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#Voip sip definition registration

A unique SIP address that appears similar to an e-mail address and uses the format The user ID can be either a user name or an E.164 address.Identification of users in a SIP network works through A single session may involve several clients and servers.

SIP uses a request/response method to establish communications between various components in the network and to ultimately establish a call or session between two or more endpoints. Cisco CallManager can act as both a server or client (a back-to-back user agent). The UAS then returns a response on behalf of the user. A UAS is a server application that contacts the user when it receives a SIP request. User Agent (UA)-A combination of user agent client (UAC) and user agent server (UAS) that initiates and receives calls.Redirect or proxy servers often contain registrar servers.

#Voip sip definition registration

Registrar Server-The registrar server processes requests from user agent clients for registration of their current location.

Redirect Server-The redirect server provides the client with information about the next hop or hops that a message should take, and the client then contacts the next hop server or user agent server directly.

Proxy servers can provide functions such as authentication, authorization, network access control, routing, reliable request retransmission, and security. SIP Proxy Server-The proxy server works as an intermediate device that receives SIP requests from a client and then forwards the requests on the client's behalf.SIP Signaling/Trunk Interface Configuration ChecklistĪ SIP network uses the following components:.SIP Functions Supported in Cisco CallManager.This section covers the following topics: Understanding Session Initiation Protocol (SIP) describes SIP and the interaction between SIP and Cisco CallManager. SIP Signaling/Trunk Interface Configuration Checklist Redirecting Dial Number Identification Service (RDNIS) Supplementary Services Initiated by SIP EndpointĬalling Line and Name Identification PresentationĬalling Line and Name Identification RestrictionĬonnected Line and Name Identification PresentationĬonnected Line and Name Identification Restriction Supplementary Services Initiated by SCCP Endpoint SIP Functions Supported in Cisco CallManagerīasic Calls Between SIP Endpoints and Cisco CallManagerĭTMF Relay Calls Between SIP Endpoints and Cisco CallManagerįorwarding DTMF Digits from SIP Devices to Gateways or Interactive Voice Response (IVR) Systems Understanding Session Initiation Protocol (SIP)