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Max
In some cases,T.38 endpoints will provide a T38FaxMxDatagram value (during T.38 setup) that is based on an incorrect
Datagram
interpretation of the T.38 recommendation, and result in failures because Asterisk does not believe it can send T.38 packets of a
reasonable size to that endpoint (Cisco media gateway are one example of this situation).In these cases, during a T.38 call you
will see warring messages on The console/in the logs from the Asterisk UDPTL stack complaining about lack of buffer space to
send T.38FaxMaxDatagram value specified by the other end[point, and use a configured value instead.
Fax
FAX detection will cause the SIP channel to jump to the 'faX' extension (if exists) based one or more events being detected. The
Detect
events that can be detected are an incoming CNG tone or an incoming T.38 re-INVITE request.
Fax
activate T38 fax gateway with 'timeout' seconds
Activity
Fax
activate T38 fax gateway with 'timeout' seconds
Timeout
IAX2 Endpoint
You can click button as shown below
Figure 4-1-5 IAX2 Endpoint
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