Patent ID: 6185293
Filing Date: 2001-02-06
Classification: H04M

Abstract:
A signal matching apparatus for exchanging signals between a digital switching system and a two-wire long distance subscriber line signal switching system, comprising:PCM equipment means for converting a 4-wire E1 signal input from said digital switching system into a 4-wire analog signal output, and for converting a 4-wire analog signal input into a 4-wire digital signal output which is transferred to said digital switching system; andconverter means for converting the 4-wire analog signal output of said PCM equipment means into a 2-wire signal output, and for converting an analog signal input from said two-wire long distance subscriber line signal switching system into the 4-wire analog signal input which is transferred to said PCM equipment means;said apparatus further comprising amplifier means connected between said converter means and said long distance subscriber line signal switching system for amplifying the 2-wire signal output of said converter means prior to provision to said long distance subscriber line signal switching system, and for amplifying the analog signal input from said long distance subscriber line signal switching system prior to provision to said converter means.