Line switching apparatus

Details Line switching apparatus Line switching apparatus

1992-01-21

1993-02-09

Dwyer, James L.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

379100, H04M 1100

Patent

active

051857847

ABSTRACT:
A line switching apparatus is adapted for use with a communication apparatus which comprises a plurality of lines which are accommodated according to a key number system, a plurality of ports which aer connected to communication terminals, and a matrix switch which couples the lines and the ports. The line switching apparatus comprises an auxiliary apparatus, and a control part for detecting an arbitrary one of the ports which is down and not capable of making a communication, disconnecting the arbitrary port from one of the lines and connecting the one line which is originally connected to the arbitrary port to a port which is originally connected to a line of a last key number, and connecting the line of the last key number to the auxiliary apparatus.

REFERENCES:
patent: 4809321 (1989-02-01), Morganstein et al.
patent: 4870678 (1989-09-01), Adachi
patent: 4930151 (1990-05-01), Walton et al.
patent: 4935955 (1990-06-01), Neudorfer

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