EchoLife HG556 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 HG556 enables voice service interworking between the Voice over Internet Protocol
(VoIP) and the Public Switched Telephone Network (PSTN).
e Configuration
6.2.1 N
Figure 6-1 shows the network model of voice services.
troduction
The HG556 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
