Pattern 3

 Some phones and PBX/SIP Server are in the same LAN and some Phones are in another LAN over the Internet.

When a SIP UA is located behind NAT, the following information is required:


  •        Port Forwarding information on the router
               SIP exchanger - Local Port [UDP]
               Default Value: 5060
               RTP Exchanger - From Minimum Port to Maximum Port [UDP]
               Default value: 10000-10999

  •        Interface address field on PBX SIP Server
               This field is located on the PBX SIP Server > Config > System > Network
               Interface Address # = Your ROUTER’S global IP Address
    •