Max Forwards; Call Log File; Tel Domain; Enum Suffix - Snom 4S Administrator's Manual

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Max Forwards

Messages in SIP may hop over a number of proxies, and
sometimes the path contains loops. Sometimes the loops are endless,
and in these situations the criterion for rejecting a message is to look at
the number of hops the request has done so far.
This setting controls how many hops a request can make
before it is rejected as an endless loop. 70 is the default value; in many
environments you can significantly lower this value.

Call Log File

This field is used in conjunction with the billing support of the
proxy. It is eplained in a seperate chapter on billing (see below).

Tel Domain

When the proxy is asked to route a call with a tel URL as
destination, it needs a domain context to do this. The name of the domain
which is úsed for this is stored in this setting. This name must be the
primary name of the domain, not an alias name.

ENUM Suffix

When converting a tel URL into a URL, the proxy needs a suffix
for the translated telephone number. By default, this is "e164.apra".
However, in many environments you want to choose a different name.
This can be set up with this setting.

NAT Gateway

When the proxy is operated in a private network (behind NAT),
the SIP messages must be send via an application layer gateway (ALG;
the proxy does not support features like UPnP or STUN).
When you run a setup like this, you must be aware that the proxy
might not be visible from the outside world. The functionality of the proxy
depends on the feature set of the ALG. Please refer to the documentation
of your ALG.
74 • Routing
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