[asterisk-users] OT - Is T.38 possible on SPA8800 FXO port ?

Larry Moore lmoore at omninet.net.au
Mon Nov 17 05:34:18 CST 2014

On 17/11/2014 6:42 PM, Olivier wrote:
> Hello,
> If I'm not mistaken, it is not possible to get T.38 on a SPA3102 FXO
> port (it is possible with the FXS port).
> Do you know, by experience preferably, if this is possible with an
> SPA8800 FXO port ?

Perhaps page 50 (Using a Fax Machine) of this document 
will answer your question.

There is also another document you may want to reference.


In your sip.conf configuration you will need;


For newer version of Asterisk I expect you would set;


You may want to change the SPA8800 option 'FAX T38 Redundancy' to the 
value you have set for redundancy in udptl.conf or 3 if using the 
default settings.

It's been a while since I played with my SPA8800, with the test I 
performed it did work, that was inbound and outbound calls.


More information about the asterisk-users mailing list