JP3349811B2 - Subscriber line sorting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Generally, in an ISDN subscriber system,
When a large number of subscriber lines are accommodated in an exchange, a subscriber line multiplexing transmission system is adopted in which these subscriber lines are multiplexed and transmitted for each predetermined accommodation unit from the viewpoint of transmission quality and economy.

FIG. 9 is an explanatory diagram showing a conventional ISDN subscriber system based on a 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 multiplexing / demultiplexing devices for multiplexing subscriber lines in predetermined accommodation units. (Subscriber devices), 50 to 57 are demultiplexer / multiplexers (stations) for separating and connecting the subscriber lines multiplexed by the respective multiplexers / demultiplexers 20 to 27 to a predetermined exchange according to the type of each terminal. Device).

[0004] Reference numerals 60 to 67 denote ISDN exchanges which accommodate ISDN lines among subscriber lines and perform line switching processing for these ISDN lines, and numerals 70 to 77 accommodate analog lines among subscriber lines and lines for these analog lines. The analog exchanges 180 to 187 for performing the switching process are constituted by optical fiber cables and the like, and are configured by multiplexing / demultiplexing devices 20 to 27.
And a demultiplexer / multiplexer 50-57.

Now, a digital signal (2B + D) is output from the ISDN terminal 3 as a subscriber signal,
A digital signal (B) obtained by digitizing an analog signal from the analog telephone 4 is output, and the multiplexing / demultiplexing devices 20 to 2 to which each terminal or telephone is connected.
At 7, a multiplexing process, that is, after being stored in a predetermined time slot, is output as an uplink multiplexed signal and transmitted to demultiplexing / multiplexing devices 50 to 57 via highways 180 to 187.

[0006] These uplink multiplexed signals are demultiplexed / multiplexed by the demultiplexers 50 to 57 in accordance with the type of each subscriber line (ISDN line / analog line) or the like, ie, the ISDN exchanges 60 to 60. The data is separated and output to 67 or analog exchanges 70 to 77 and accommodated in an exchange suitable for each subscriber line.

Conversely, the subscriber signals output from the respective exchanges are multiplexed in the demultiplexing / multiplexing devices 50 to 57, that is, stored in predetermined time slots, and then converted to the highway 180 to the downstream multiplexed signals. The signal is transmitted to the multiplexing / demultiplexing devices 20 to 27 via 187, and is separated and output to the corresponding subscriber lines. Thus, a large number of subscriber lines are multiplexed for each predetermined accommodation unit. As a result, transmission quality and economy of the subscriber system are improved.

[0008]

Therefore, in such a subscriber system in the conventional ISDN, a subscriber line multiplexed in each multiplexer / demultiplexer is accommodated in each exchange in a predetermined accommodation unit. If there are unused vacant lines in the subscriber lines connected to the multiplexing / demultiplexing device, vacancies are provided in the time slots of the uplink multiplexed signal and the downlink multiplexed signal fixedly provided in these subscriber lines. There is a problem that the subscriber line accommodating efficiency in the subscriber interface circuit provided in each exchange is reduced in accordance with the capacity of the multiplexed signal, which causes extra capital investment. Was.

In addition, since the multiplexing / demultiplexing device and the demultiplexing / multiplexing device correspond to each other on a one-to-one basis, an accommodation exchange is fixedly determined for a subscriber line of a predetermined accommodation unit.
When a subscriber moves to a different multiplexing device jurisdiction due to moving or the like, the switching device corresponding to the multiplexing / demultiplexing device is different from the previous switching device even if the destination is a neighborhood that can be accommodated in the previous switching device. In such a case, since the subscriber telephone number is forcibly changed, there is a problem in that a burden is imposed on the subscriber.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and a subscriber line distributing apparatus which can accommodate individual subscriber lines in an arbitrary exchange and improves the accommodation efficiency of the subscriber lines in the exchanges. It is intended to provide.

