The Challenges in Building a Carrier-Scale IP Network
BT Technology Journal
VoIP Applied — Lab Bench to Multimedia Service
BT Technology Journal
VoIP Gateways and the Megaco Architecture
BT Technology Journal
H.323 — A Key to the Multimedia Future
BT Technology Journal
SIP and Conversational Internet Applications
BT Technology Journal
SIP and H.323 — Interworking VoIP Networks
BT Technology Journal
Quality VoIP — An Engineering Challenge
BT Technology Journal
BT Technology Journal
BT Technology Journal
Corporate multimedia communications
BT Technology Journal
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Recent developments in IP telephony equipment have made it possible to provide a fully converged communications solution. This paper specifically concentrates on the customer-premises-based IP telephony solutions for the business market and in particular it looks at the next generation in IP-based telephones and private branch exchanges (PBXs). This also leads to the importance both of the network infrastructure, including local and wide-area networks, and of providing end-to-end quality of service to support voice as a real-time service. Suppliers are striving to develop the systems that will exploit the new converged world while at the same time deliver the reliability and functionality that customers demand. It is currently very much an early adopter market for these IP telephony solutions and experience drawn from delivering trials to external customers as well as the internal pilot work is used to provide a practical snapshots of today's solutions.