Peter, Sorry for not replying sooner, I just noticed from archiving my EMC-PSTC & TREG emails that no one had replied to you.
In brief the ETSI Project TIPHON (www.etsi.org/tiphon/) has been working since April 1997 to establish a common set of infrastructure requirements for VoIP networks, unfortunately there is no single standard that covers all aspects. However, the architecture aspects have metamorphasised over the last 8-9 months and TIPHON is now concerned with Voice Over Networks (VON)! [i.e. VoPSTN, VoISDN, VoIP and VoTETRA) For many observers TIPHON has been viewed as a Voice over Internet Protocol (VoIP) project. This is not wholly true. TIPHON has historically had two functions: 1. Standardisation of VoIP 2. Standardisation of VoIP interconnection and interworking with existing SCNs (Switched Cct. Networks) In the development of VoIP, two bodies have been developing protocols: 1. IETF, developing SIP, SIGTRAN, MPLS, IPTel, etc. 2. ITU, developing H.323 TIPHON from the outset based their work on H.323 as the common denominator, however, they have now successfully written standards that permit interworking of both H.323 and SIP across TIPHON compliant networks. <Extract from The tics Newsletter Vol.4 Iss.1 - (c)2000 European Technology Services> >> ETSI TIPHON Architecture Supports H.323/SIP Interoperability At the March 2000 meeting of ETSIs Project TIPHON, members adopted an architecture for Telephony over Internet Protocol (IP) that is independent of specific call signalling protocols. The architecture supports a range of telephony related services and capabilities including the ones currently provided over Switched Circuit Network (SCN) across multiple administrative domains. IP telephony systems will be based both on the H.323 series of standards from the International Telecommunications Union (ITU) and the Session Initiation Protocol (SIP) from the Internet Engineering Task Force (IETF). This protocol independence is a major breakthrough in a telecommunications industry characterized by increasing complexity and heterogeneity. ETSI Project (EP) TIPHON brings a unique perspective to IP telephony standardization efforts: a focus on scalability, reliability, and performance requirements for world-wide deployment by major national and international carriers. TIPHON also derives its specifications by considering the requirements of IP telephony services, rather than particular technologies. In addressing H.323 and SIP, TIPHON will consider service requirements and scenarios, required functionality of interworking systems, and profiles of the protocols. TIPHON will also work on a variety of end-to-end aspects of IP Telephony in a multi-domain environment, including security and quality of service. ETSI Project TIPHONs H.323/SIP activities will include close cooperation with other industry groups, including the International Multimedia Teleconferencing Consortium, as well as coordinated contributions to the ITU and IETF standardization processes. In an environment where individual protocols are developed in separate bodies, multi-protocol interoperability is a market imperative, making ETSI Project TIPHON´s work a focal point for the IP Telephony industry. << Although ETS can provide technical assistance in this area, I recommend you start by browsing the TIPHON public area of the ETSI web site for a more in depth (free) analysis. Best regards, Edward Edward Fitzgerald Director Direct Tel. : +44 1202 20 09 22 Mobile Tel. : +44 7768 53 31 00 European Technology Services (EMEA) Specialist Global Compliance and Regulatory Consultancy Regional Offices in Australia, Canada and the UK. GLOBAL INtelLIGENCE Site < http://www.ets-tele.com/tics > pssst ... spread the word -----Original Message----- From: Peter Merguerian [mailto:[email protected]] Sent: Thursday, June 01, 2000 5:25 PM To: [email protected] Subject: Just Curious; VOIP Network Dear All, Does anyone know how the VoIP Based Access Network will be constructed? Is there a standard I could refer to? Peter Merguerian Managing Director Product Testing Division I.T.L. (Product Testing) Ltd. Hacharoshet 26, POB 211 Or Yehuda 60251, Israel Tel: 972-3-5339022 Fax: 972-3-5339019 e-mail: [email protected] website: http://www.itl.co.il