[0011]

In order to achieve the above object, a subscriber line sorting apparatus according to the present invention comprises a
It is installed between the demultiplexing device and the demultiplexing / multiplexing device, and by switching and connecting the subscriber signal stored in each time slot in each multiplexed signal transmitted between each device to a predetermined time slot, A subscriber line distributing apparatus for accommodating a subscriber line in an arbitrary exchange. This subscriber line distributing apparatus converts a subscriber signal in each multiplexed signal into two 8-bit wide B-channel signals and a 2-bit wide signal. of separated into a D channel signal, a channel signal separating means for outputting one bit of the D channel signal <br/> synchronized to each B-channel signal, a B-channel signal separated output by the channel signal separating means Placed at the same bit position in the same time slot
Serial / parallel conversion means for converting into an 8-bit B-channel parallel signal; and a D-channel signal separated and output by the channel signal separation means as the D-channel signal.
Same time slot as corresponding B channel parallel signal
Multiplexing means for multiplexing and outputting as a 1-bit D-channel multiplexed signal arranged at the same bit position, a B-channel parallel signal from the serial / parallel converting means and a D-channel multiplexed signal from the multiplexing converting means A time switch for performing batch processing as a parallel signal based on connection information set in advance, and the same bit position of the same time slot exchanged by the time switch.
And a parallel / serial converting means for converting arranged 8-bit B channel parallel signals to serial signals, exchanged processed by the time switch, the B-channel parallel signals
Placed at the same bit position in the same time slot as the signal
Demultiplexing means for separating output 1-bit D-channel multiplexed signal, output from the parallel / serial converting means
Two 8- channel wide B-channel signals and two 1-bit 2 bits output from the demultiplexer in synchronization with each B-channel signal.
One of generating an original subscriber signal by integrating the D-channel signal, which is intended and a channel signal integration means for outputting a new multiplexed signal stored in the predetermined time slot.

[0012]

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

Subsequently, the B-channel parallel signal exchanged by the time switch is converted into a serial signal by a parallel / serial converter, and the D-channel multiplexed signal exchanged by the time switch is separated by a demultiplexer. Output from the parallel / serial converter and the D-channel signal from the demultiplexer.
The channel signal is integrated with the channel signal by the channel signal integration means, generated as an original subscriber signal, stored in a predetermined time slot, and output as a new uplink multiplexed signal or downlink multiplexed signal.

[0014]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a subscriber system of an ISDN according to one embodiment of the present invention, in which the same reference numerals are given to the same or equivalent parts as described above.

In FIG. 1, 3, 3x are ISDN terminals connected to an ISDN line, 4, 4y are analog telephones connected to an analog line, and 1 is each
Uplink multiplexed signals from the separation devices 20 to 27 and separation
A subscriber line sorting device for exchanging individual subscriber signals respectively multiplexed with the downlink multiplexed signals from the multiplexing devices 50 to 57 and outputting a new multiplexed signal;
07 is composed of an optical fiber cable, etc.
Highways 170 to 177 for connecting the demultiplexing devices 20 to 27 and the subscriber line sorting device 1 are composed of optical fiber cables and the like, and connecting the subscriber line distributing device 1 to the respective demultiplexing / multiplexing devices 50 to 57. It is.

FIG. 2 is a block diagram of the subscriber line sorting apparatus 1, particularly showing a portion related to an uplink multiplexed signal transmitted from the subscriber terminal to the exchange. In FIG. 1, reference numeral 11 demultiplexes a subscriber line multiplexed by each of the multiplexing / demultiplexing devices 20 to 27 into a B channel (voice channel signal) and a D channel signal (control channel signal). 117 and Highway 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 signals from the highways 110 to 117 into parallel multiplexed signals and outputs the signals to the highways 130 to 137. , 13 further multiplex the D-channel multiplexed signals from each of the highways 120 to 127 and
8 is a multiplex conversion circuit for outputting to the multiplex conversion circuit 8.

The switching unit 14 performs a switching process on the parallel multiplexed signal from each of the highways 130 to 138 based on an instruction from the management control unit 15, and
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 signals from the highways 140 to 147 into serial multiplexed signals and outputs the signals to the highways 150 to 157. , 17 are demultiplexing circuits for demultiplexing the D-channel multiplexed signal from the highway 148 and outputting the demultiplexed signals to the highways 160 to 167.

