Data synchronization circuit

Details Data synchronization circuit Data synchronization circuit

H - Electricity

04

M

344/80

H04M 3/00 (2006.01) H04L 7/033 (2006.01) H04L 25/40 (2006.01)

Patent

CA 1128630

TITLE DATA SYNCHRONIZATION CIRCUIT ABSTRACT OF THE INVENTION A data synchronization circuit for use in an automatic identification of outward dialing system (AIOD). The present invention automatically synchro- nizes streams of binary data sent as lengthy messages between a private automatic branch exchange (PABX) and a telephone switching center. The binary informa- tion transmitted to the switching center consists of the calling subscriber's identity within the PABX and the identity of the trunk circuit connecting the PABX to switching center. This information is trans- mitted in two-out-of-five code. Synchronization is provided by controlling the output of an included clock in response to received binary state changes.

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