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Chapter 13 Settings
V660 User’s Guide
108
Figure 82 Settings: SIP Phone Advanced Settings
The following table describes the labels in this screen.
13.2.2.3 STUN
Some SIP service providers need you to setup STUN on your V660. STUN (Simple Traversal
of UDP (User Datagram Protocol) through NATs (Network Address Translators) can solve
some problems caused by NAT. Follow the instructions supplied by your VoIP service
provider.
Figure 83 Settings: SIP Phone STUN Settings
Table 15 Settings: SIP Phone Advanced Settings
LABEL DESCRIPTION
DTMF Payload Enter the payload number that is used for Dual-Tone Multi-Frequency
information (according to RFC2833).
Call prefix The number specified in this field will be added in front of calling number.
Some service providers require a prefix number to access certain services.
Server Certain server types require the phone to perform non-standard
processes. Enter the type of SIP server your service provider uses.
SIP Listen port Enter the listening port number of the SIP server.
RTP port Enter the SIP server’s Real-time Transport Protocol port number here.