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Multi-Media Alarm Stations
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Network Address Translation for Alarm Stations
In a nutshell
A connection to one or many Multi-Media alarm stations, using one IP address, can be made by
using network address translation (NAT) and port address translation (PAT)—a one-to-many
address translation. This is useful to connect to alarm stations through:
• A WAN
• The Internet
• To another segment of the same LAN.
Fig. 11–3. Receiving Alarms from a Multi-Media Unit, over a WAN or the Internet.
IP Addresses
The key is to configure a router to translate and map the Callbacks source IP port. The Network
Administrator of the destination’s LAN can supply a Multi SA with the “Outside” IP address of the
internet router.
IP Port
Callbacks to alarm stations on a remote LAN are identified by the value of the Callback Source IP
Port box, in the Add Alarm Station /Update Alarm Station dialog boxes of Admin software, shown
in figure
11–4. Each alarm station on a remote LAN needs to have a different Callback value.
Mapping IP port in network’s router
For each Multi-Media alarm station, one port mapping is needed when translating a network
address.