EchoLife HG552a Home Gateway
User Guide
Voice Services
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
6-1
6
Voice Services
6.1 In
r
The HG552a enables voice service interworking between the Internet and the Public
Switched Telephone Network (PSTN).
e Configuration
6.2.1 N
Figure 6-1
services.
troduction
The HG552a supports voice services based on the Session Initiation Protocol (SIP).
The SIP is an application layer protocol used to create, modify, or end multimedia
sessions. Based on text coding, the SIP references the Hyper Text Transport Protocol
(HTTP) and the Simple Mail Transfer Protocol (SMTP), and can cooperate with othe
protocols, such as the Real-time Transport Protocol (RTP), the Real-time Transport
Control Protocol (RTCP), the Session Description Protocol (SDP), and the Domain
Name Server (DNS) protocol to implement voice services and the facsimile service.
6.2 Voice Servic
etworking
shows the network model of voice