Pulse dialing system for VoIP modem

Details Pulse dialing system for VoIP modem Pulse dialing system for VoIP modem

2005-07-05

2005-07-05

Mei, Xu (Department: 2644)

Telephonic communications

Supervisory or control line signaling

Substation originated

C379S362000, C370S352000, C455S554100, C455S554200

Reexamination Certificate

active

06914978

ABSTRACT:
A pulse dialing system for a VoIP modem includes a subscriber line interface circuit (SLIC) for interfacing analog telephone signals to digital signals, a relay for selectively connecting a telephone set with a public switched telephone network (PSTN) or with the SLIC, and a control means, coupled to the SLIC and to the relay, for receiving a digit of a dialed telephone number and for controlling the relay to connect the telephone set with the PSTN and with the SLIC alternatively for a number of cycle(s) equal to the digit of the dialed telephone number so as to generate pulse dialing signals to the PSTN.

REFERENCES:
patent: 5877872 (1999-03-01), Nomura et al.
patent: 6614786 (2003-09-01), Byers
patent: 2004/0052242 (2004-03-01), Laturell

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