Circuit and method for operating a radio telephone upon loss of

Details Circuit and method for operating a radio telephone upon loss of Circuit and method for operating a radio telephone upon loss of

1991-12-26

1995-03-21

Kuntz, Curtis

Telephonic communications

Having light wave or ultrasonic link for speech or paging...

Including fiber optic link within telephone network

379 61, H04M 1100

Patent

active

054003881

ABSTRACT:
A circuit for preventing a radio telephone engaged in a call from being cut off when a power failure occurs, wherein the radio telephone is branched with a wire telephone by a telephone line. When the power is off while engaged in a call, the telephone line is held on by a state of a line voltage and a music on hold is generated. If power turns on again in a holding state, a power off cancel data is transmitted to a portable device. If a response data from the portable device is received, the holding state of the telephone line is canceled and the music on hold is stopped, and the call through the radio telephone is connected again. If the power is not on again or if the response data is not received, it is checked during a given time whether the wire telephone is hooked off or not. If the wire telephone is hooked off or if the given time has passed, the holding state of the telephone line is canceled and the music on hold is stopped. Therefore, the telephone call is continued even when a power failure occurs on an engaged state in the call.

REFERENCES:
patent: 4238644 (1980-12-01), Dijkmans et al.
patent: 4847899 (1989-07-01), Hikida
patent: 4876708 (1989-10-01), Saegosa et al.
patent: 5003587 (1991-03-01), Forbes

Affiliated with

Also associated with

Rating

Circuit and method for operating a radio telephone upon loss of does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circuit and method for operating a radio telephone upon loss of , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit and method for operating a radio telephone upon loss of will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1155623