Method for performing gate coordination on a per-call basis

Details Method for performing gate coordination on a per-call basis Method for performing gate coordination on a per-call basis

2007-07-17

2007-07-17

Pham, Chi (Department: 2616)

Multiplex communications

Pathfinding or routing

Combined circuit switching and packet switching

C370S401000, C370S230000, C370S389000

Reexamination Certificate

active

10852775

ABSTRACT:
Gates a call between a calling party and a called party are coordinated. A timer associated with a first opened at an originating network edge device is initiated. A first gate open message is sent from the originating network edge device to the terminating network edge device. The first gate at the originating network edge device is released if the timer expires before at least one from the group of: (1) an acknowledgment based on the sent first gate open message is received from the terminating network edge device, and (2) a second gate open message is received at the originating network edge device from the terminating network edge device after the terminating network edge device has opened a second gate associated with the called party.

REFERENCES:
patent: 4565903 (1986-01-01), Riley
patent: 6563835 (2003-05-01), Chen
patent: 6757290 (2004-06-01), Kalmanek et al.
Schoen et al. “Convergence between public switching and the Internet”. IEEE. Jan. 1998. pp. 50-65.
“ISDN user-network interface layer 3 specification for basic call control”. ITU-T Q.931. May 1998. pp. 124, 177 and 178.

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