Signalization coordinator for PCM switching system

Details Signalization coordinator for PCM switching system Signalization coordinator for PCM switching system

1975-12-18

1977-04-26

Robinson, Thomas A.

H04J 300

Patent

active

040202909

ABSTRACT:
An intermediate switching station or exchange, designed to establish temporary connections between calling and called lines of a telephone or other telecommunication system, is connected via n multichannel links to as many trunk terminals, the m channels of each link being represented by or converted into respective time slots of a PCM message frame of (m+2) time slots which also include a special time slot for switching codes. The code words from the special time slots of all incoming links are interleaved in a PCM switching frame of (m+2) time slots, with (n+1) such frames constituting a recurrent superframe carrying switching codes from all lines served by the exchange. A signalization coordinator converts the switching codes extracted from the superframe into signals for the actuation of a switching-control unit and reconverts response signals from that unit into switching codes to be inserted into outgoing message frames.

REFERENCES:
patent: 3768079 (1973-10-01), Bittermann et al.
patent: 3885103 (1975-05-01), Smith et al.
patent: 3908092 (1975-09-01), Hight et al.

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