Figure 15-9 SIP Redirect Server
----End
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 V
oIP 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 display the basic steps in the setup and tear down of a SIP call. A calls
B.
LTE CPE B2368
User Guide
15 VoIP
Issue 03 (2019-01-31) Copyright © Huawei Technologies Co., Ltd. 128
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