H - Electricity – 04 – L
Patent
H - Electricity
04
L
340/84
H04L 5/14 (2006.01) H04B 17/00 (2006.01) H04B 17/02 (2006.01) H04J 3/12 (2006.01) H04J 3/14 (2006.01) H04M 11/06 (2006.01)
Patent
CA 1178683
ABSTRACT An orderwire scheme for a multichannel repeatered com- munication network contains an auxiliary communication link that is coupled to communication sites along the network and is configured of a pair of orderwire links each formed of a con- ventional interstitial copper wire pair. To carry out supervi- sory functions with respect to each of the stations along the communication link, messages are conveyed from a control facil- ity coupled to or as part of the network to respective stations along the link in the form of command instructions. These messages may contain a request for information from the ad- dressed site as to equipment conditions at the site or a direc- tive that the equipment at the site perform a particular task. In reply to the command message sent to it the addressed site returns a response message back to the control facility repre- sentative of the action taken including any data requested by the instructions. In addition to providing a distributed communication link over which such supervisory command and response messages can be transmitted among the stations along the orderwire link, the present invention offers a further facility for conveying voice communications over the same orderwire link. To implement the exchange of command and response messages among the various sites of the network, supervisory signals are transmitted using digitally encoded ON/OFF keying of frequency tone signals.
376413
Nixon Thomas J.
Seiler Norman C.
Waschka George A. Jr.
Harris Corporation
Shapiro Cohen
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