Data synchronization circuit

Details Data synchronization circuit Data synchronization circuit

1978-10-26

1980-03-04

Robinson, Thomas A.

Telegraphy

Systems

Line-clearing and circuit maintenance

H04L 700

Patent

active

041918495

ABSTRACT:
A data synchronization circuit for use in an automatic identification of outward dialing system (AIOD). The present invention automatically synchronizes streams of binary data sent as lengthy messages between a private automatic branch exchange (PABX) and a telephone switching center. The binary information 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 transmitted in two-out-of-five code. Synchronization is provided by controlling the output of an included clock in response to received binary state changes.

REFERENCES:
patent: 3967061 (1976-06-01), Dobias
patent: 4007329 (1977-02-01), McClain et al.

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