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System Administrator’s Guide
Document K14392V1 Rev A 37
07/07
Network Address Translation
In a nutshell
A connection to one or many Multi-Media units, using one IP address, can be made by using
network address translation (NAT) also called port address translation (PAT). This is useful to
connect to Multi-Media units through: a WAN, the Internet or to another segment of the same
LAN. The key is to configure a router to translate and map the Sessions source IP port.
IP Addresses
The Network Administrator of the destination’s LAN can supply a Multi SA with:
• the Inside IP address and Outside IP address of the internet router
• the LAN IP addresses that are assigned to each unit. See the example in table
3–4, below.
IP Port
For each Multi-Media unit on a remote LAN, set a different router Sessions value, under Source
Ports, in the Add Connection/Update Connection dialog box of Admin software. Figure
3–10,
shown further below, shows where to enter this value. The router uses the value to route
commands to the proper unit, on the remote LAN.
Fig. 3–8. NAT Configuration for Operating a Multi-Media Unit Over a WAN.