Invention Grant
US08688149B2 Cordless telephone active-call enabled intercom 有权
无绳电话有效呼叫启用对讲机

Cordless telephone active-call enabled intercom
Abstract:
A method of using an intercom on a cordless telephone during an active call. The active call is put on hold while the intercom is in use. Once the call is re-activated, the intercom is shut off. This system may be designed for a cordless telephone with one handset or a plurality of handsets.
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