Title: Parallel control of a telephone switching network

Abstract: A switching system is disclosed for interconnecting both the audio and wideband communication leads of communicating telephone stations. The system utilizes an auxiliary switching network separate from the regular audio network for handling the wideband portion of each interconnection. The connections through the auxiliary network are identified for control purposes by tracer signals applied to a called line and detected on the calling line. The tracer signals are applied and detected without interfering with the regular switching network and without major modifications to the existing network.

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Inventors: Gorman, II, Patrick Henry (Little Silver, NJ, US)

Application Number: 649749
Filing Date: 1976-01-16
Publication_date: 1976-12-14
Assignee: Bell Telephone Laboratories, Incorporated (Murray Hill, NJ)
Primary Class(es): 379/90.01 348/14.11, 379/235, 379/246
Other Classes:
US Patent Ref:

3335226

Aug, 1967

Michael et al.

179/18.

Other Refs:
Primary Examiner: Cooper, William C.
Assistant Examiner:
Attorney: Tannenbaum; David H.