VoIP gateway device and digital one-link tandem exchange method

Details VoIP gateway device and digital one-link tandem exchange method VoIP gateway device and digital one-link tandem exchange method

2006-05-02

2006-05-02

Qureshi, Afsar (Department: 2667)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S235000, C370S392000, C370S467000

Reexamination Certificate

active

07039059

ABSTRACT:
A VoIP (Voice over IP network) gateway device includes an identification pattern inserting section, identification pattern detecting section, pass through frame assembly section, and pass through frame processing section. The identification pattern inserting section inserts an identification pattern of a predetermined bit pattern in a receiving signal from an IP transit trunk, and sends out the signal to a digital exchange. The identification pattern detecting section detects an identification pattern from a receiving signal from the digital exchange. The pass through frame assembly section converts an RTP (Real-time Transport Protocol) packet obtained from the IP transit trunk into a digital voice signal in a pass through frame format having a bit rate of 64 kbps when the identification pattern detecting section detects an identification pattern. The pass through frame processing section converts a digital voice signal in the pass through frame format received from the digital exchange into an RTP packet when the identification pattern detecting section detects no identification pattern. A digital one-link tandem exchange method is also disclosed.

REFERENCES:
patent: 6275574 (2001-08-01), Oran
patent: 2002/0196790 (2002-12-01), Koistinen
patent: 10-336332 (1998-12-01), None

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