Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line
Patent
1985-09-11
1987-02-24
Schreyer, Stafford D.
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Of trunk or long line
379106, H04Q 900
Patent
active
046463429
ABSTRACT:
A test trunk access controller includes a test trunk interface controller accessed by a subscriber line assigned to a service provider, or other remote metering facility, and a test trunk interface device inter-connecting the test trunk controller with the test trunk device of a local telephone switch.
REFERENCES:
patent: 3899639 (1975-08-01), Cleveley et al.
Hargrave Franklin
Hull, III William L.
Middleton Francisco A.
Smith Mark G.
Zeller, Jr. David A.
Hays Robert A.
ITT Corporation
Schreyer Stafford D.
Van Der Sluys Peter C.
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