Hi Ali, When I do the testing, it seems that in the SER, there are something configured for requiring an authentification for the re-invite. Does SER send an authentificatin required back? Thanks. Best regards, RoaYu _____ From: Ali Zaidi [mailto:aligzaidi@gmail.com] Sent: Thursday, March 06, 2008 2:06 PM To: roayu Cc: serusers(a)lists.iptel.org Subject: Re: [Serusers] SER + Fax service Roa, It will work, as long as you use g711, make sure both end use same codec. The reason i said use g711 because fax does not like any compression during transmission, so keep it simple. Ali... On Wed, Mar 5, 2008 at 9:30 PM, roayu &lt;roayu(a)ctisys.net <mailto:roayu@ctisys.net> > wrote: Good day! I just brought an ATA that support Fax and I would like to know does SER able to handle the fax service as well? My environment is as the following: Fax machine A --> ATA --> SER --> ATA --> Fax machine B Is there any issue to perform the above transaction? Or is there any setting that I need to configure on SER ? Thanks. Best regards, Roa Yu _______________________________________________ Serusers mailing list Serusers(a)lists.iptel.org <mailto:Serusers@lists.iptel.org> http://lists.iptel.org/mailman/listinfo/serusers <http://lists.iptel.org/mailman/listinfo/serusers>