Telephone network communication device and network switching method

Telephone network communication device and network switching method

A communication device electronically connects with a phone and includes a control unit, a relay, a public switched telephone network (PSTN) interface, a voice over Internet Protocol (VoIP) network interface, and a ring signal detector. The relay is electronically connected with the control unit. Th...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: XIONG ZHENHUA, NIE YOUZHAN
Format: Patent
Sprache:chi ; eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TELEPHONIC COMMUNICATION
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Beschreibung
Zusammenfassung:A communication device electronically connects with a phone and includes a control unit, a relay, a public switched telephone network (PSTN) interface, a voice over Internet Protocol (VoIP) network interface, and a ring signal detector. The relay is electronically connected with the control unit. The PSTN interface and the VoIP interface are electronically connected with the relay. The ring signal detector is electronically connected with the control unit and the PSTN interface. The control unit controls the relay to connect the phone with the PSTN interface when the ring signal detector detects a PSTN ring signal. In one embodiment, the control unit controls the relay to connect the phone with the VoIP interface.