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5 November 1999 Automation of call setup in IP telephony for tests and measurements
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In IP telephony, a call is usually established in multiple stages. In the first stage, an ingress or call-originating IP-PSTN gateway (GW) is accessed. This is followed by a PIN based caller authentication. Finally, a destination telephone number is entered. If the GWs have enough digital signal processing channels and processing capacity, and the backbone (transport) network can support one T1 CAS port's worth of calls, we should be able to simultaneously start 24 voice connection attempts. The call originating GW should be able to process all the 24 connection requests. However, it appears that most of the currently available IP-PSTN GWs can not handle all 24 simultaneous connection requests. Therefore it is necessary to develop a method to determine the number of calls that can be started simultaneously. It is also required to determine the amount of inter call-burst time gap (in millisec. or sec.) so that all 24 calls will be processed using the existing hardware and software configuration and capacity of the GW. In this paper we develop techniques to perform both of the above functions. These are implemented using Hammer visual basic language for testing some commercially available IP telephony GWs.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Bhumip Khasnabish "Automation of call setup in IP telephony for tests and measurements", Proc. SPIE 3842, Internet II: Quality of Service and Future Directions, (5 November 1999);


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