Communication interface

Details Communication interface Communication interface

1991-03-04

1992-05-26

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 851, 379 94, H04J 312

Patent

active

051174251

ABSTRACT:
A communication interface for the protocol of a layer 1 using an ISDN digital communication network, includes: a first communication controller to execute the communication control for a standard terminal; a second communication controller to execute the communications control for a network terminal device; and a switch between to switch the first and second communication controllers. The first communication controller executes the control as a layer 1 of the ISDN standard terminal. The second communication controller executed the control as a layer 1 of the network terminal device which is connected to the ISDN. The communication interface can execute the two-way connection test separately from the ISDN network and can be used in three modes of the ISDN layer 1 interface, TE layer 1 interface, and NT layer 1 interface.

REFERENCES:
patent: 4242749 (1980-12-01), Takezoe
patent: 4689789 (1987-08-01), Herger
patent: 4722082 (1988-01-01), Furuya et al.
patent: 4792800 (1988-12-01), Fujioka et al.
patent: 4835769 (1989-05-01), Donaghue, Jr. et al.
patent: 4884269 (1989-11-01), Duncanson et al.

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