Reference numeral 18 denotes a channel signal integration circuit that integrates a subscriber signal relating to the original ISDN line based on the B channel signals from the highways 150 to 157 and the D channel signals from the highways 160 to 167 and outputs the signal to the highways 170 to 177. It is.

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

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

B and D indicate an 8-bit communication channel and a 2-bit control channel based on the ISDN basic interface, and 2B + D indicates a subscriber including two communication channels and one control channel. The signal is shown.

Similarly, the multiplexing / demultiplexing device 27
The subscriber signals 2B + D and B based on the ISDN basic interface or similar are output from the ISDN terminal 3 and the analog telephones 4 and 4y, respectively.

Each of the multiplexing / demultiplexing devices 20 to 27 converts a subscriber signal from each terminal and telephone connected to its own device,
It is multiplexed by storing it in a time slot based on a fixed order determined in advance, and is output to the subscriber line distribution device 1 via the highways 100 to 107 as an uplink multiplexed signal.

The channel signal separating circuit 11 of the subscriber line sorting device 1 receives the uplink multiplexed signals from the multiplexing / demultiplexing devices 20 to 27 via the highways 100 to 107,
The subscriber signal stored in each time slot in the uplink 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 and correspond to the highways respectively corresponding to the input highways 100 to 107. 110-117 and Highway 120-1
27.

FIG. 3 shows the input highways 100 to 107.
It is an explanatory view showing a subscriber signal from
Bx1, Bx2 and 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
7 shows a subscriber signal on the highway 107 output from y.

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

Now, when a subscriber signal as shown in FIG.
Among 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, to "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 in the same time slot TS0 as the channel signal Bx2. Since the subscriber signal from analog telephone 4y does not include a D-channel signal, a D-channel signal corresponding to the B-channel signal is not output, and a D-channel signal highway 1 corresponding to the B-channel signal highway 117 is not output.
The 27 time slots TS0 are empty.

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

Next, the channel signals Bx1, Bx2 and By separated by the channel signal separation circuit 11 are
The signal is input to the S / P conversion circuit 12 via 0 to 117, where the serial signal is converted into a parallel signal.

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

In time slot TS0, each bit bx20 to bx27 of Bx2 input from 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
The data 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 is synchronized with the above-mentioned Bx2 in the "bit 7" of the time slot TS0 on the highway 138. Is output.

B input from highway 117
Each bit by0 to by7 of y is converted into a parallel signal by the S / P conversion circuit 12, and each of the highways 130 to 13
7 are output in parallel to “bit 0” of the time slot TS0. 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.
Are converted into parallel signals in the S / P conversion circuit 12, and the highways 130-1
37, are output in parallel to the "bit 7" of the time slot TS1.
At 1, the bit dx0 of Dx input from the highway 120 is multiplexed in the multiplex conversion circuit 13, and is output to the "bit 7" of the time slot TS1 on the highway 138 in synchronization with the aforementioned 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 they are sent in response to a connection instruction from the management control unit 15. And 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 predetermined bits of predetermined time slots 0 to 148.

In the management control unit 15, connection instruction information is set in advance by a management worker based on information such as the exchanges in which each subscriber line is to be accommodated and the accommodation location thereof. The connection instruction information is maintained according to the change of the subscription and the subscription.

FIG. 6 is a timing chart showing subscriber signals exchanged by the time switch 14 and output in parallel to the highways 140 to 148.

The ISDN terminal 3x stored in "bit 7" of the time slot TS0 of the highways 130 to 138
The channel signal Bx2 and the bit bx1 of the channel signal Dx are exchanged by the time switch 14 and output to the "bit 0" of the time slot TS0 of the highways 140 to 148.
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
Output to "bit 0" of 1.

