Audio gateway device

Details Audio gateway device Audio gateway device

2007-11-13

2007-11-13

Ni, Suhan (Department: 2615)

Multiplex communications

Pathfinding or routing

Combined circuit switching and packet switching

C370S356000, C370S401000, C379S228000

Reexamination Certificate

active

10226267

ABSTRACT:
A gateway device includes PDTN line terminating portion1, audio data processing portion2, header processing portion3, packet network line terminating portion4and gateway control processor5. Header processing portion3receives an RTP packet with session number from audio data processing portion2and outputs an IP packet attached with UDP/IP header information to packet network line terminating portion4. Header processing portion3receives an IP packet from packet network line terminating portion4and checks UDP/IP header thereof When the IP packet is an audio packet, header processing portion3deletes the UDP/IP header, attaches a session number thereto and outputs an RTP packet with session number to audio data processing portion2and, when the IP packet is an audio packet, header processing portion3transfers it directly to audio data processing portion2to send the audio data to the PSTN through PSTN line terminating portion1.

REFERENCES:
patent: 5805587 (1998-09-01), Norris et al.
patent: 6584098 (2003-06-01), Dutnall
patent: 7110748 (2006-09-01), Murphy et al.
patent: 1269940 (2000-10-01), None
patent: 7-170288 (1995-07-01), None
patent: 2000-286897 (2000-10-01), None
patent: WO99/12329 (1999-03-01), None

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