JPH05327640A - Subscriber connection system for subscriber transmitter - Google Patents

Abstract

PURPOSE:To revise accommodation of subscribers without actual visit to a site simply in a short time with a few unskilled persons in the subscriber connection system for the subscriber transmitter. CONSTITUTION:A subscriber transmitter 10 having a multiplexer/demultiplexer 11 and plural subscriber terminators 12 is provided with a channel changeover panel 21 between the multiplexer/demultiplexer and the plural subscriber terminators, and each input output terminal 13 of the multiplexer 7 demultiplexer and each subscriber telephone set are connected with a predetermined correspondence by adjusting the channel changeover panel even after the plural subscriber terminators and the plural subscriber telephone sets are connected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subscriber connection system in a subscriber transmission device. The large number of subscribers housed in a switch are often located near the switch and are usually directly connected to the switch. However, it is often the case that a group of many subscribers is located far from the switch.
In such a case, it is extremely uneconomical to route the cables from the exchange to the distant group of subscribers on a one-to-one basis.

Therefore, in recent years, subscriber transmission equipment (Di
gital Loop Carrier) has been proposed and widely used. This subscriber transmission device is equivalent to a remote station if the exchange is a central station, and the central station and the remote station are connected by a single digital transmission path. Then, a high-order group multiplexed signal is transmitted on this digital transmission path. Thus, a remote group of subscribers can be economically linked to a central exchange.

The present invention describes the connection between the subscriber transmission device and a plurality of subscriber telephones under the control of the subscriber transmission device.

[0004]

2. Description of the Related Art FIG. 5 is a diagram for explaining the positioning of a subscriber transmission device. However, this is only an example, and there are other application examples. In the figure, the subscriber transmission device 10 is
It is basically composed of a separation device 11 and a plurality of subscriber terminating devices 12. The multiplexer / demultiplexer 10 is connected to a central exchange 18 via a digital transmission line 17 including a repeater 16. Normally, the length of the digital transmission line 17 extends over several tens of kilometers.

A plurality of subscriber terminal devices 12 are respectively connected to a plurality of subscriber telephone sets 14 and multiplexed / demultiplexed.
A / D (analog / digital) conversion is added to the subscriber signal from the demultiplexer 11 or D / A (digital / analog) conversion is added to the subscriber signal to the multiplexer / demultiplexer 11.

[0006]

Conventionally, the connection between the subscriber transmission device 10 and each telephone set 14 has been almost manually performed. The work is (1) telephone numbers (# 001, # 002, # 003 ... Assigned to each input / output terminal 13 of the multiplexer / demultiplexer 11)
・) Is specified first.

(2) It is confirmed which telephone number (# 001, # 002, # 003 ...) Each subscriber terminating device 12 corresponds to. (3) Each subscriber termination device 12 whose telephone number has been confirmed,
Each subscriber telephone set 14 to which the corresponding telephone number is assigned
Is connected by wiring. However, the operations according to (1), (2) and (3) above have various problems.

First, a plurality of personnel who should perform the above work must be dispatched to an area where there is a distant subscriber transmission device 10 and a group of subscriber telephone sets 14, which greatly increases the total work time and personnel. There is a first problem that the cost is increased. The second problem is that once the wiring is done, it is considerably troublesome to re-wire the wiring, and thus the operator needs a great deal of attention and skill.

When a so-called subscriber accommodation replacement is required due to a change in telephone number or the like, a plurality of workers must be dispatched to a distant place even if this is only for one subscriber, which is uneconomical. That is, there is a third problem. As a natural result of the above problem, there is a fourth problem that the time until the service can actually be provided to the subscriber, that is, the service start time is delayed.

Therefore, in view of the above problems, the present invention enables subscriber accommodation replacement, which enables a small number of personnel to perform subscriber accommodation replacement easily and in a short time without requiring skill, and even without actually going to the site. It is an object to provide a subscriber connection method for a device.

[0011]

FIG. 1 is a diagram showing the principle configuration of the present invention. According to the present invention, the speech path switching board 2 is provided between the plurality of subscriber terminating devices 12 and the multiplexer / demultiplexer 13.
1 is provided and the communication path switching board 21 is adjusted so that each input / output terminal 13 of the multiplexer / demultiplexer 12 and each subscriber telephone set 14 are connected in a predetermined correspondence relationship.

