Configuring Your System for ITSP Interoperability
Network Address Translation (NAT) and Voice over IP (VoIP)
3
STEP 3 Scroll down to the NAT Support Parameters section, and then enter the following
settings to support static mapping to your public IP address:
Handle VIA received, Insert VIA received, Substitute VIA Addr: yes
Handle VIA rport, Insert VIA rport, Send Resp To Src Port: yes
EXT IP: Enter the public IP address for your router.
Voice tab > SIP: NAT Support Parameters
STEP 4 Click Voice tab > Line , where N represents the line interface number.
STEP 5 Scroll down to the NAT Settings section.
NAT Mapping Enable: Choose YES.
NAT Keep Alive Enable: Choose YES (optional).
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