Outbound Proxy List - Snom 4S NAT Filter Admin Manual

4.6 Outbound Proxy List

In addition to the previously mentioned outbound proxy you may
specify a number of dedicated outbound proxies. This feature is typically
being used in the following scenarios:
•
Integration of PSTN gateway. If you set the outbound proxy of the
PSTN gateway to the filter, it can easily redirect all requests to the
proxy. However, when the proxy wants to route a call back through
the filter, it must know that the request must be routed to the PSTN
gateway. If you set up a DNS name for the PSTN gateway and set
the destination to the filter, you can elegantly redirect all outgoing
calls to the PSTN gateway trough the filter first. BTW the filter can
then take care about such problems like UDP fragmentation and
multiple 2xx responses.
• Replace PSTN gateway with other gateways, for example ITSP
service or IP gateways.
• Multiple-Domain hosting: If you are using several proxies for different
domains, the filter can redirect the requests automatically to the
right proxy. This approach is limited to maximum ten domains per
filter; for more domains you need to use the web server integration
mentioned above.
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