Four-Channel GSM VoIP Gateway
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3.4.2 Advanced Settings
Click on “
Advance Settings
” tab on the top right corner of the Call Setting page to display
all the parameters for programming, as shown below. These parameters allow more
advanced control over the SIP signaling and media preference.
A
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Local Signaling Port (SIP Local port)
The default SIP port is 5060. Change this as required.
B
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SIP 183
Check the box of SIP 183 if the SIP server supports this feature.
C) NAT Keep-alive
The NAT Keep-alive feature sends a null packet to the SIP Proxy periodically in order to
keep the NAT open on your firewall for incoming data traffic.
