Re: [asterisk-users] Asterisk 1.4 Fax

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@gmail.com> wrote:

On Dec 28, 2007 8:28 PM, Al lists <asteriskal@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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