JPS627236A - Information transmission system for pcm branch relay system - Google Patents

Abstract

PURPOSE:To give fault information of own section to other section by utilizing each the 8th bit of a flag F and a ringer signal Sig of each frame comprising a signal of each channel and using the bit as other section information. CONSTITUTION:If a fault takes place at a terminal station section 51 between a PCM terminal equipment 1 and a branching relay device 5, the 8th time slot note 1 of the flag F and the ringer Sig is used to send the number and fault information of the own system to a branch relay section 55 of the branch relay section 5. The relay section 55 uses similarly the 8th time slot note 1 of the flag F and the ringer Sig to send the fault information to the terminal station sections 52, 53, 54. The terminal station section 52-4 receive the fault information from the relay section 55, superimposes the section information causing a fault for the 8th time slot of the flag F and the ringer Sig and sends respectively to opposite PCM terminal stations 2-4. Thus, the generation of a fault between the PCM terminal station 1 and the terminal station section 51 is communicated to the PCM terminal stations 2-4 at the outside of the section.

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] In a small-capacity PCM transmission system including a branch repeater, information in a non-intervening section is transmitted to other sections by allocating specific bits.

[Industrial application field]

The present invention relates to a small-capacity PCM digital transmission system, and particularly to a system for transmitting information such as alarm contents in a system including a branch repeater.

Conventionally, in small-capacity PCM systems including branch repeaters, alarm information, etc., was transferred between opposing stations, but other information was not transferred, and information was transferred from stations that were not opposing. Since information on other sections cannot be received, complete information on other sections is not available.This improvement was strongly desired.

[Conventional technology]

FIG. 2 is a diagram showing an example of a PCM transmission system composed of multiple sections.

In the figure, 1.2.3 and 4 are PCM terminal devices, 5 is a branch relay device, 5I, 5□, and 53.54 are terminal units of the branch relay device 5, and 5. is a branch relay section of the branch relay device 5.

In a PCM transmission system consisting of multiple sections as shown in FIG. 2, the PCM terminal device 1 is connected to the terminal section 5.
, the PCM terminal station device 2 faces the terminal section 5□ of the branch repeating device 5, the PCM terminal station W3 faces the terminal section 53 of the branch repeating device 5, and the PCM terminal device 4 faces the terminal section 5□ of the branch repeating device 5. 5
The branch relay unit 5 of the branch relay device 5
．． is connected to each of the terminal stations 51 to 54 to perform a branching and relaying function.

In this case, in the conventional system, alarm signals are mutually communicated between the PCM terminal device 1 and the terminal section 51, so that each can grasp the state of the other party.

This is the same between the PCM terminal equipment 1 and the terminal unit 5, between the PCM terminal equipment 1 and the terminal unit 53, and between the PCM terminal equipment 1 and the terminal unit 54.

[Problem that the invention seeks to solve]

However, in the conventional small-capacity PCM system, although alarm signals are communicated between opposing devices, they are not communicated to other devices. That is, PCM terminal equipment 1
- The alarm signal between the terminal station 51 remains within this section and is not communicated to equipment in other sections, such as pcM terminal station equipment 2.3.4, etc., so other sections do not know the situation other than their own section. There was a drawback that there was no such thing.

[Means for solving problems]

The above problem is as shown in FIG. 1, the first frame consists of an 8-bit flag F and signals of each channel, the second frame consists of an 8-bit ringer signal Sig and signals of each channel, In a small-capacity PCM communication system in which the third frame is composed of signals obtained by inverting 0 and 1 of the first frame, and the fourth frame has the same structure as the second frame, each of the flag F and the ringer signal Sig is 8th
This problem can be solved by using the bit number as other interval information.

[Effect]

According to the invention, the flag F and ringer signal S of each frame
By using the 8th bit of 'ig and using this as other section information, it becomes possible to flow fault information of the own section to other sections.

〔Example〕

FIG. 1 is a diagram for explaining one embodiment of the present invention, and FIG. 1a) is a frame configuration, and FIG. 1 middle) is an explanatory diagram of a flag F and a ringer Sig.

Now, the case of the 6-channel 1iPCM system will be explained. Each channel has an 8-bit configuration.
125μ5 (56 bits = 8 bits x 7) as shown in l
The four types of frames ■, ■, ■, ■ are repeatedly sent in sequence.

The first frame ■ consists of an 8-bit flag F and CHI to CH6 signals each having an 8-bit configuration, and the second frame ■ consists of an 8-bit ringer Sig and CHI to CH6 signals each having an 8-bit configuration. The third frame ■ is the same as the first frame, but O and 1 are reversed, and the fourth frame ■ is the same as the second frame.

Furthermore, flag F and ringer Sig are both 8 as mentioned above.
In terms of bit organization, the usage status of the channel/time slot CTS is shown in FIG. 1(b).

That is, the first to sixth time slots of flag F are synchronization signals, for example, 110010, the seventh time slot # is used as a game warning, and the eighth time slot # is used as a game alarm.
tel is used for information outside the section.

The 1st to 6th time slots of Ringer Sig are for each CH.
The 7th time slot* is used for remote loopback, and the 8th time slot n
otel is used for information outside the area.

In this way, the 8th time slot note l of the flag F1 ringer Sig is used for information outside the section, and the above 4.
By combining a plurality of n types of frames I, n, ■, ■ into one unit, 4n bits of information can be transmitted.

For example, the eighth time slot note of the flag F1 ringer Sig in the first branch of the PCM terminal station terminal station device in FIG.
The own system number and fault information are sent to the end station using 5. is transmitted to the branch relay unit 5 of the branch relay device 5, and the branch relay unit 5 similarly uses the flag F and the eighth time slot notel of the ringer Sig to transmit the signal to the terminal unit 57, the terminal unit 53, and the terminal unit 54. Convey failure information.

The terminal section 5□, the terminal section 51, and the terminal section 54 are connected to the branch relay section 5,
The flag F and the ringer Si
The error occurrence section information is loaded onto the eighth time slot of g and sent to the opposing PCM terminal device 2, the opposing PCM terminal device 3, and the opposing PCM terminal device 4, respectively.

In this way, the PCM terminal equipment 1 is connected to the PCM terminal equipment 2, PCM terminal equipment 3, and PCM terminal equipment 4 outside the section.
It becomes possible to notify the occurrence of a failure between the terminal units 51.

〔Effect of the invention〕

As explained in detail above, according to the present invention, there is a great effect that information outside the section can be known.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining one embodiment of the present invention. FIG. 2 is a diagram showing an example of a PCM transmission system composed of multiple sections. In the figure, 1, 2, 3, and 4 are respectively PCM terminal devices, 5 is a branch repeater, 51, 5□, 5:l, 5a are terminal parts of the branch repeater 5, and 5 is the branch repeater 5. This is a branch relay section. (b) In an example of the month of ``Hohikari'', a child-rearing plant is used for 1 mouth + ζM animals, 1 piece, and 1 month.
Grass powder-Ronri0mine2 mouth

Claims (1)

[Claims] The first frame is composed of an 8-bit flag (F) and a signal of each channel, the second frame is composed of an 8-bit ringer signal (Sig) and a signal of each channel, and the third frame is composed of an 8-bit ringer signal (Sig) and a signal of each channel. In a small-capacity PCM communication system in which a frame is composed of a signal obtained by inverting 0 and 1 of the first frame, and a fourth frame has the same structure as the second frame, the flag (F) and the ringer signal ( An information transfer method for a PCM branch relay system, characterized in that each eighth bit of Sig) is used as other section information.