Multiplex communications – Data flow congestion prevention or control – Control of data admission to the network
Reexamination Certificate
1999-12-10
2004-09-21
Chin, Wellington (Department: 2664)
Multiplex communications
Data flow congestion prevention or control
Control of data admission to the network
C370S468000, C379S009000
Reexamination Certificate
active
06795395
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to the field of IP telephony. More particularly, the invention relates to an apparatus and method for automating call setup in IP telephony.
BACKGROUND OF THE INVENTION
Packet networks, such as the Internet, are increasingly being used in conjunction with traditional circuit-switched networks to process telephone calls. This use of packet networks to process telephone calls is more commonly known as IP telephony.
In IP telephony, a call is usually established in multiple stages. In the first stage, an ingress or call-originating Internet Protocol—public switched telephone network (IP-PSTN) gateway is accessed. If the IP-PSTN gateway has enough digital signal processing (DSP) channels and processing capacity, and the backbone network can support, for example, one T1-Channel Associated Signaling (T1-CAS) port's worth of calls, 24 voice connection attempts should be able to be simultaneously started.
It appears, however, that most of the currently available IP-PSTN gateways can not handle all 24 simultaneous connection requests. Accordingly, there is presently a need for a system or process for effectively automating call setup in IP telephony.
SUMMARY OF THE INVENTION
A method consistent with the present invention provides for automatically establishing a set of calls in a network. A first device determines a maximum number of simultaneous calls that can be processed by a second device. The first device then determines a time interval necessary to allow calls to be established in a set of channels associated with the second device. Using the maximum number of simultaneous calls and the time interval previously determined, the set of calls are established.
An apparatus consistent with the present invention automatically establishes a set of calls. The apparatus provides means for determining a maximum number of simultaneous calls that can be processed by a device, means for determining a time interval necessary to allow calls to be established in a set of channels associated with the device, and means for establishing the set of calls using the maximum number of simultaneous calls and the time interval.
Another apparatus consistent with the present invention automatically establishes a set of calls. The apparatus includes a memory having program instructions and a processor responsive to the program instructions. The processor determines a maximum number of simultaneous calls that can be processed by a device, determines a time interval necessary to allow calls to be established in a set of channels associated with the device, and establishes the set of calls using the maximum number of simultaneous calls and the time interval.
REFERENCES:
patent: 6064653 (2000-05-01), Farris
patent: 6330236 (2001-12-01), Ofek et al.
patent: 6411679 (2002-06-01), Khasnabish
patent: 6529499 (2003-03-01), Doshi et al.
patent: 2002/0101866 (2002-08-01), Miloslavsky et al.
Chin Wellington
Foley Hoag & Elliot LLP
Jain Raj
Suchtya, Esq. Leonard C.
Verizon Laboratories Inc.
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