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 <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>> wrote: > > On Dec 28, 2007 8:28 PM, Al lists <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>> 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? > > _______________________________________________ > --Bandwidth and Colocation Provided by http://www.api-digital.com-- > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > <http://lists.digium.com/mailman/listinfo/asterisk-users> > > > ------------------------------------------------------------------------ > > _______________________________________________ > --Bandwidth and Colocation Provided by http://www.api-digital.com-- > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users
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