[0012]

Describing with a concrete example, conventionally, each telephone number (# 001, # 002, # 003 ... # 00N) assigned to each input / output terminal 13 of the multiplexer / demultiplexer 13 is used.
And the telephone number (#
1, # 2, # 3 ... #N) had to be carefully wired (represented schematically by W in the figure) so as to have a complete one-to-one correspondence. That is, W in the figure
The parts marked with had to be carefully connected as indicated by the dotted lines for phones # 1, # 2 and #N.

However, according to the invention, the wiring (W)
Can be totally left to the operator. That is, the wiring may be routed as shown by the solid line in the figure. However, if such an arbitrary wiring is left, the subscriber signals are "2" and "1" in the figure.
Frames are assembled in the time slot order as indicated by "3" ... (Corresponding to # 2, # 1, # 3 ...) and sent to the multiplexer / demultiplexer 11. It should be noted that this figure illustrates an example of upstream transmission, but the same applies to downstream transmission.

However, if such a time slot order is kept as it is, the time slot order "1""2""3" ... Which the input / output terminals 13 of the multiplexer / demultiplexer 11 receive.
I am not able to do regular communication because it is off. Therefore, the above deviation is adjusted by the communication path switching board 21. How to adjust is determined by an adjustment input from the outside. If this adjustment input is transmitted from the exchange 18 side in FIG. 5, without dispatching personnel to the site,
Subscribers can be replaced by remote control from the center. Therefore, in the field, any subscriber terminal device 12 may be connected to any subscriber telephone set 14. This lightens the mental burden on the operator, shortens the work time, and eliminates the need for wiring confirmation work in the field.

[0015]

FIG. 2 is a diagram showing an embodiment according to the present invention. It should be noted that the same reference numerals or symbols are given to the same components throughout the drawings. As shown in the figure, the speech path switching board 21 temporarily holds each subscriber signal transmitted and received by each of the plurality of subscriber terminating devices 12 (RAM (Ra).
ndom Access Memory) 31 and an electrically rewritable ROM (Read) that holds the communication path setting information for accessing the RAM 31 according to the above-mentioned predetermined correspondence.
Only Memory) 32. Then, the communication path of the subscriber signal formed on the RAM 31 is switched according to the contents of the ROM 32.

The call path setting information given from the outside is held in the ROM 32, which is, for example, an EEPROM, and the RAM 31 is subsequently accessed according to this information. Other configurations in FIG. 2 are as already described. In addition, the block of 35 represents a concentrating stage.
FIG. 3 is a diagram showing a detailed example of the speech path switching board and its surroundings.

The example of this figure is drawn along the example of FIG. 1. When so-called sequential writing is performed on the RAM 31, subscribers corresponding to telephone numbers # 2, # 1, # 3, ... Each subscriber signal from the telephone set 14 is sequentially written in the RAM 31. The ROM 32 (FIG. 2) for reading each subscriber signal in the RAM 31 is illustrated schematically by an address control memory (ACM) 32-1 and a selector 32-2.
Can be represented by Address control is RA
Address control for M31.

Since it is necessary to send out the respective subscriber signals to the multiplexer / demultiplexer 11 in a predetermined order (# 1, # 2, # 3 ...), the selector 32-2 uses the contacts in the figure. Select in the order of → → →. This order is fixedly designated in advance by the communication path setting information in the memory 32-1. After that, if there is a change, it will be rewritten. In practice, a sophisticated function is added centering on the ROM 32, and for that purpose, a central processing unit (CPU) 41 is provided first. C
The PU 41 and the memory 32-1 are bus-connected, and the communication port 42 is connected to the bus. That is, the ROM 32
The communication path switching board 21 is provided with a communication port 42 for receiving the above-mentioned communication path setting information to be held in (32-1).

The communication port 42 can receive the communication path setting information transmitted by the data link bit from the exchange 18 (FIG. 5) via the digital transmission path 17. Alternatively, the communication port 42 may be the terminal device 46.
It is possible to receive the call path setting information input from.

