VTOA/VolP/N-ISDN Telephony Gateway |
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Authors: | Antonio Manuel Grilo Pedro Miguel Carvalho Ludmila Maria Medeiros Mario Serafim Nunes |
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Affiliation: | 1. IST, rua Rovisco Pais, 1000, Lisboa, Portugal 2. INESC, Rua Alves Redol, n9, 1000, Lisbon, Portugal
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Abstract: | This article presents the architecture and implementation of a telephony gateway for interworking between N- ISDN, ATM and IP telephony. In this way, interworking is achieved both within private networks and with the PSTN, address translation being performed according to both the vtoa (atm interface) and H .323 (ip interface) specifications. The gateway implementation is based on a PC, presenting a cost- effective alternative to the equipment currently available on the market. Moreover, its highly modular software architecture allows new telephony interfaces to be easily added. |
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