Door phone system

Details Door phone system Door phone system

2005-10-12

2009-12-22

Ramakrishnaiah, Melur (Department: 2614)

Television

Two-way video and voice communication

C348S014020, C348S153000, C455S066100

Reexamination Certificate

active

07636103

ABSTRACT:
An indoor master unit200divides image information stored in an image information storage unit203and taken by a camera unit101of a front door slave unit100into a length capable of being transmitted in one TDMA time slot, and writes a transmission sequence number, respectively, and transmits the same information several times. The plurality of wireless monitor slave units300ato300nat the receiver side delete an error packet and repetitively received image information, and perform image display.

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