Therefore, in the subscriber line sorting device 1,
By separating the input subscriber signal into a B-channel signal and a D-channel signal and synchronizing them to generate a parallel signal, the B-channel signal and the D-channel signal having different capacities, that is, different transmission speeds, are separated by one. High-speed switching can be performed collectively by the same exchange processing by the two time switches 14.

Next, of the subscriber signals output from the time switch 14 to each of the highways 140 to 148, the B channel signal is input to the P / S conversion circuit 16 via the highways 140 to 147. The parallel signal is converted to a serial signal, and is converted to a predetermined highway 150.
157, and the D channel signal is input to the demultiplexing circuit 17 via the highway 148,
Here, they are separated and output separately 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.

Channel signal By of analog telephone 4y stored in parallel in "bit 7" of time slot TS0 of highways 140 to 147 is serially converted by P / S conversion circuit 16 and fixedly determined in advance. ISD which is serially output to the time slot of the highway, here the time slot TS0 of the highway 150, and also stored in parallel in the “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 determined in advance, here, a highway 167 time slot TS0
The bit dx1 is output to the "bit 7" of.

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

Next, in the channel signal integration circuit 18, the highways 150 to 157 and the highways 160
Out of the subscriber signals input through
The signals from the DN terminals 3 and 3x are integrated into the original subscriber signal 2B + D and output.

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

Time slot TS0 of highway 150
, The bits of the channel signal By of the analog telephone 4y input to the analog telephone 4y 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 therewith. Channel signal D input in time slots TS0 and TS1 of highway 160
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 by the subscriber line distribution device 1 to the highway 17
7 and is output as a new uplink multiplexed signal.
It is separated and output to the DN switch 67.

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

Therefore, in the subscriber line sorting device 1,
Based on predetermined connection information, the input highways 130-1
38 is output to the output side highways 140-1.
By switching and connecting to any 48 time slots, each subscriber line can be individually accommodated in an arbitrary exchange. Further, by setting so that no vacancy is generated as an exchange connection destination, accommodation in the exchange can be achieved. Efficiency can be improved.

In the above description, the upstream subscriber signal from the subscriber terminal to the exchange has been described, but the downstream subscriber signal from the exchange to the subscriber terminal has a completely reverse signal transmission direction. , And the same signal processing is performed.

In the above description, the case where eight multiplexing / demultiplexing devices 20 to 27 and eight multiplexing / demultiplexing devices 50 to 57 are connected to the subscriber line sorting device 1 has been described. Is not limited. Generally, since the terminal accommodation efficiency of the multiplexing / demultiplexing device is relatively small, the number of multiplexing / demultiplexing devices is larger than that of the demultiplexing / multiplexing device.

The multiplexing / demultiplexing devices 20 to 27 have ISD
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 in a case where only one of the N terminals 3 and 3x is accommodated without being mixed. It is possible to achieve the same effect.

[0059]

As described above, according to the present invention, a channel signal separating circuit for separating a multiplexed subscriber signal into a B channel signal and a D channel signal, and synchronizing the channel signal separating circuit to generate a parallel signal. An S / P conversion circuit and a multiplex conversion circuit are provided so that B-channel signals and D-channel signals having different capacities, that is, different transmission speeds, are collectively switched by the same exchange processing. High-speed distribution processing of the service line.

Further, individual subscriber lines can be accommodated in an arbitrary exchange, and the subscriber line distribution destination can be changed by changing the connection information in the subscriber line distribution device. In addition, labor for maintenance work is reduced. Also, when a subscriber moves to a jurisdiction of a different multiplexing device due to moving or the like, and the multiplexing device at the destination is connected to the same subscriber line sorting device, the connection information described above must be changed. Thus, the telephone can be accommodated in the exchange housed before the move and can be used as it is without changing the original telephone number, and the burden on the subscriber due to the move can be eliminated.

Further, by adjusting the connection information in the subscriber line sorting device, it is possible to reduce the vacancy of the subscriber line interface circuit in the exchange and improve the accommodation efficiency of the subscriber line, and to improve the use efficiency of the exchange equipment. Can be increased.

