Miscellaneous North Electric Switching Systems
(last updated: 16-May-2015 09:31)
NX-1D
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"NX-1E, an Electronically Controlled Crossbar Switching System", ITCT
COM-18:6 Dec 1970 pgs 734-739.
TSD
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"Toll Service Desk: An Improved Concept of Telephone Toll Traffic
Control", ITCT COM-17:6 Dec 1969 pgs 606-615 (also ICC'69).