NEC SL1100 Issue 6.0Networking Manual 10 - 3NAT Mode for SIP Phone (Version 4.0 or higher) NAT mode for SIP Phone which can not use SIP P2P mode and standard SIPvideo call feature uses P2P mode cannot establish in same system. When PRG 10-33-05 NAT mode for SIP phone is set to 1 - Enable, P2P modefor SIP Phone becomes always Off regardless PRG 10-26-03 setting. With Version 4.0 or higher the system time can be provided using NTP timeserver updates to standard SIP terminals. When connecting multiple SIP Phones via NAT, PRG 15-05-18 has to be set toadmit the registration of multiple SIP Phones which are using the same IPaddress. For example, if you had a STD SIP Terminal that had two linesregistering with the same IP Address, you would need to flag PRG 15-05-18 forboth Extension numbers. In the router/firewall that the SL1100 resides behind port forwarding is required.Port forwarding at the SIP Terminal end is not required as long as PRG 15-05-45 (Plug and Play) is enabled, which it is by default. The ports that must beforwarded to the SL1100 are as follows: UDP Port 5070 MUST be forwarded to the IP Address assigned in PRG10-12-09. UDP Ports 10020 ~ 10083 MUST be forwarded to the IPAddress assigned in PRG 84-26-01.S ECTION 2 P ROGRAMMING2.1 Card SetupProgramNumber Program Name Description/Comments Assigned Data 1 2 310-03-01ETU Setup – VoIPDBPkgTrunk Logical Port Number 0~200(READ ONLY)Default is 0X10-03-02ETU Setup – VoIPDB Trunk Type 0 = H.3231 = SIPDefault is 1X
