Altigen AltiContact Manager Version 5.0A, Administration Manual

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Configuration Guidelines for NAT
9-14 AltiContact Manager Administration Manual
as GKIP — “Gatekeeper’s IP address.” In gateway mode, you should
specify which gateway you want this IP phone to connect to. Thus, you will
need to give the phone the IP address of the gateway, referred to as
GWIP
— “Gateway’s IP address.”
Notes
• The current version of the Polycom IP phone can only support the
gatekeeper mode .
• Netmeeting integrated with AltiView works with AltiWare in gateway
mode , in this case, AltiView’s login server IP address is GWIP.
NAT
Due to H.323 protocol, which puts the IP address information in the TCP/
IP payload, the
NAT (Network Address Translation) router requires some
H.323 protocol implementation to correctly handle the H.323 traffic and
translate the private IP address into a public IP address. But unfortunately,
not all the NAT routers have this kind of H.323 implementation. In case the
NAT router does not support H.323,
if AltiWare is behind the NAT , refer to
page 9-29 for details on AltiWare’s NAT support feature; if the AltiGen IP
phone is behind the NAT, refer to for AltiGen IP phone’s NAT support
feature.
Private IP address
Only the private IP address is used in private network - the public router
will not route the packet that has a private IP address as its destination. (All
IP addresses beginning with 192.168.x.x are referred to as private IP
addresses.)