Fax modem? Fax software? Neo as T.38 gateway?

[Jonathon Suggs]

Harald Welte wrote:
> yes, the GSM Modem we use has standard AT command Fax modem functionality.

I'm not 100% sure about everything I'm about to say, but I vaguely remember some things from a similar discussion a while back.

In order for you to send/receive fax via a GSM connection requires you to notify your carrier and them enable some features (CSD fax/data service plan).

Here are some links that have some information, but I'm not sure how current it is...
http://www.howardforums.com/archive/topic/598950-1.html
http://www.conklinsystems.com/palm/forum/viewtopic.php?t=212&sid=4513920d88d45b8bc13c2d1b1bc4f661
http://www.ksesoftware.com/showthread.php?id=21

Hope this helps...