Netopia 430 S/T, Справочное руководство

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2-26 Netopia ISDN Router Reference Guide
Answering calls
Netopia can answer calls as well as initiate them. To answer calls,
Netopia uses an answer profile, just as it uses a connection profile
to make calls. Netopia’s answer profile controls how incoming calls
are set up, authenticated, filtered, and more.
How the answer profile works
The answer profile works like a guard booth at the gate to your
network: it only scrutinizes incoming calls. Like the guard booth, the
answer profile allows calls based on a set of criteria that you define.
The main criterion used to check calls is whether they match one of
the connection profiles already defined. If PAP or CHAP
authentication is being used, the answer profile checks that the
incoming call’s name and password/secret match the receive name
and password/secret of a connection profile. If PAP or CHAP are not
being used, an incoming call is matched to a connection profile
using the remote network’s IP address (that is, the caller is defined
as the destination of a par ticular connection profile).
You could instruct the answer profile to allow calls in even if they fail
to match a connection profile. Continuing the guard booth analogy,
this would be like removing the guards or having them wave all calls
in, regardless of their source.
If an incoming call is matched to an existing connection profile, the
call is accepted. All of that connection profile’s parameters, except
for authentication, are adopted for the call.
If an incoming call is not required to match a connection profile, and
fails to do so, it is accepted as a standard IP connection. Accepted,
unmatched calls adopt the call parameter values set in the answer
profile (see below).