ET 200X(L) Series Digital Gateway User Manual
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Honor SDP Version By default, the gateway will honor the session version number in SDP packets and will
only modify the SDP session if the version number changes. Turn This option off to
force the SDP session version number and treat all SDP data as new data. This is
require for devices that send non-standard SDP packets (observed with Microsoft OC
S).By default
This option is on.
Allow Transfers
Whether or not to globally enable transfers. Choosing ‘no’ will disable all transfers
(unless enable in peers or users). Default is enabled.
Allow Promiscuous
Redirects
Whether or not to allow 302 or REDIR to non-local SIP address .Note that promiscredir
when redirects are made to the local system will cause loops since this gateway is
incapable of performing a ‘hairpin’ call.
Max Forwards
Setting for the SIP Max-Forwards header (loop prevention).
Send TRYING on
REGISTER
Send 100 Trying when the endpoint registers.
Table 4-1-6 Definition of Fax Options
Options
Definition
Mode
Working mode T.38 and T.30
Enabled
Enabled
Error Correction
Error Correction
Max Datagram
In some cases,T.38 endpoints will provide a T38FaxMxDatagram value (during T.38
setup) that is based on an incorrect 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 Detect
FAX detection will cause the SIP channel to jump to the ‘faX’ extension (if exists) based