G - Physics – 06 – F
Patent
G - Physics
06
F
354/232
G06F 1/00 (2006.01) H04L 25/49 (2006.01)
Patent
CA 1144656
TRANSMISSION OF ADDITIONAL SIGNALS VIA LINE ENCODED DIGITAL TRANSMISSION SYSTEMS BY EMPLOYING RANDOM SIGNALLING OPPORTUNITIES Abstract of the Disclosure At a transmitter of a digital transmission system which uses a redundant transmission code to transmit data, at least one predetermined code combination which occurs randomly in the encoded data is selectively modified, to form a predetermined code violation, in dependence upon an additional signal which is to be transmitted. At a receiver, the predetermined code violation is detected and corrected to reproduce the additional signal and the data. By selection of appropriate code combinations and violations more than one additional signal can be transmitted. The arrangement is particularly suitable for transmission of additional signals, which may comprise protection switching signals or a digital voice channel signal, via fiber optic transmission links using 2AMI encoding. - i -
365439
Haley R. John
Nortel Networks Corporation
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