Title :
VTOA/VoIP/ISDN telephony gateway
Author :
Grilo, António Manuel ; Carvalho, Pedro Miguel ; Medeiros, Ludmjila Maria ; Nunes, Mário Serafim
Author_Institution :
INESC, Lisbon, Portugal
Abstract :
This paper presents the architecture and implementation of a telephony gateway for interworking between 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
Keywords :
ISDN; Internet telephony; asynchronous transfer mode; internetworking; protocols; software architecture; ATM interface; H.323; IP interface; IP telephony; ISDN; PC; PSTN; VTOA; VoIP; address translation; modular software architecture; private networks; protocols; telephony gateway; Costs; Decision support systems; ISDN; Internet telephony; Phase change materials; Protocols; Quality of service; Software architecture; Streaming media; Transform coding;
Conference_Titel :
ATM, 1999. ICATM '99. 1999 2nd International Conference on
Conference_Location :
Colmar
Print_ISBN :
0-7803-5428-1
DOI :
10.1109/ICATM.1999.786807
