User`s guide

Chapter 11 The Service Configuration Screens
User’s Guide
114
11.2.1 Advanced SIP Settings
This section describes the features of the Advanced SIP settings screen.
11.2.1.1 STUN
STUN (Simple Traversal of User Datagram Protocol (UDP) through Network Address
Translators) allows the WiMAX Modem to find the presence and types of NAT routers and/or
firewalls between it and the public Internet. STUN also allows the WiMAX Modem to find the
public IP address that NAT assigned, so the WiMAX Modem can embed it in the SIP data
stream. STUN does not work with symmetric NAT routers or firewalls. See RFC 3489 for
details on STUN.
The following figure shows how STUN works.
1 The WiMAX Modem (A) sends SIP packets to the STUN server (B).
2 The STUN server (B) finds the public IP address and port number that the NAT router
used on the WiMAX Modem’s SIP packets and sends them to the WiMAX Modem.
3 The WiMAX Modem uses the public IP address and port number in the SIP packets that
it sends to the SIP server (C).
REGISTER
Server
Address
Enter the IP address or domain name of the SIP register server, if your VoIP
service provider gave you one. Otherwise, enter the same address you entered in
the SIP Server Address field. You can use up to 95 printable ASCII characters.
REGISTER
Server Port
Enter the SIP register server’s listening port number, if your VoIP service provider
gave you one. Otherwise, enter the same port number you entered in the SIP
Server Port field.
SIP Service
Domain
Enter the SIP service domain name. In the full SIP URI, this is the part after the @
symbol. You can use up to 127 printable ASCII Extended set characters.
Send Caller ID Select this if you want to send identification when you make VoIP phone calls.
Clear this if you do not want to send identification.
Authentication
User Name Enter the user name for registering this SIP account, exactly as it was given to
you. You can use up to 95 printable ASCII characters.
Password Enter the user name for registering this SIP account, exactly as it was given to
you. You can use up to 95 printable ASCII Extended set characters.
Apply
Click to save your changes.
Reset
Click to restore your previously saved settings.
Advanced
Click this to edit the advanced settings for this SIP account. The Advanced SIP
Settings screen appears.
Table 44 VOICE > Service Configuration > SIP Setting (continued)
LABEL DESCRIPTION