Electronic exchange apparatus

Details Electronic exchange apparatus Electronic exchange apparatus

1993-08-10

1995-10-24

Chin, Stephen

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Of centralized switching system

375 10, 375 15, H04M 129, H04M 308, H04M 322

Patent

active

054616620

ABSTRACT:
An electronic exchange apparatus which is maintained by remote control based on information supplied from a maintenance terminal through a communications network, comprises a memory for storing called party number information representing a number for maintaining the electronic exchange apparatus and calling party number information representing a number of the maintenance terminal for allowing a maintenance operation, and a controller for, when a call is received from the communications network, detecting whether called party number information and calling party number information included in a message transmitted together with the call, coincide with the called party number information and the calling party number information stored in the memory, respectively, and for, when the information included in the message coincides with the information stored in the memory, recognizing the call as a maintenance call for maintaining the electronic exchange apparatus, thereby setting the electronic exchange apparatus in a maintenance mode.

REFERENCES:
patent: 4639557 (1987-01-01), Butler et al.
patent: 4782506 (1988-11-01), Sevcik
patent: 5276727 (1994-01-01), Kim et al.

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