Huawei B2268H User Manual page 116

LTE TDD B2268H
User Guide
Figure 13-8 SIP Redirect Server
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SIP Register Server
A SIP register server maintains a database of SIP identity-to-IP address (or domain name)
mapping. The register server checks your user name and password when you register.
RTP
When you make a VoIP call using SIP, the RTP (Real time Transport Protocol) is used to handle
voice data transfer. See RFC 3550 for details on RTP.
Pulse Code Modulation
Pulse Code Modulation (PCM) measures analog signal amplitudes at regular time intervals and
converts them into bits.
SIP Call Progression
The following figures displays the basic steps in the setup and tear down of a SIP call. A calls B.
Issue 01 (2014-01-15) Copyright © Huawei Technologies Co., Ltd.
13 VoIP
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