An Inregrated Line Continuity Test System for Four Wire Telephone Channels

Abstract

This paper describes a system to check 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… (More)

Cite this paper

@article{Trullemans1978AnIL, title={An Inregrated Line Continuity Test System for Four Wire Telephone Channels}, author={Ch.A. Trullemans and J. Taeymans and P. P. Guebels}, journal={ESSCIRC 78: 4th European Solid State Circuits Conference - Digest of Technical Papers}, year={1978}, pages={126-128} }