*Please note that due to limited supply, TT&S materials must be returned within 60 days or borrowers will be subject to a $100 replacement fee.
**Users must register with this site and be a part of a member company to request self study courses. Certificates of completion will not be mailed out by TT&S but can be printed by employees registered on this site by accessing their training records in the member area.
Understand what SIP is, how it works, demystify jargon like proxy server and location server, understand how SIP fits in with softswitches and call managers, and trace the establishment of an IP phone call step by step. Covers connecting to carriers using traditional DS0 PBX trunks and PRIs, how Megaco fits in to the story, plus IP interconnect, co-existence with legacy systems, integrated messaging and more.REGISTER