DocumentCode
516992
Title
An Inregrated Line Continuity Test System for Four Wire Telephone Channels
Author
Trullemans, Ch A. ; Taeymans, J.R. ; Guebels, P.P.
Author_Institution
Bell Telephone Manuf. Cy, Antwerp, Belgium
fYear
1978
fDate
18-21 Sept. 1978
Firstpage
126
Lastpage
128
Abstract
This paper describes a system to cheek the continuity of a four wire "trunk" channel according to the CCITT recommendations. The test sequence is as follows: a loop connection is realized by the remote exchange while a 2 kHz tone is sent on one pair at the originating end. The test is successful when the tone is detected within suitable levels during at least SO ms (1).
Keywords
telephony; CCITT recommendations; four wire telephone channels; four wire trunk channel; integrated line continuity test system; loop connection; Clocks; Counting circuits; Detectors; Digital filters; Dynamic range; Hysteresis; Signal generators; System testing; Telephony; Wire;
fLanguage
English
Publisher
ieee
Conference_Titel
Solid State Circuits Conference - Digest of Technical Papers, 1978. ESSCIRC 78. 4th European
Conference_Location
Amsterdam
Type
conf
Filename
5469025
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