing a conventional ISDN subscriber system based on the subscriber multiplex transmission system. In the figure, 3 is an ISDN terminal connected to an ISDN line, 4 is an analog telephone connected to an analog line, and 20 to 27 are multiplexers / demultiplexers for multiplexing subscriber lines in predetermined accommodation units. (Subscriber devices), 50-57 are demultiplexing / multiplexing devices (stations) that connect / separately connect the subscriber lines multiplexed by the demultiplexing / demultiplexing devices 20-27 to a predetermined exchange according to the type of each terminal. Device).

Reference numerals 60 to 67 are ISDN exchanges for accommodating the ISDN lines of the subscriber lines and performing a circuit switching process for these ISDN lines, and 70 to 77 are accommodating the analog lines of the subscriber lines and lines for these analog lines. The analog exchanges 180 to 187 that perform exchange processing are composed of optical fiber cables and the like, and are multiplexing and demultiplexing devices 20 to 27.
And a demultiplexing / multiplexing device 50 to 57 are bidirectionally connected.

Now, as a subscriber signal, a digital signal (2B + D) is output from the ISDN terminal 3 and
A digital signal (B) obtained by digitizing the analog signal from the analog telephone 4 is output, and the multiplexer / demultiplexers 20 to 2 are connected to the respective terminals or telephones.
In step 7, the signal is multiplexed, that is, stored in a predetermined time slot, then output as an upstream multiplexed signal and transmitted to the demultiplexing / multiplexing devices 50 to 57 via the highways 180 to 187.

In the demultiplexers / multiplexers 50 to 57, these upstream multiplexed signals are subscriber exchanges which are predetermined according to the type of each subscriber line (ISDN line / analog line), that is, ISDN exchanges 60 to 57. 67 or the analog exchanges 70 to 77 are separately output and accommodated in an exchange suitable for each subscriber line.

On the contrary, the subscriber signals output from the respective exchanges are subjected to a multiplexing process in the demultiplexing / multiplexing devices 50 to 57, that is, stored in a predetermined time slot, and then as a downlink multiplexed signal to the highways 180 to 57. It is transmitted to the multiplexer / demultiplexers 20 to 27 via 187 and separated and output to the respective subscriber lines corresponding thereto, and thus multiple subscriber lines are multiplexed for each predetermined accommodation unit. As a result, transmission quality and economic efficiency in the subscriber system are improved.

[0008]

Therefore, in the subscriber system in such a conventional ISDN, the subscriber line multiplexed in each multiplexer / demultiplexer is accommodated in each exchange in a predetermined accommodation unit. If unused unused lines exist in the subscriber lines connected to the multiplexer / demultiplexer, there will be free space in the time slots of the upstream and downstream multiplexed signals fixedly provided to these subscriber lines. However, there is a problem that the accommodation efficiency of the subscriber line in the subscriber interface circuit provided in each exchange is reduced according to the capacity of this multiplexed signal, which causes extra capital investment. It was

Further, since the multiplexing / demultiplexing device and the demultiplexing / multiplexing device correspond to each other 1: 1, the accommodation destination exchange is fixedly determined for the subscriber line of the predetermined accommodation unit.
When a subscriber moves to a different jurisdiction of a multiplex device due to a move, etc., even if the destination is a neighborhood that can be accommodated by the previous switch, the switch corresponding to that multiplexer / demultiplexer is different from the previous switch. In this case, since the subscriber's telephone number is forcibly changed, there is a problem that a burden is imposed on the subscriber.

The present invention is intended to solve such a problem, and provides a subscriber line allocating device which allows individual subscriber lines to be accommodated in an arbitrary exchange and improves the efficiency of accommodating the subscriber lines in the exchange. It is intended to be provided.

[0011]

In order to achieve such an object, the subscriber line distribution apparatus according to the present invention is a
By installing the subscriber signal stored in each time slot in each multiplexed signal transmitted between each device and installed between the demultiplexing device and the demultiplexing / multiplexing device in a predetermined time slot, A subscriber line allocating device for accommodating a subscriber line in an arbitrary exchange, wherein the subscriber line allocating device converts a subscriber signal in each multiplexed signal into a B channel signal and a D channel signal.
Channel signal separation means for separating the channel signals and outputting them in synchronization, serial / parallel conversion means for converting the B channel signals separated and output by the channel signal separation means into B channel parallel signals, and channel signal separation A multiplex converting means for multiplexing and outputting the D channel signal separated and output by the means as a D channel multiplexed signal; a B channel parallel signal from the serial / parallel converting means and a D channel multiplexed signal from the multiplex converting means. A time switch for collectively exchanging parallel signals as a parallel signal based on preset connection information, a parallel / serial conversion means for converting the B channel parallel signal exchange-processed by the time switch into a serial signal, and a time switch. Separates and outputs the exchange-processed D channel multiplexed signal The demultiplexing means, the B channel signal from the parallel / serial converting means, and the D channel signal from the demultiplexing means are integrated to generate an original subscriber signal, which is stored in a predetermined time slot. And channel signal integration means for outputting signals.

