Signal matching apparatus for exchanging signals between an analog switching system and a digital switching system
AssigneeSamsung Electronics Co., Ltd.
InventorHyun-Soo Je
Life of this patent
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Abstract
A signal matching apparatus for exchanging signals between a digital switching system and a two-wire long distance subscriber line signal switching system comprises a first PCM equipment for converting a 4-wire E1 signal of the digital switching system into a 4-wire analog signal, and for connecting a 4-wire analog signal of the long distance subscriber line signal switching system into a 4-wire digital signal transferred to the digital switching system, and a second PCM equipment for converting the 4-wire analog signal of the first PCM equipment into a 2-wire signal, and for converting the analog signal of the long distance subscriber line signal switching system into a 4-wire analog signal transferred to the first PCM equipment.
Claims12
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;
- and
- converter 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.
An apparatus for exchanging signals between a digital switching system and a 2-wire long distance subscriber line signal switching system, comprising:
- converter means connected to said digital switching system via a 4-wire transmission line for converting a 4-wire signal from said digital switching system into a 2-wire signal for transfer to said 2-wire long distance subscriber line signal switching system, and for converting a 2-wire signal received from said 2-wire long distance subscriber line signal switching system into a 4-wire digital signal for transfer to said digital switching system;
- and
- first and second amplifiers connected in series between said converter means and said 2-wire long distance subscriber line signal switching system for amplifying said 2-wire signal received from said 2-wire long distance subscriber line signal switching system prior to provision to said converter means.
Dependencies are inferred from the claim text.