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GSM Gateway User Manual
www.allo.com Version 2.0 26
Make sure that the current date and time are configured currently under
System
>
Date/Time
Configuration.
4.2.3 SIP Global Settings
Navigate through
Setup
>
Advanced
>
SIP Global Settings
SIP Global settings apply to all VoIP traffic.
Port Settings
Figure 111: Port Settings
Port Settings
SIP Bind Port
Choose a port on which to listen for SIP UDP traffic. Default:
5060
RTP Port Range
Range of port numbers to be used for RTP traffic.
Default:
16001- 17000
Make sure you configure this dynamic range of ports on your
NAT Router. When the GSM Gateway is behind a NAT and the
NAT is configured to do port forwarding with above
mentioned port range for UDP ports.