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United States Patent | 3,567,866 |
Briley , et al. | March 2, 1971 |
In an electronic telephone-switching system a trunk circuit is disclosed for connection to incoming trunks from step-by-step telephone-switching systems. The trunk circuit incorporates delay means for delaying all incoming dial pulses for a predetermined period thereby allowing the switching system sufficient time after trunk seizure to establish a connection from the trunk circuit to a dial pulse receiver by means of a switching network.
Inventors: | Briley; Bruce E. (Countryside, IL), Hachenburg; Victor (Naperville, IL) |
Assignee: |
Bell Telephone Laboratories, Incorporated
(Murray Hill,
NJ)
|
Appl. No.: | 04/736,171 |
Filed: | June 11, 1968 |
Current U.S. Class: | 379/286 |
Current International Class: | H04Q 3/54 (20060101); H04q 001/32 () |
Field of Search: | 179/16.4,1645,18 (TRK)/ |
3004108 | October 1961 | N/A |
2500289 | March 1950 | Kessler |
Applicant citation Bell Laboratories Record March 1950: "Incoming Register Link for No. 5. Crossbar" page 115 et seq.. |