SIPSignalingGroup-1 (sipsg 1) Prompt Commands |
SIP (Session Initiation Protocol) is a signaling protocol that is used to establish a session on an IP network. SIP is a request-response protocol that closely resembles Hypertext Transfer Protocol (HTTP), which forms the basis of the World Wide Web. It re-uses many of the constructs and concepts of Internet protocols such as HTTP and Simple Mail Transfer Protocol (SMTP).
The purpose of SIP is only to establish/change/terminate sessions. SIP is not concerned with the content or details of the session. It was designed to solve only a few problems and to work with many existing and future IP protocols.
SIP is Transport layer-independent, which means it can be used with any transport protocol: UDP, TCP, ATM, etc. It is text-based, so requires no encoding/decoding like H.323. And SIP supports user mobility, using proxies and redirecting requests to your current location.
You may create SIP Signaling Groups (up to 4 for a Tenor Gateway, and up to 8 for a CMS) with the following CLI command:
new sipsg [index]
where the index can be an alphanumeric string up to 31 characters long.
In Configuration Manager, right-click the SIP Signaling Group in the menu tree, select New, and enter an index.
Each SIP Signaling Group may contain up to 24 User Agents.
In order to use SIP, you must first select it with the following OutgoingIPRouting command from the Gateway prompt:
config-GateWay-1#set outgoingiprouting oroipr 1
While the SIP Registrar and SIP Proxy may be two different entities, it is possible that the Proxy you are using may provide both Registrar and Proxy services at the same IP address. If you want to make an IP call using a SIP Proxy, or if you want REGISTER messages to be sent out, you must configure your Proxy IP address (or DNS name) at PrimarySIPServer.