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Publication numberUS3394232 A
Publication typeGrant
Publication dateJul 23, 1968
Filing dateMar 9, 1965
Priority dateMar 9, 1965
Publication numberUS 3394232 A, US 3394232A, US-A-3394232, US3394232 A, US3394232A
InventorsGeorge Riddell, Jaeger Jr Richard J
Original AssigneeBell Telephone Labor Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Telephone system
US 3394232 A
Images(111)
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Description  (OCR text may contain errors)

R. J. JAEGER, JR, ET AL 3,394,232

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TELEPHONE SYSTEM July 23, 1968 R. J. JAEGER, JR. ET AL 3,394,232

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TELEPHONE SYSTEM 111 Sheets-Sheet 12 Filed March 9, 1965 Jul 23, 1968 R. J. JAEGER, JR, ET AL 3,394,232

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July 23, 1968 R. J. JAEGER, JR, ET AL 3,3 3

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July 23, 1968 R. J. JAEGER, JR, ET AL 3,394,232

TELEPHONE SYSTEM 111 Sheets-Sheet 17 Filed March 9, 1965 IPCBW ooIQo 922: JO 823 Q 9 6E EOE mam owm moiE.

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Non-Patent Citations
Reference
1 *None
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3542959 *Sep 28, 1967Nov 24, 1970Nippon Electric CoFour-wire tandem switching network having means for selectively coupling connected trunk circuits to provide additional functions without increasing the number of circuits required in the network
US3773982 *Jul 30, 1971Nov 20, 1973Siemens AgCross-switching circuitry for four-wire exchange installations
US4415773 *Oct 29, 1981Nov 15, 1983Western Electric Company, Inc.Methods of establishing a switching connection within a switching system
Classifications
U.S. Classification379/224, 379/288, 379/250
International ClassificationH04Q3/00
Cooperative ClassificationH04Q3/0004
European ClassificationH04Q3/00B