JPH0230236A - Path identification signal transmission system - Google Patents

Abstract

PURPOSE:To confirm the propriety of line edit of a synchronizing multiplex converter in the unit of channels by using a dial signal transmission bit for a path identification signal for each speech path in the state except at dial pulse transmission. CONSTITUTION:After a signal selection section 12 in a sender side digital terminal station equipment 1 selects an SS signal, a CH1 signal and a path signal from a path signal generating section 11, a synchronizing multiplex converter 13 inserts the path signal to a signal bit and sends the result to a transmission line 2. A signal demultiplex section 31 in a reception side digital terminal station equipment 3 demultiplexes the path signal into an SR signal and a path detection section 31 demultiplexes the output of the section 31 into an SR signal and a path signal output. The path detection section 32 decodes the path signal from the demultiplexed path signal output to detect a path destination. Thus, whether or not the line edition is correctly implemented is easily detected by the synchronizing multiplex converter.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a route identification signal transmission system, and particularly to a time slot for transmitting a dial signal in a communication path section of a digital terminal equipment having a path for transmitting a dial signal. The present invention relates to a route identification signal transmission method in which route identification information is added to and transmitted.

[Conventional technology]

Conventionally, digital terminal equipment demultiplexes voice signals and demultiplexes dial signals.
/D, D/A conversion is performed, and the dial signal is simply sampled and transmitted at a maximum of 20 pps dial pulse at a period of 0.75 ms, and no route identification signal is transmitted.

[Problem to be solved by the invention]

In the conventional digital terminal equipment described above, route identification signals are not transmitted, so if the line is sent via a periodic multiplexing terminal equipment with a line editing function, the operation of line editing cannot be confirmed without the line being stopped. The disadvantage is that it has to be done.

[Means to solve the problem]

The route identification signal transmission method of the present invention includes, in a communication path section of a digital terminal equipment having a dial signal transmission path,
On the transmitting side, when transmitting a dial signal, the dial signal is transmitted after transmitting the dial signal transmission pattern.
When there is no change in the dial signal, a route identification signal is transmitted after transmitting a dial signal maintenance pattern, and the receiving side identifies the dial signal transmission pattern and the dial signal maintenance pattern to maintain and maintain the SR line. It is characterized by performing cancellation.

〔Example〕

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

FIG. 1 is a system block diagram showing one embodiment of the route identification signal transmission method of the present invention, and FIG. 2 is a system block diagram showing another example of route detection by the receiving digital terminal equipment in FIG. 1. The block diagram in FIG. 3 is a diagram for explaining the operation in FIG. 1.

Among the signals, the dial pulse has a maximum of 20 ppS and a make rate of 33%, so it is 16.5 m s.

The open pulse width is 33.5 ms. Dial signal is 0
．． It is simply sampled at 75 m s, and even in the geological state with the minimum period of 16.5 ms, 16.570.75 =
There are 22 pieces of information. As shown in FIG. 3, most of the SS signals are in a state of no call (open) or a call (earth) state, and the SS signal changes only for a short period of time.

Therefore, when the changing point of the SS signal is detected and there is no changing point,
A route identification signal is inserted after a certain period of time has elapsed. Unique pattern 1 (
The following 01) is sent. Conversely, when stopping insertion of the route identification signal, unique pattern 2 (hereinafter referred to as 02) is sent out to maintain and release the SR ratio output.

As an example of 01 and U2, a repetition of '1010' or a repetition of '1100°' can be considered.This is because the dial pulse is simply sampled, so at least 22 '
This is because it is a series of 1'' or 0, and the repetition of the above ``1010'' or 1100'' is an impossible pattern.By monitoring this route identification signal at the input or output of a periodic multiplex converter in the middle of the transmission path. , the route can be identified for each audio channel.

This operation will be explained with reference to FIG.

In the transmitting side digital terminal device 1, the SS signal and the route signal outputted from the route signal generator 11 are selected by the signal selection unit 12, and then inserted into signal transmission bits and sent to the transmission line 2. In the receiving side digital terminal device 3, the signal separation section 31 separates the signal into an SR signal output and a route signal output. The direction signal separated by the signal separation section 31 is decoded by the direction detection section 32 to detect the direction light.

Further, by using the monitor device 4 with separation function shown in FIG. 2 as the route detection section 32, the route of each channel can be detected at the multiplexing level. The monitor device 4 with separation function converts the bipolar route signal from the signal separation unit 31 into unipolar by the B/U conversion unit 41, synchronizes it by the synchronization unit 42, and then separates it into each channel by the separation unit 43. Then, the channel selection unit 44 selects a channel for detecting the route,
This device has a function of extracting and outputting a route signal from the data in a separating unit 45, and decoding the output route signal in a route detecting unit 46 to detect the route.

As shown in FIG. 1, the channel CHI of the transmitting digital terminal device 1 is edited by the synchronous multiplex converter 13,
To check the multiplexing level when facing the channel CH24 of the receiving side digital terminal device 3, it is possible to detect the direction light by inputting the output of the synchronous multiplex converter 13 to the monitor device 4 with separation function. can. Further, the direction light can also be detected by inputting the output of the signal separation section 31 to the direction detection section 32.

〔Effect of the invention〕

As explained above, in the present invention, by using the dial signal transmission bit as a route identification signal for each call path in a state other than when dial pulses are being sent, correct editing can be performed when editing a line in a synchronous multiplex converter or the like. This has the advantage that it is possible to check whether the transmission line is operating on a channel-by-channel basis based on the operational status of the transmission line.

[Brief explanation of the drawing]

FIG. 1 is a system block diagram showing one embodiment of the route identification signal transmission method of the present invention, and FIG. 2 is a system block diagram showing another example of route detection by the receiving digital terminal equipment in FIG. 1. The block diagram in FIG. 3 is a diagram for explaining the operation in FIG. 1. 16. , transmission side digital terminal equipment, 2...transmission line,
3... Receiving side digital terminal device, 4... Monitor device with separation function, 11... Route signal generation unit, 1211.
Signal selection unit, 13... Synchronous multiplex conversion device, 31...
Signal separation section, 32.46... Direction detection section, 41...
B/U conversion section, 42...Synchronization section, 43...Channel separation section, 44...Channel selection section, 45...Separation section, Ul, U2...Unique pattern 1.2°

Claims (1)

[Claims] In the communication path section of a digital terminal equipment that has a dial signal transmission path, on the transmitting side, when transmitting a dial signal, the dial signal is transmitted after transmitting the dial signal transmission pattern, and when there is no change in the dial signal, the dial signal is transmitted. A route identification signal is transmitted after transmitting a dial signal maintenance pattern, and the receiving side identifies the dial signal transmission pattern and the dial signal maintenance pattern to hold/release the SR line. Route identification signal transmission method.