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Proceedings Paper

Automation of call setup in IP telephony for tests and measurements
Author(s): Bhumip Khasnabish
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Paper Abstract

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.

Paper Details

Date Published: 5 November 1999
PDF: 12 pages
Proc. SPIE 3842, Internet II: Quality of Service and Future Directions, (5 November 1999); doi: 10.1117/12.368320
Show Author Affiliations
Bhumip Khasnabish, GTE Labs. Inc. (United States)

Published in SPIE Proceedings Vol. 3842:
Internet II: Quality of Service and Future Directions
Raif O. Onvural; Seyhan Civanlar; James V. Luciani, Editor(s)

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