JPH03187556A - Subscriber line carrier system - Google Patents

Abstract

PURPOSE:To freely change the channel number of a subscriber unit facing to a central station unit by setting the multiplexed channels of the central station unit and the subscriber unit to be connected to a subscriber line from an exchange by a control command added into a digital signal. CONSTITUTION:A central station unit (COT) 1, subscriber unit (RT) 2, extended subscriber unit (ART) 3, personal computer 5 and subscriber terminal 8 are provided. The control command for deisgnating the multiplexed channel numbers is sent out as a bit for control signal in the digital signal and the channels of the respective units 1-3 are set. Thus, correspondence between the channel number of a COT 1 side channel board 6 and the channel of a facing ART 3 side channel board 7 can be freely changed while loading an interface board 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a subscriber line transport system, and particularly to a subscriber line transport system that uses subscriber lines in a multiplexed manner.

[Conventional technology]

Conventional subscriber line transport systems include a central office equipment (hereinafter referred to as COT) that has an interface with the exchange and a multiplexing (hereinafter referred to as MUX) function installed in the central office building, and a central office equipment (hereinafter referred to as COT) that has an interface with the exchange and a multiplexing (hereinafter referred to as MUX) function, Subscriber equipment (hereinafter referred to as R) that is installed and has a subscriber side interface and MUX function
(hereinafter referred to as ART), an extended RT (hereinafter referred to as ART) that is installed closer to the subscriber terminal than the RT and has the same type of subscriber side interface as the RT, and an RT and ART.
and an interface board mounted on the RT, which has a digital signal interface function for connecting the RT. ART facing COT Ill channel board
The side channel board is R where the interface board is mounted.
The system was determined by the position within T.

[Problem to be solved by the invention]

In the conventional subscriber transport system described above, the RT side channel facing the COT side channel board is determined by the position in the RT where the interface board is mounted, so the RT side channel faces the COT side channel board. Correspondence of channel numbers on ART side channel board,
There is a problem in that it is not possible to freely change the interface board while it is installed.

[Means to solve the problem]

The subscriber line carrier system of the present invention includes a central office device having an interface with an exchange and a multiplexing function, a subscriber device that plays with the central office device and has an interface with a subscriber side and the multiplexing function. An extended subscriber device is installed between this subscriber device and the subscriber terminal and has the same functions as the subscriber device, and a control command specifying a multiplexed channel number is used as a control signal in a digital signal. It is characterized in that it is sent as a bit and the channel setting of each of the devices is performed.

〔Example〕 Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

The subscriber line transport system of this embodiment has a C0Tl installed in the central office building, which has the functions of an interface with an exchange and a MUX, and a subscriber side interface and M[ R with JX function
T2, ART3 which is installed closer to the subscriber terminal 8 than RT2 and has the same type of subscriber side interface as RT2, and a digital signal interface function and control including control information bits that connects RT2 and ART3. A control command is sent to the ART side channel board 7 using the information bit, and the C that faces the ART side channel board 7
It has a function that allows you to arbitrarily select the OT side channel board 6.
It comprises an interface board 4 mounted on the T2, and a personal computer 5 for setting information for selecting the COT side channel board 6 facing the A RT l@ channel board 7 for the interface board 4.

Next, to explain the operation, the COT side channel board 6
The setting of the channel number on the ART side channel board 7 facing the
Control commands input from C0Tl and RT2 are transmitted to the interface board 4 mounted on RT2 through digital signals, and the control commands are further transmitted within the interface board 4 to the ART side channel board 7 mounted on ART3. It is converted into a control command format to perform the command, is transmitted to the ART side channel board 7 by the control signal bit in the digital signal between the interface board 4 and the ART 3, and is set in the ART side channel board 7. be exposed.

〔Effect of the invention〕

As explained above, the present invention enables the setting of multiplexed channels of the central office equipment and the subscriber line equipment connected to the subscriber line from the exchange using control commands added to the digital signal. This has the effect that the channel number of the subscriber device facing the device can be changed freely.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention. 1...Central office equipment (COT), 2...Subscriber equipment (RT), 3...Extended subscription equipment (ART)
, 4...Interface board, 5...Personal computer, 6...COT side channel board, 7...
ART side channel board, 8...Subscriber terminal.

Claims (1)

[Scope of Claims] 1. A central office device having an interface with an exchange and a multiplexing function, a subscriber device playing with the central office device and having an interface with a subscriber side and the multiplexing function, and a subscriber device having the multiplexing function and an interface with a subscriber side; an extended subscriber device that is installed between the subscriber device and the subscriber terminal and has the same functions as the subscriber device; A subscriber line transport system characterized by transmitting data and setting channels for each of the devices. 2. The subscriber line transport system according to claim 1, further comprising a personal computer connected to said central office device and outputting said control commands.