Sip - Huawei B2268H User Manual

LTE TDD B2268H
User Guide

13.6.2 SIP

The Session Initiation Protocol (SIP) is an application-layer control (signaling) protocol that
handles the setting up, altering and tearing down of voice and multimedia sessions over the
Internet.
SIP signaling is separate from the media for which it handles sessions. The media that is
exchanged during the session can use a different path from that of the signaling. SIP handles
telephone calls and can interface with traditional circuit-switched telephone networks.
SIP Identities
A SIP account uses an identity (sometimes referred to as a SIP address). A complete SIP identity
is called a SIP URI (Uniform Resource Identifier). A SIP account's URI identifies the SIP
account in a way similar to the way an e-mail address identifies an e-mail account. The format
of a SIP identity
SIP Number
The SIP number is the part of the SIP URI that comes before the "@" symbol. A SIP number can
use letters like in an e-mail address
telephone number
SIP Service Domain
The SIP service domain of the VoIP service provider is the domain name in a SIP URI. For
example, if the SIP address is 1122334455@VoIP-provider.com, then "VoIP-provider.com" is
the SIP service domain.
SIP Registration
Each LTE Device is an individual SIP User Agent (UA). To provide voice service, it has a
public IP address for SIP and RTP protocols to communicate with other servers.
A SIP user agent has to register with the SIP registrar and must provide information about the
users it represents, as well as its current IP address (for the routing of incoming SIP requests).
After successful registration, the SIP server knows that the users (identified by their dedicated
SIP URIs) are represented by the UA, and knows the IP address to which the SIP requests and
responses should be sent.
Registration is initiated by the User Agent Client (UAC) running in the VoIP gateway (the LTE
Device). The gateway must be configured with information letting it know where to send the
REGISTER message, as well as the relevant user and authorization data.
A SIP registration has a limited lifespan. The User Agent Client must renew its registration
within this lifespan. If it does not do so, the registration data will be deleted from the SIP
registrar's database and the connection broken.
The LTE Device attempts to register all enabled subscriber ports when it is switched on. When
you enable a subscriber port that was previously disabled, the LTE Device attempts to register
the port immediately.
Issue 01 (2014-01-15)
is SIP-Number@SIP-Service-Domain.
(johndoe@your-ITSP.com
(1122334455@VoIP-provider.com
Copyright © Huawei Technologies Co., Ltd.
for example) or numbers like a
for example).
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