[0012]

Therefore, the subscriber signal stored in the multiplexer / demultiplexer or the uplink multiplexed signal or the downlink multiplexed signal from the multiplexer / demultiplexer is separated into the B channel signal and the D channel signal by the channel signal separating means. Then, the B channel signals are converted into parallel signals by the serial / parallel conversion means, and the D channel signals are multiplexed by the multiple conversion means, and the B channel parallel signals from these serial / parallel conversion means are output. The signal and the D-channel multiplexed signal from the multiplex conversion means are collectively processed as a parallel signal by the time switch based on the preset connection information.

Subsequently, the B-channel parallel signal exchange-processed by the time switch is converted into a serial signal by the parallel / serial conversion means, and the D-channel multiplexed signal exchange-processed by the time switch is separated by the demultiplexing means. The B channel signal output from the parallel / serial conversion means and the D channel output from the demultiplexing means.
The channel signal is integrated by the channel signal integrating means to generate the original subscriber signal, then stored in a predetermined time slot, and output as a new uplink multiplexed signal or downlink multiplexed signal.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an ISDN subscriber system according to an embodiment of the present invention. In the figure, the same or equivalent parts as those described above are designated by the same reference numerals.

In FIG. 1, 3 and 3x are ISDN terminals connected to the ISDN line, 4 and 4y are analog telephones connected to the analog line, and 1 is each multiplexing and
Upstream multiplexed signals from the demultiplexers 20 to 27 and demultiplexing
Subscriber line distribution device 100-1 for exchanging individual subscriber signals respectively multiplexed with downlink multiplexed signals from the multiplexers 50-57 and outputting new multiplexed signals.
07 is composed of optical fiber cables, etc.
A highway connecting the demultiplexing devices 20 to 27 and the subscriber line distribution device 1 and 170 to 177 formed of optical fiber cables and the like, a highway connecting the subscriber line distribution device 1 and each demultiplexing / multiplexing device 50 to 57. Is.

FIG. 2 is a block diagram of the subscriber line allocating device 1, and particularly shows a portion relating to an upstream multiplexed signal transmitted from the subscriber terminal to the exchange. In the figure, reference numeral 11 separates the subscriber lines multiplexed by the multiplexers / demultiplexers 20 to 27 into a B channel (voice channel signal) and a D channel signal (control channel signal), and the highways 110 to 10 respectively. 117 and highways 120-1
27 is a channel signal separation circuit for synchronously outputting to 27.

Reference numeral 12 denotes a serial / parallel conversion circuit (hereinafter referred to as an S / P conversion circuit) which converts the B channel serial multiplexed signal from each highway 110 to 117 into a parallel multiplexed signal and outputs it to the highways 130 to 137. , 13 further multiplex the D-channel multiplexed signals from the respective highways 120-127 to the highway 13
8 is a multiplex conversion circuit for outputting to 8.

Reference numeral 14 performs a switching process on the parallel multiplexed signals from the respective highways 130 to 138 based on an instruction from the management control unit 15, and the respective highways 1
It is a time switch for outputting to 40 to 148.

Reference numeral 16 denotes a parallel / serial conversion circuit (hereinafter referred to as a P / S conversion circuit) which converts the B-channel parallel multiplexed signal from each highway 140 to 147 into a serial multiplexed signal and outputs it to the highways 150 to 157. , 17 are demultiplexing circuits for demultiplexing the D channel multiplexed signal from the highway 148 and outputting to the highways 160 to 167.

Reference numeral 18 is a channel signal integration circuit for integrating the subscriber signal relating to the original ISDN line based on the B channel signal from the highways 150 to 157 and the D channel signal from the highways 160 to 167 and outputting to the highways 170 to 177. Is.

