Multiple subscriber implementing method in key phone system

Details Multiple subscriber implementing method in key phone system Multiple subscriber implementing method in key phone system

1996-12-02

1999-12-07

Kuntz, Curtis A.

Telephonic communications

Multi-line or key substation system with selective switching...

Switching or supervision feature

379156, 379161, H04M 100

Patent

active

059996056

ABSTRACT:
A multiple subscriber implementing method in a key phone system having an integrated service digital network trunk card connected to a digital telephone line, a public switched telephone network trunk card connected to an analog telephone line and an internal memory containing a plurality of logic ports and registered numbers each indicating a corresponding called subscriber terminal, including a call reception routine of connecting an incoming call containing a called subscriber number to a specific port of a corresponding called subscriber terminal when the incoming call is received through the digital telephone line and the called subscriber number corresponds to one of the registered numbers contained in the internal memory; and a call transmission routine of registering a called subscriber number and transmitting an outgoing call when the digital telephone line is seized by a private line subscriber.

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patent: 5481605 (1996-01-01), Sakurai et al.
patent: 5513256 (1996-04-01), Komuro

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