[Brief description of the drawings]

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

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

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

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

FIG. 5 is a timing chart of subscriber signals on highways 130 to 138 in FIG. 2;

FIG. 6 is a timing chart of subscriber signals on highways 140 to 148 of FIG. 2;

FIG. 7 shows 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 on highways 170 and 177 in FIG.

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

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 subscriber line sorting 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 multiplexing / demultiplexing device 3,3x ISDN terminal 4,4y Analog telephone 50-57 Demultiplexer / multiplexer 60-67 ISDN exchange 70-77 Analog exchange

──────────────────────────────────────────────────続 き Continued on the front page (73) Patent holder 000005223 Fujitsu Limited 4-1-1, Kamidadanaka, Nakahara-ku, Kawasaki-shi, Kanagawa (72) Inventor Kazuhiro Okashita 5-7-1 Shiba, Minato-ku, Tokyo NEC Corporation (72) Inventor Nobuhiko Uema 5-7-1 Shiba, Minato-ku, Tokyo NEC Corporation (72) Inventor Tetsuya Funabashi 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone (72) Inventor Hirofumi Horikoshi 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Koichi Shimizu 216 Totsukacho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Within Business Unit (72) Inventor Takuya Tsuruoka 1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric Industry Co., Ltd. (72) Inventor Junichi Fujii Kanagawa Nakahara-ku, Kawasaki Kamikodanaka 1015 address Fujitsu within Co., Ltd. (56) Reference Patent flat 5-236093 (JP, A) JP flat 4-2297 (JP, A) (58) investigated the field (Int.Cl. ⁷ , DB name) H04M 3/00

Claims (1)

(57) [Claims] 1. An uplink multiplexed signal in which subscriber signals from a plurality of subscriber lines are stored in predetermined time slots, and a subscriber stored in each time slot in the input downlink multiplexed signal. A multiplexer / demultiplexer for demultiplexing and outputting signals to predetermined subscriber lines, and a subscriber signal stored in each time slot of an uplink multiplexed signal from the multiplexer / demultiplexer is demultiplexed and output to a predetermined exchange. And a demultiplexing / multiplexing device for outputting a downstream multiplexed signal in which a subscriber signal from each exchange is stored in a predetermined time slot to a demultiplexing device, wherein the multiplexing / demultiplexing device and the A subscriber signal which is installed between the demultiplexer and the multiplexing device and stored in each time slot in each of the multiplexed signals transmitted between the respective devices is transmitted to a predetermined timer. By switching connection to the slot, a subscriber line distribution device for accommodating a subscriber line to an arbitrary exchange, the subscriber line distribution device, the 8-bit wide subscriber signals within each multiplexed signal Channel signal separating means for separating two B-channel signals and a 2-bit D-channel signal, synchronizing and outputting the D-channel signal to each B-channel signal one bit at a time , Are allocated to the same bit position in the same time slot.
Serial / parallel conversion means for converting the placed 8-bit B-channel parallel signal, and the D-channel signal separated and output by the channel signal separation means to the B-channel corresponding to the D-channel signal
The same bit position in the same time slot as the channel parallel signal
Multiplexing means for multiplexing and outputting as a 1-bit D-channel multiplexed signal arranged in a location, the B-channel parallel signal from the serial / parallel converting means, and the D-channel multiplexed signal from the multiplexing converting means. Switch that collectively processes as a parallel signal based on the connection information set in advance, and the same time slot that is exchanged by the time switch.
And a parallel / serial converting means for converting Tsu City of the 8-bit B-channel parallel signals arranged in the same bit position in the serial signal, exchanged processed by the time switch, said B channel
The same bit position in the same time slot as the parallel signal
Demultiplexing means for the D-channel multiplexed signal of one bit arranged to separate outputs, the 8-bit output from the parallel / serial converting means
From the two B-channel signals having a width of
Two 1-bit bits output in synchronization with each B channel signal
By integrating the D-channel signal to generate the original subscriber signal, subscriber lines, characterized in that it comprises a channel signal integration means for outputting a new multiplexed signal stored into a predetermined time slot Sorting device.