Next, referring to FIGS. 1 and 2, as the operation of the present invention, the ISDN terminal 3x connected to the multiplexer / demultiplexer 20 is connected to the ISDN exchange 67 and connected to the multiplexer / demultiplexer 27. A case where the analog telephone 4y is connected to the analog exchange 70 will be described with an example of an upstream multiplexed signal transmitted from each terminal to the exchange.

Now, the ISDN terminals 3 and 3x connected to the multiplexer / demultiplexer 20 output a subscriber signal 2B + D based on the ISDN basic interface, and the analog telephone 4 connected to the multiplexer / demultiplexer 20 outputs the subscriber signal 2B + D. The analog signal is converted into a digital signal by a predetermined device (not shown), and a subscriber signal B similar to that of the ISDN basic interface is output.

Note that B and D indicate an 8-bit speech channel and a 2-bit control channel based on the ISDN basic interface, and 2B + D is a subscriber consisting of two speech channels and one control channel. Shows the signal.

Further, similarly to this, the multiplexer / demultiplexer 27
Subscriber signals 2B + D and B based on or similar to the ISDN basic interface are output from the ISDN terminal 3 and the analog telephones 4 and 4y, respectively.

The multiplexer / demultiplexers 20 to 27 receive subscriber signals from the terminals and telephones connected to the multiplexers / demultiplexers,
It is multiplexed by storing it in a time slot based on a fixed order that is fixed in advance, and outputs it as an upstream multiplexed signal to the subscriber line distribution device 1 via the highways 100 to 107.

The channel signal demultiplexing circuit 11 of the subscriber line distribution device 1 receives the upstream multiplexed signals from the demultiplexing / demultiplexing devices 20 to 27 via the highways 100 to 107,
The subscriber signal stored in each time slot in the upstream multiplexed signal is separated into a B channel signal and a D channel signal.

Therefore, in this case, the ISDN terminal 3,
For the subscriber signal 2B + D from 3x, the B channel signal and the D channel signal are separated, and the separated B channel signal and the D channel signal are synchronized with each other to the highways corresponding to the input highways 100 to 107, respectively. 110-117 and highways 120-1
It is output to 27.

FIG. 3 shows input highways 100-107.
It is an explanatory view showing a subscriber signal from
Bx1, Bx2, Dx are subscriber signals on the highway 100 from the ISDN terminal 3x connected to the multiplexer / demultiplexer 20, and By is connected to the multiplexer / demultiplexer 27 almost in synchronization with Bx2 on the highway 100. Analog telephone 4
The subscriber signal on the highway 107 output from y is shown.

FIG. 4 is a timing chart showing the output signals of the highways 110, 117 and 120 when the subscriber signals shown in FIG. 3 are input to the channel signal separation circuit 11, and in FIG. , T
S1 has 8 data bits, "bit 0" to "bit 7"
Time slot consisting of bits, bx10 to bx1
7, bx20 to bx27, dx0, dx1, and by0 to by7 respectively indicate the bits constituting the channel signals Bx1, Bx2, Dx and By of FIG.

Now, when a subscriber signal as shown in FIG. 3 is input to the channel signal separation circuit 11, the highway 10
Of the subscriber signals from the ISDN terminal 3x on 0, the channel signal Bx2 is output to the highway 110 in the time slot TS0, and in synchronization with this, in this case, in the "bit 7" of the same time slot, The bit dx1 of the separated channel signal Dx is output to the highway 120.

Further, the channel signal By from the analog telephone 4y, which is input almost in synchronization with the channel signal Bx2 on the highway 100, is output to the highway 117 at the same time slot TS0 as the channel signal Bx2. Since the subscriber signal from the analog telephone 4y does not include the D channel signal, the D channel signal corresponding to this B channel signal is not output, and the D channel signal highway 1 corresponding to the B channel signal highway 117 is not output.
The 27 time slots TS0 become empty.

Similarly, in the time slot TS1,
The channel signal Bx1 of the highway 100 is the highway 11
In addition to being output to 0, the highway 120 outputs the bit dx0 of the separated channel signal Dx in synchronization with this, that is, in "bit 7" of the same time slot.

Next, the channel signals Bx1, Bx2, By separated by the channel signal separation circuit 11 are sent to the highway 11
It is input to the S / P conversion circuit 12 via 0 to 117, and the conversion from the serial signal to the parallel signal is performed here.

FIG. 5 shows the B channel signal S / P conversion circuit 12 when each D channel signal shown in FIG. 4 is input.
FIG. 6 is a timing chart showing an output signal from the device.

