We have two asterisk back to back connected over PRI T1 and i am testing FAX over T1 line. Its working fine and i am getting fax file as well but i got "WARNING T.30 ECM carrier not found" is it safe to ignore this WARNING ? spandsp-0.0.6pre18 Asterisk-1.8.3.3 [from-pstn] ;Fax testing exten => 8000,1,Set(FAXFILE=/var/spool/asterisk/fax/${CALLERID(num).tif) exten => 8000,n,Set(FAXFILENOEXT=/var/spool/asterisk/fax/${CALLERID(num)) exten => 8000,n,ReceiveFax(${FAXFILE}) shirley*CLI> -- Accepting call from '' to '8000' on channel 0/1, span 1 -- Executing [8000 at from-pstn:1] Set("DAHDI/i1/-8", "FAXFILE=/var/spool/asterisk/fax/.tif") in new stack -- Executing [8000 at from-pstn:2] Set("DAHDI/i1/-8", "FAXFILENOEXT=/var/spool/asterisk/fax/") in new stack -- Executing [8000 at from-pstn:3] ReceiveFAX("DAHDI/i1/-8", "/var/spool/asterisk/fax/.tif") in new stack -- Channel 'DAHDI/i1/-8' receiving FAX '/var/spool/asterisk/fax/.tif' -- Channel 1 echo canceler disabled its NLP. -- Channel 1 detected a CED tone towards the network. [Apr 22 12:57:27] WARNING[5002]: res_fax_spandsp.c:367 spandsp_log: WARNING T.30 ECM carrier not found -- Executing [8000 at from-pstn:4] Hangup("DAHDI/i1/-8", "") in new stack == Spawn extension (from-pstn, 8000, 4) exited non-zero on 'DAHDI/i1/-8' -- Hungup 'DAHDI/i1/-8' -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20110422/25b9c3a1/attachment.htm>