초록 ▼

A cordless telephone system has a master unit connected to a telephone line and having a radio transceiver and a plurality of sub-units having radio transceivers and transmittable to and receivable from the telephone line through the master unit. Speech from the telephone line can be transferred bet

A cordless telephone system has a master unit connected to a telephone line and having a radio transceiver and a plurality of sub-units having radio transceivers and transmittable to and receivable from the telephone line through the master unit. Speech from the telephone line can be transferred between any sub-units, and speech by press-to-talk system is enabled between any sub-units through the master unit. A multi-purpose controller is provided in the master unit to enable control of an equipment by dialing from a sub-unit. For example, a tape recorder is operated, an automatic response/record function is operated, an interphone function is operated, a call from the telephone line can be directed to any sub-unit by a signal from the sub-unit, and all sub-units can be simultaneously or sequentially called from the telephone line. In the speech between sub-units by the press-to-talk system, signals representing start and end of the speech are generated by the sub-unit to control holding and release of an external telephone line of a master unit repeater so that speech with the external line is restored immediately after the end of the speech between the sub-units. When one sub-unit is in speech, other sub-units cannot hear the speech.

대표청구항 ▼

A cordless telephone system comprising: a master unit connected to a telephone line and having a radio transceiver; at least one sub-unit having a radio transceiver and which is capable of transmitting and receiving speech to and from the telephone line through the master unit; and control means res

A cordless telephone system comprising: a master unit connected to a telephone line and having a radio transceiver; at least one sub-unit having a radio transceiver and which is capable of transmitting and receiving speech to and from the telephone line through the master unit; and control means responsive to a control signal from said sub-unit, said control means including at least one of: transfer control means for permitting transfer of speech on said telephone line from one sub-unit to another sub-unit, speech control means for permitting speech between sub-units through the master unit, and equipment control means for controlling equipment other than the telephone line by said sub-unit.