In the time slot TS0, each bit bx20 to bx27 of Bx2 input from the highway 110.
Is converted into a parallel signal in the S / P conversion circuit 12, and the time slot T on each of the highways 130 to 137.
It is output in parallel to "bit 7" of S0.

Similarly, in the time slot TS0, the bit dx1 of the channel signal Dx input from the highway 120 is multiplexed in the multiplex conversion circuit 13 and synchronized with the above-mentioned Bx2, the "bit 7" of the time slot TS0 on the highway 138. Is output to.

B input from the highway 117
Each bit by0 to by7 of y is converted into a parallel signal in the S / P conversion circuit 12, and each highway 130 to 13 is converted.
7 are output in parallel to the "bit 0" of the time slot TS0 on the top. In this case, since the D channel signal on the highway 127 in the time slot TS0 is empty, "bit 0" on the highway 138 output from the multiplex conversion circuit 13 in synchronization with By becomes empty.

Further, also in the time slot TS1, Bx1 input from the highway 110 as described above.
Bx10 to bx17 are converted into parallel signals in the S / P conversion circuit 12, and the highways 130 to 1 are converted into parallel signals.
37 is output in parallel to the "bit 7" of the time slot TS1 on 37, and the time slot TS is also output.
1, the bit dx0 of Dx input from the highway 120 is multiplexed in the multiplex conversion circuit 13 and output to the "bit 7" of the time slot TS1 on the highway 138 in synchronization with the above-mentioned Bx1.

Next, the B-channel signal output in parallel to the highways 130 to 137 and the D-channel signal output to the highway 138 are input to the time switch 14, where the management controller 15 issues a connection instruction. B
The channel signal and the D channel signal synchronized with the B channel signal are simultaneously exchanged, and the highway 14
It is output in parallel to a predetermined bit of a predetermined time slot of 0 to 148.

In the management control unit 15, connection instruction information is set in advance by the management operator on the basis of information such as the exchanges in which each subscriber line is to be accommodated and the accommodation position thereof. And the connection instruction information is maintained according to the change of subscription.

FIG. 6 is a timing chart showing subscriber signals that are exchange-processed by the time switch 14 and are output in parallel to the highways 140 to 148.

ISDN terminal 3x stored in "bit 7" of time slot TS0 of highways 130-138
The channel signal Bx2 and the bit bx1 of the channel signal Dx are subjected to exchange processing by the time switch 14 and output to the "bit 0" of the time slot TS0 of the highways 140 to 148, and also the highways 130 to 1
The channel signal By from the analog telephone 4y stored in "bit 0" of the 38 time slot TS0 is output to "bit 7" of the time slot TS0 of the highways 140 to 148.

Further, the ISDN stored in "bit 7" of the time slot TS1 of the highways 130 to 138.
Channel signal Bx1 and channel signal D from terminal 3x
The bit bx0 of x is exchanged by the time switch 14, and the time slot TS of the highways 140 to 148 is changed.
It is output to "bit 0" of 1.

Therefore, in the subscriber line distribution device 1,
The input subscriber signal is separated into a B-channel signal and a D-channel signal, and a parallel signal is generated by synchronizing these signals, so that the B-channel signal and the D-channel signal having different capacities, that is, different transmission rates are It is possible to perform high-speed switching collectively by the same exchange processing by one time switch 14.

Next, of the subscriber signals output from the time switch 14 to the highways 140 to 148, the B channel signal is input to the P / S conversion circuit 16 via the highways 140 to 147, where The parallel signal is converted into a serial signal, and the predetermined highway 150
˜157, and the D channel signal is input to the demultiplexing circuit 17 via the highway 148,
It is separated here and separated and output to predetermined highways 160 to 167.

FIG. 7 is a timing chart showing subscriber signals output from P / S conversion circuit 16 to highways 150, 157 and 160.

The channel signal By of the analog telephone 4y stored in parallel in "bit 7" of the time slot TS0 of the highways 140 to 147 is serially converted by the P / S conversion circuit 16 and fixedly determined in advance. ISD that is serially output to the time slot of the highway, that is, the time slot TS0 of the highway 150 in this case, and that is also stored in parallel at "bit 0" of the time slot TS0.
The channel signal Bx2 of the N terminal 3x is serially output to the time slot TS0 of the highway 157.

The channel signal Dx of the ISDN terminal 3x stored in "bit 0" of the time slot TS0 of the highway 148 is separated by the demultiplexing circuit 17,
A highway time slot fixedly fixed in advance, here, a highway 167 time slot TS0
The bit dx1 is output to the "bit 7" of the.

