System and method for transmitting auxiliary signal in a multiplex communication system

Claim 1

A system for transmitting auxiliary signals used in a multiplex communication system which includes a transmitting terminal, one or plurality of intermediate repeater stations and a receiving terminal, said multi­plex communication system communicating together with a main signal a first auxiliary signal such as a system switching control signal which is necessary only in said transmitting terminal and said receiving terminal and a second auxiliary signal such as an order-wire signal and a low speed data signal which is necessary in at least one intermediate repeater station, and said multiplex communication system is formed by a plurality of channels, each of which is formed by a plurality of time slots, for transmitting said auxiliary signals together with said main signal, comprising: means for inserting said first auxiliary signal separately from said second auxiliary signal in said main signal in said transmitting terminal; means for transmitting said first auxiliary signal without processing said first auxiliary signal in said intermediate repeater station, and means for processing said auxiliary signal in said intermediate repeater station, and after processing said second auxiliary signal, transmitting said second auxiliary signal from said intermediate repeater station to said receiving terminal or next intermediate repeater station.

Claim 2

A system for transmitting auxiliary signals used in a multiplex communication system which includes a transmitting terminal, one or plurality of intermediate repeater stations and a receiving terminal, said multi­plex communication system communicating together with a main signal a first auxiliary signal such as a system switching control signal which is necessary only in said transmitting terminal and said receiving terminal and a second auxiliary signal such as an order-wire signal and a low speed data signal which is necessary in at least one intermediate repeater station, and said multiplex communication system is formed by a plurality of channels, each of which is formed by a plurality of time slots, for transmitting said auxiliary signals together with said main signal, comprising: means for inserting said first auxiliary signal separately from said second auxiliary signal in said main signal in said transmitting terminal; means for transmitting said first auxiliary signal without processing said first auxiliary signal in said intermediate repeater station, and means for processing said auxiliary signal in said intermediate repeater station, and after processing said second auxiliary signal, transmitting said second auxiliary signal from said intermediate repeater station to said receiving terminal or next intermediate repeater station.

Claim 3

A system for transmitting auxiliary signals used in a multiplex communication system according to claim l, wherein said first auxiliary signal is inserted into one of said channels and said second auxiliary signal is inserted into the other of said channels.

Claim 4

A system for transmitting auxiliary signals used in a multiplex communication system according to claim l, wherein said first auxiliary signal is inserted into a main signal in a first channel, said second auxiliary signal is inserted into a main signal in third and fourth channels, and in said transmitting portion, a digital service channel synchronizing signal is added to said first auxiliary signal in a first signal processing portion and to said second auxiliary signal in a second signal processing portion, respectively, and thereafter, said first and second auxiliary signals are inserted into the main signal in said first channel and said third and fourth channels to be output; and in said intermediate repeater station, the signal of said first auxiliary signal is repeated without signal processing, said second auxiliary signal in said third and fourth channels is data processed and taken out in a signal processing means or again data processed in said signal processing means, and thereafter, inserted via an inserting portion into said main signal in said third and fourth channels, be repeated.

Claim 5

A system for transmitting auxiliary signals used in a multiplex communication system according to claim l, wherein said first auxiliary signal is sent by using a first time slot in one channel and said second auxiliary signal is sent by using second time slots different from said first time slot, and said inter­mediate repeater station branches and inserts only said second auxiliary signal in said second time slots.