Protocol for exchanging signaling signals in a cordless telephon

Details Protocol for exchanging signaling signals in a cordless telephon Protocol for exchanging signaling signals in a cordless telephon

1996-10-09

1999-08-03

Wolfe, Willis R.

Telecommunications

Transmitter and receiver at separate stations

Plural transmitters or receivers

455515, 455516, H04Q 714, H04B 712

Patent

active

059337796

ABSTRACT:
A channel is selected first, and immediately the received field is measured and digital Manchester code data are searched for. The digital signals are 100% Manchester code signals. After a predetermined first delay, the carrier level is tested and recorded in a memory. The smallest value among the various recorded values is selected; a fixed value is added thereto; and the value thus obtained is used as a threshold value for the level test. If the channel is free, another channel is selected. If the channel is occupied, one will wait for a second delay period, after which a test is performed to know whether data have been recognized. If nothing has been recognized, another channel is selected.

REFERENCES:
patent: 5101503 (1992-03-01), Furuya
patent: 5203012 (1993-04-01), Patsiokas et al.
patent: 5408684 (1995-04-01), Yunoki et al.
patent: 5551064 (1996-08-01), Nobbe et al.
patent: 5566366 (1996-10-01), Russo et al.
patent: 5655002 (1997-08-01), Proctor et al.
patent: 5805982 (1998-09-01), Hulsebosch

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