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
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;
Conference_Titel :
Solid State Circuits Conference - Digest of Technical Papers, 1978. ESSCIRC 78. 4th European
Conference_Location :
Amsterdam