The communication path setting information transmitted by the data link bit is received via the data link interface 44 in the figure. In this way, the centralized management from the center allows the accommodation of subscribers to be replaced, and there is no need to dispatch workers to the site. On the other hand, when it is necessary to change the subscriber accommodation at the site, the call path setting information can be input from the terminal device 46. The signal from the terminal device 46 is level-converted by the RS232C interface and applied to the communication port 42.

The selector (SEL) 43 switches depending on whether it is a command from the center or a command from the site. This is to prevent information interference at the communication port 42. As the communication port 42, "USAR" (Universal Synchronous / As) found in general personal computer communication is used.
It can be realized at low cost by using a ynchronous Receiver Transmitter) chip.

FIG. 4 is a diagram showing an example of the overall configuration according to the present invention. Although the above description has been made mainly with respect to communication in the upward direction (subscriber telephone 14 → exchange 18), similar communication path switching must be performed for communication in the downward direction. Also, subscribers often exceed 24 multiplexes. FIG. 4 illustrates both the upstream direction and the downstream direction, and also illustrates the case of 24 multiplex or more.

As the RAM, an upward RAM 31U and a downward RAM 31D are separately provided. Then, a bus arbiter 51 is provided so that control does not collide between the up and down directions. The CPU 41 and the communication port 42 connected to the bus arbiter 51 are as described above. In addition, since a plurality of subscriber signals are normally 24 multiplexed as one unit,
Serial / parallel conversion unit 52 having 24 multiplex as one unit
D, 52U and parallel / serial conversion units 53D, 5
A plurality of 3Us are provided, and the selectors 53D and 53U perform the alternative selection.

[0024]

As described above, according to the present invention, the above-mentioned four problems can be solved all at once. In recent years, the spread of an operating system (OS) for centralized management of communication devices has spread the remote monitoring and remote control of the devices and communication networks widely, and it is required to reduce costs such as personnel costs for operation. However, it is well suited to the trend of such technology.

[Brief description of drawings]

FIG. 1 is a diagram showing a principle configuration of the present invention.

FIG. 2 is a diagram showing an embodiment according to the present invention.

FIG. 3 is a diagram showing a detailed example of a speech path switching board and its surroundings.

FIG. 4 is a diagram showing an example of the overall configuration according to the present invention.

FIG. 5 is a diagram for explaining the positioning of a subscriber transmission device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Subscriber transmission device 11 ... Multiplexing / separation device 12 ... Subscriber termination device 13 ... Input / output terminal 14 ... Subscriber telephone 17 ... Digital transmission line 18 ... Switch 21 ... Speech path switching board 31 ... RAM 32 ... ROM 41 ... CPU 42 ... Communication port 44 ... Data link interface 46 ... Terminal equipment

Claims (5)

[Claims] 1. A multiplexer / demultiplexer (11) connected to an exchange (18) through a digital transmission line (17) and a plurality of subscriber telephones (14) respectively, and from the multiplexer / demultiplexer. A / D conversion is added to the subscriber signal of the same or D / A is added to the subscriber signal to the multiplexer / demultiplexer.
In a subscriber transmission device (10) having a plurality of subscriber terminating devices (12) to which conversion is performed, a communication path switching board (between the plurality of subscriber terminating devices and the multiplexer / demultiplexer) is provided. 21) is provided, and the input / output terminals (13) of the multiplexer / demultiplexer and the subscriber telephones are connected with a predetermined correspondence by adjusting the communication path switching board. A subscriber connection method in a subscriber transmission device, comprising: 2. The RAM (31) for temporarily holding each subscriber signal transmitted and received by each of the plurality of subscriber terminating devices (12) in the speech path switching board (21).
And an electrically rewritable ROM (32) that holds the communication path setting information for accessing the RAM according to the predetermined correspondence relationship, and is formed on the RAM according to the contents of the ROM. The subscriber connection system according to claim 1, wherein the communication path of the subscriber signal is switched. 3. A communication port (42) for receiving the communication path setting information to be held in the ROM (32),
The subscriber connection system according to claim 1, wherein the subscriber connection system is provided on the communication path switching board (21). 4. The communication port (42) according to claim 3, wherein the communication path setting information is transmitted from the exchange (18) via the digital transmission path (17) by a data link bit. Subscriber connection method. 5. The subscriber connection system according to claim 3, wherein the communication port (42) receives the call path setting information input from a terminal device (46).