Welltech FXS SIP Gateway V.2.9 - Manual (Page 34)

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FXS Gateway Overview
3.5.2 Two sets attached to IP Sharing Device(Router)
1. Assign an IP address to each set using DHCP or fixed address.
2. Enable the IP Sharing function for each set using following command.
Fixed IP Address – usr/config$ ifaddr –ipsharing 1 210.11.22.33
3. Configure separate SIP port and RTP port for each set to prevent
from port conflict. For example, if set A uses the default settings (SIP port: 5060,
RTP port:
16384), you must change set B’s setting to SIP port equal to 5061 and RTP port
equal to 26384 for instance.
Change SIP port – usr/config$sip –port 5061
Change RTP port– usr/config$sip –rtp 26384
4. Use the Port Forwarding or Port Redirection function provided by IP
Sharing device (Router). See following for example.
>Advanced setting > NAT setting > Port Redirection
Active Configuration
Items Service name Protocol Actual Port Virtual IP Virtual Port Enable
1 1 UDP 5060 192.168.1.10 5060 V
2 2 UDP 16384 192.168.1.10 16384 V
3 3 UDP 16394 192.168.1.10 16394 V
4 4 UDP 5061 192.168.1.11 5061 V
5 5 UDP 26384 192.168.1.11 26384 V
6 6 UDP 26394 192.168.1.11 26394 V
7 --- 0 0 X