Before You Begin - ZyXEL Communications MAX-206M2 User Manual

Chapter 11 The Service Configuration Screens
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.
SIP Number
The SIP number is the part of the SIP URI that comes before the "@" symbol. A SIP number
can use letters like in an e-mail address (johndoe@your-ITSP.com for example) or numbers
like a telephone number (1122334455@VoIP-provider.com for example).
SIP Service Domain
The SIP service domain of the VoIP service provider (the company that lets you make phone
calls over the Internet) is the domain name in a SIP URI. For example, if the SIP address is
1122334455@VoIP-provider.com, then "VoIP-provider.com" is the SIP service domain.
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 1889 for details on RTP.
Use NAT
If you know the NAT router's public IP address and SIP port number, you can use the Use
NAT feature to manually configure the WiMAX Modem to use a them in the SIP messages.
This eliminates the need for STUN or a SIP ALG. You must also configure the NAT router to
forward traffic with this port number to the WiMAX Modem.

11.1.3 Before you Begin

• Ensure that you have all of your voice account information on hand. If not, contact your
voice account service provider to find out which settings in this chapter you should
configure in order to use your telephone with the WiMAX Modem.
• Connect your WiMAX Modem to the Internet, as described in the Quick Start Guide. If
you have not already done so, then you will not be able to test your VoIP settings.
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User's Guide