ZyXEL Communications OLT2406, User Manual

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OLT2406 User’s Guide
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31
ONT VoIP
31.0.1 ONT VoIP Profile
Use the GPON > ONT VoIP Profile screens to configure VoIP settings for the subscriber Optical Network
Terminal (ONT) devices.
VoIP is the sending of voice signals over Internet Protocol. This allows you to make phone calls and send
faxes over the Internet at a fraction of the cost of using the traditional circuit-switched telephone
network. You can also use servers to run telephone service applications like PBX services and voice mail.
Internet Telephony Service Provider (ITSP) companies provide VoIP service.
Circuit-switched telephone networks require 64 kilobits per second (Kbps) in each direction to handle a
telephone call. VoIP can use advanced voice coding techniques with compression to reduce the
required bandwidth.
31.0.2 What You Can Do
• Use the VoIP Common Profile screen ( Section 31.1 on page 272 ) to configure general VoIP settings for
ONTs.
• Use the VoIP SIP Profile screen ( Section 31.2 on page 275 ) to configure ONT VoIP SIP settings.
• Use the VoIP Dial Plan Profile screen ( Section 31.3 on page 278 ) to create dial plan profiles.
31.0.3 What You Need to Know
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 is SIP-Number@SIP-
Service-Domain.