Switching control apparatus for a communication terminal having

Details Switching control apparatus for a communication terminal having Switching control apparatus for a communication terminal having

1989-04-10

1990-07-03

Ng, Jin F.

Telephonic communications

Telephone line or system combined with diverse electrical...

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

379100, 379102, 379104, 379 67, 379 74, 379 80, H04M 1100, H04M 164

Patent

active

049397729

ABSTRACT:
A terminal switching control apparatus, used for a combination of a voice terminal device and a non-voice terminal device, comprises a call signal recognition detector to detect an incoming signal and distinguish the detected signal between an voice signal and an non-voice terminal call signal, a device for transmitting a response message to urge the calling party to respond if no incoming voice signal is detected, an action request device for urging the called party to respond by the voice terminal device when an incoming voice signal is recognized after transmitting the response message, a control device for switching the line connection to the non-voice terminal device if neither the voice signal nor the non-voice signal is detected by the call recognition device, and a set of mode selector switches for selecting a presence mode and an absence mode according to the presence/absence status of the called party. The presence/absence mode can also be controlled automatically to conform to the presence/absence status of the called party.

REFERENCES:
patent: 3541261 (1968-11-01), Okleshen et al.
patent: 3723656 (1973-03-01), Curtis et al.
patent: 3873772 (1975-03-01), Dumler
patent: 4201896 (1980-05-01), Bower et al.
patent: 4340783 (1982-07-01), Sugiyama et al.
patent: 4821312 (1989-04-01), Horton et al.

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