Telephone service system in a asynchronous transfer mode private

Details Telephone service system in a asynchronous transfer mode private Telephone service system in a asynchronous transfer mode private

1997-11-24

2000-08-29

Vu, Huy D.

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

370242, 370397, 370401, 370464, G01R 3108, H04L 1228, H04J 1500

Patent

active

061118796

ABSTRACT:
A telephone service system in an ATM private network, includes: a PSTN interface unit for performing PCM with an analog telephone signal transmitted from a channel in a PSTN, converting the modulated data into a CEPT frame before sending it to a subscriber, performing the PCM with CEPT frame data, from a subscriber, and converting the modulated data into an analog telephone signal, before forwarding it to the PSTN; a first ATM cell processing unit for converting the CEPT frame data from the PSTN interface unit into an ATM cell, converting an ATM cell from a subscriber into CEPT frame data, and sending it to the PSTN interface unit; an ATM switching unit for switching the ATM cell from the first ATM processing unit to the subscriber, and switching the ATM cell from the subscriber to the PSTN; a second ATM processing unit for converting the ATM cell from the ATM switching unit into CEPT frame data before sending it to the subscriber, and converting the CEPT frame data from the subscriber into an ATM cell before sending it to the ATM switching unit; and a subscriber line interface unit for converting the CEPT frame data from the second ATM processing unit into an analog telephone signal before sending it to a relevant subscriber, performing the PCM with the analog telephone signal from the subscriber, and converting the PCM data into CEPT frame data.

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patent: 5930250 (1999-07-01), Klok et al.
patent: 5963555 (1999-10-01), Takase et al.

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