Trunk interface for the ISDN system using two different signalli

Details Trunk interface for the ISDN system using two different signalli Trunk interface for the ISDN system using two different signalli

1992-12-01

1994-04-19

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

3701051, 3701101, H04J 312

Patent

active

053053150

ABSTRACT:
A trunk interface for an ISDN system which uses two different carriers of CEPT and T1. The trunk interface is for use in an apparatus in order to interface with a central office exchange or the other PABX. The trunk interface includes a DIP switch, a primary rate transceiver and a frame aligner in order to support the CEPT and T1. carriers. The trunk interface communicates with the high order level of the system through a serial port of a D channel controller, so that a microprocessor without a special communication module can be utilized in the trunk interface.

REFERENCES:
patent: 5012470 (1991-04-01), Shobu et al.
patent: 5034948 (1991-06-01), Mizutani et al.
patent: 5056086 (1991-10-01), Libonati
patent: 5077735 (1991-12-01), Myung et al.
patent: 5177738 (1993-01-01), Dell'oro et al.

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