Subsequently, similarly, highways 140 to 147
Channel signal Bx2 of the ISDN terminal 3x, which is stored in parallel in the “bit 0” of the time slot TS1 of, is serially output to the time slot TS1 of the highway 157 and is also stored in the “bit 0” of the time slot TS1 of the highway 148. ISDN terminal 3x channel signal D
x is separated and highway 167 timeslot TS
1 The bit dx0 is output as the first bit.

Next, in the channel signal integration circuit 18, highways 150 to 157 and highways 160.
Of each subscriber signal input via
Those from the DN terminals 3 and 3x are integrated with the original subscriber signal 2B + D and output.

FIG. 8 is an explanatory diagram showing subscriber signals output from the channel signal integration circuit 18 to the highways 170 and 177.

Time slot TS0 of highway 150
The respective bits of the channel signal By of the analog telephone 4y input by the are output to the highway 170 as they are, and the channel signals B2x and B1x of the ISDN terminal 3x input in the time slots TS0 and TS1 of the highway 157 are synchronized with them. Channel signal D input in the time slots TS0 and TS1 of the highway 160
It is integrated with x, reconstructed into the original subscriber signal 2B + D and output to the highway 177.

In this way, the subscriber signal from the ISDN terminal 3x multiplexed and output in the predetermined time slot of the highway 100 in the multiplexer / demultiplexer 20 is switched to the highway 17 by the exchange processing in the subscriber line distribution device 1.
It is stored in a predetermined time slot of 7 and is output as a new uplink multiplexed signal.
Separately output to the DN exchange 67.

The subscriber signal from the analog telephone 4y, which is multiplexed by the multiplexer / demultiplexer 27 and is multiplexed and output in a predetermined time slot of the highway 107, is switched to the highway 170 by the exchange processing in the subscriber line distribution device 1.
In a predetermined time slot, is output as a new upstream multiplexed signal, and is separated and output to the analog exchange 70 in the demultiplexing / multiplexing device 50.

Therefore, in the subscriber line distribution device 1,
Input side highways 130-1 based on predetermined connection information
Subscriber signal from the output side highway 140-1
It is possible to accommodate each subscriber line individually in any exchange by connecting it to any of the 48 arbitrary time slots, and by setting the exchange connection destination so that no vacant space is created, so that it can be accommodated in the exchange. It is possible to improve efficiency.

In the above description, the upstream subscriber signal from the subscriber terminal side to the exchange has been described. However, the downlink subscriber signal from the exchange terminal to the subscriber terminal has a completely opposite signal transmission direction. , Similar signal processing is performed.

In the above description, the case where eight multiplexers / demultiplexers 20 to 27 and eight multiplexers / demultiplexers 50 to 57 are connected to the subscriber line distribution device 1 has been described. The number of is not limited. In general, since the terminal accommodation efficiency in the multiplexer / demultiplexer is relatively small, the number of multiplexers / demultiplexers is larger than that in the multiplexer / demultiplexer.

In addition, the ISDs are added to the multiplexer / demultiplexers 20 to 27.
Although the case where the N terminals 3 and 3x and the analog telephone terminals 4 and 4y are accommodated in a mixed manner has been described, the present invention is similarly implemented when only one of them is accommodated without being mixed. Is possible, and the same effect can be obtained.

[0059]

As described above, according to the present invention, a channel signal separation circuit for separating a multiplexed subscriber signal into a B channel signal and a D channel signal and a parallel signal are generated by synchronizing them. Since the S / P conversion circuit and the multiple conversion circuit are provided so that the B channel signal and the D channel signal having different capacities, that is, different transmission speeds are collectively switched by the same exchange processing, one time switch is used for joining. High-speed distribution processing of private lines becomes possible.

Further, each subscriber line can be accommodated in an arbitrary exchange, and by changing the connection information in the subscriber line distribution device, the distribution destination of the subscriber line can be changed. , Maintenance work is saved. Also, when the subscriber moves to the jurisdiction of a different multiplex device due to a move, etc., if the destination multiplex device is connected to the same subscriber line distribution device, change the above connection information. As a result, it is possible to accommodate in the exchange that was accommodated before the move, and it is possible to use it without changing the original telephone number, and it is possible to eliminate the burden on the subscriber due to the move.

