Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of subscriber loop or terminal
Patent
1987-11-04
1988-08-16
Schreyer, Stafford D.
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Testing of subscriber loop or terminal
379429, 361419, H04M 124
Patent
active
047649500
ABSTRACT:
Apparatus inserted in series in a transmission line connecting subscriber equipment with a telephone central office and which apparatus is responsive to test signals from the central office to determine whether a fault is located on the office side or the subscriber side of the apparatus is enclosed in a housing. A plurality of leads from the apparatus project through an opening in the housing and the leads are connected to electrical terminals of a connector block. The housing in one embodiment has two spaced apart ribs which are lodged between tabs of fanning strips, located on both sides of the terminals. One of the ribs has an end with a width larger than the rest of the rib so that end projects inward from the fanning strip and prevents accidental dislodging of the housing from the connector block. In a second embodiment, the housing is supported by at least one tab from one fanning strip. Testing of the terminals is effected by removing the housing without disturbing the connection of the leads to the terminals.
REFERENCES:
patent: 4213013 (1980-07-01), Perna et al.
patent: 4488008 (1985-12-01), Dellinger et al.
patent: 4560839 (1985-12-01), Dillard
"Teradyne" advertisement-Telephony, Jan. 21, 1985, vol. 208, No. 3, pp. 5 and 6.
Dickey Larry W.
Hughes Philip
American Telephone & Telegraph Company AT&T Bell Laboratories
Newman Harry L.
Schreyer Stafford D.
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