International Switching Symposium record

International Switching Symposium record

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These are especially data concerning the state of the line or trunk or tie-line dial information and classes of service of the line, trunk or tie-line ... signalling procedure for the free or busy state of the station and for an initiating signal for starting answer-back and manual call transfer. ... In the case of the III W 6030 it is a very simple pircuit, which consists on the central office side in essential of a ringing-toneanbsp;...

Title:International Switching Symposium record
Author:IEEE Communications Society
Publisher: - 1972


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