Signalling transmission system

Details Signalling transmission system Signalling transmission system

1989-04-25

1990-11-20

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 681, H04J 312

Patent

active

049724118

ABSTRACT:
A signalling transmission system is disclosed which consists of a transmitting module including a signalling variation detecting unit and a signalling synthesization unit, and a receiving module including a signalling flag detecting unit and a signalling separation unit. The signalling synthesization unit makes composition signals by inserting signalling signals into voice signals together with a flag when signalling variations are detected by the variation detecting unit. A flag detecting unit detects a flag contained in the composition signals received by the receiving module and instructs the separating unit to separate the signalling signals from the voice signals contained the composition signals when the flag shows that the composition signals include the signalling signals. The signalling signals and the voice signals are therefore output from the receiving module.

REFERENCES:
patent: 4032719 (1977-06-01), Blasbalg
patent: 4434486 (1984-02-01), Barner
patent: 4538263 (1985-08-01), Gabrielli et al.
patent: 4630262 (1986-12-01), Callens et al.
Japanese Patent Application Public Disclosure No. 43030/1986.
Japanese Patent Application Public Disclosure No. 78235/1986.
Japanese Patent Application Public Disclosure No. 157099/1986.

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