| Publisher | SIP Center | ||
|---|---|---|---|
| Format | HTML | Date added | 21 Dec 2004 |
| Topics | VoIP - IP Telephony, File and Network Servers, Industry Standard Protocols | ||
| Downloads | 4 | ||
In recent years there has been a lot of innovative work done to define clarifications, bug fixes, tweaks, and extensions to SIP. Notable examples include the IETF clarifications of procedures for transferring calls, and new requests for comment (RFCs) and drafts to support the administration and attendant features common to PBXs and call centers. Recognized problems for SIP, namely operation through firewalls and Network Address Translation (NAT), have been address via RFCs and drafts. In addition, a body of literature is now available to describe how to use SIP, the Session Description Protocol (SDP), and other IETF standards to provide every imaginable voice service over an IP network.
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