Further, it becomes possible to adjust the connection information in the subscriber line allocating device, reduce the vacancy of the subscriber line interface circuit in the exchange, and improve the subscriber line accommodation efficiency. It becomes possible to raise.

[Brief description of drawings]

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

FIG. 2 is a block diagram of a subscriber line distribution device according to an embodiment of the present invention.

3 is an explanatory diagram showing subscriber signals in the highways 100 and 107 of FIG. 2. FIG.

4 is the highway 110, 117 and 120 of FIG.
3 is a timing chart of a subscriber signal in FIG.

5 is a timing chart of subscriber signals on the highways 130 to 138 of FIG.

FIG. 6 is a timing chart of subscriber signals in highways 140 to 148 of FIG.

FIG. 7 is the highways 150, 157 and 167 of FIG.
3 is a timing chart of a subscriber signal in FIG.

8 is an explanatory diagram showing subscriber signals in the highways 170 and 177 of FIG.

FIG. 9 is a block diagram showing an ISDN subscriber system according to an embodiment of the present invention.

[Explanation of symbols]

 1 subscriber line distribution device 11 channel signal separation circuit 12 serial / parallel conversion circuit 13 multiplex conversion circuit 14 time switch 15 management control unit 16 parallel / serial conversion circuit 17 multiplex / separation circuit 18 channel signal integration circuit 20-27 multiplex / separation device 3,3x ISDN terminal 4,4y Analog telephone 50-57 Separation / multiplexer 60-67 ISDN exchange 70-77 Analog exchange

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication location H04Q 11/04 303 B 9076-5K (71) Applicant 000005223 Fujitsu Limited Nakahara-ku, Kawasaki-shi, Kanagawa Prefecture 1015 Odanaka (72) Inventor Kazuhiro Okashita 5-7 Shiba 5-chome, Minato-ku, Tokyo NEC Electric Co., Ltd. (72) Inventor Nobuhiko Uema 5-7 Shiba 5-chome, Minato-ku, Tokyo NEC Corporation Inside the company (72) Inventor Tetsuya Funabashi 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph Telephone Co., Ltd. (72) Hirofumi Horikoshi 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph Telephone Co., Ltd. (72) Inventor Koichi Shimizu 216 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa, Ltd. Information & Communication Division, Hitachi, Ltd. (72) Inventor Takuya Tsuruoka Port of Tokyo 1-7-12 Toranomon-ku, Oki Electric Industry Co., Ltd. (72) Inventor Junichi Fujii 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Within Fujitsu Limited

Claims (1)

[Claims] 1. A subscriber which outputs an uplink multiplexed signal in which subscriber signals from a plurality of subscriber lines are stored in a predetermined time slot and which is stored in each time slot in the input downlink multiplexed signal. A multiplexer / demultiplexer that separates and outputs signals to predetermined subscriber lines, and a subscriber signal that is stored in each time slot of the upstream multiplex signal from this multiplexer / demultiplexer is separated and output to predetermined switches. Also, in the ISDN subscriber system comprising a demultiplexing / multiplexing device for outputting to the demultiplexing device a downlink multiplexed signal in which a subscriber signal from each exchange is stored in a predetermined time slot, the multiplexing / demultiplexing device and the demultiplexing device are provided. The subscriber signal stored in each time slot in each of the multiplexed signals transmitted between each of the devices, which is installed between the demultiplexing / multiplexing device, is transmitted to a predetermined time. A subscriber line allocating device for accommodating a subscriber line in an arbitrary exchange by reversibly connecting to a slot, wherein the subscriber line allocating device converts the subscriber signal in each of the multiplexed signals into a B channel signal. D
A channel signal separating means for separating the channel signal and outputting them in synchronization; a serial / parallel converting means for converting the B channel signal separated and output by the channel signal separating means into a B channel parallel signal; Multiplexing and converting means for multiplexing and outputting the D channel signal separated and output by the separating means as a D channel multiplexed signal, the B channel parallel signal from the serial / parallel converting means, and the D channel multiplexing from the multiplex converting means. Time switch for collectively exchanging the converted signal as a parallel signal based on preset connection information, and parallel / serial conversion for converting the B channel parallel signal exchange-processed by the time switch into a serial signal. Means and the time switch was exchanged The demultiplexing means for demultiplexing and outputting the D channel multiplexed signal, the B channel signal from the parallel / serial converting means and the D channel signal from the demultiplexing means are integrated to generate the original subscriber signal. And a channel signal integrating means for outputting a new multiplexed signal in which is stored in a predetermined time slot.