Small-Scale IP Telephony Server: UNIVERGE iExpress5800/Lite

摘要

As IP networks have been rapidly expanding in recent years, the move toward VoIP (Voice over IP)/IP telephony services has been progressing at a very fast pace. This paper describes the UNIVERGE iExpress5800/Lite, a SIP (Session Initiation Protocol) and Presence server for small- and medium-sized businesses and SOHOs. This server features a call control function based on SIP protocol IETF RFC3261 as well as a presence function.