[asterisk-users] Asterisk 1.4 Fax

[Rob Hillis]

Unless your provider provides a T.38 gateway, fax over SIP is pretty
much guaranteed to be unusable.  Often you can get away with it over a
LAN using G711a or G711u, but any of the lower bandwidth codecs /won't/
be able to properly handle fax calls.

Whilst I haven't used it myself, I believe IAXmodem and Hylafax are used
for sending and receiving faxes from a local PSTN termination point such
as T1 or ISDN.

The IAXmodem web site explains the pitfalls of faxing over the
internet.  See http://iaxmodem.sourceforge.net/faq.php for more info. 
Last time I heard IAXModem didn't support T.38 because the IAX2 protocol
didn't support T.38 - whether that's still the case or not, I don't know.

Al lists wrote:
> at this time is terminating a SIP trunk,
> each DID will get its own fax box.
> I guess at this time i'm looking to find a tutorial for installing
> iaxmodem and hylafax as it seems to be the answer.
>
>
> On Dec 31, 2007 9:11 PM, Andrew Joakimsen <joakimsen at gmail.com
> <mailto:joakimsen at gmail.com>> wrote:
>
>     On Dec 28, 2007 8:28 PM, Al lists <asteriskal at gmail.com
>     <mailto:asteriskal at gmail.com>> wrote:
>     > what method is preferred:
>     > haylafax and Iaxmodem or spnadsp for faxing.
>     >
>
>     What are you trying to do and do you have a T1 or ISDN line?
>
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