Fax is not received

After trying to use Fax2Email functionality in Asterisk CLI you see:

• Check permissions on /var/spool/asterisk/faxes
• Make sure UDTP range 4000-4999 is open on the firewall.

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mor_fax2email: MOR Fax2Email v0.1.3 AGI script started.
mor_fax2email: Failed to connect database server. Check debug for more info.
mor_fax2email: ERROR! Not connected to database.

Solution:

In /var/lib/asterisk/agi-bin/mor.conf correct DB connection settings.

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__ast_pbx_run: Channel 'Local/999@mor_local-1217,2' sent into invalid extension 'fax' in context 'mor_fax2email', but no invalid handler

Make sure /etc/asterisk/extensions_mor.conf has such line:

[mor_fax2email]

exten => _X.,1,Answer
exten => _X.,2,StopPlaytones
exten => _X.,3,Playback(beep)
exten => _X.,4,Set(FAXFILE=${CDR(UNIQUEID)})
exten => _X.,5,RxFax(/var/spool/asterisk/faxes/${FAXFILE}.tif)

exten => fax,1,Goto(mor_fax2email,111,1)

exten => h,1,DeadAGI(mor_fax2email)
exten => h,2,Hangup

If not - add such line (marked in bold) and reload Asterisk.

ERROR! TIF file does not exist!

If you get a similar output in Asterisk CLI:

mor_fax2email:
mor_fax2email: MOR Fax2Email AGI script started.
mor_fax2email: Successfully connected to database.
mor_fax2email: from sender: , fax file: 1311285609.5, faxsender: 311043455xx, fax_id :14, pdf file: /var/spool/asterisk/faxes/1311285609.5.pdf, tif file: /var/spool/asterisk/faxes/1311285609.5.tif
[2011-07-22 00:01:52] NOTICE[3316]: app_mor_debug.c:168 process_call_details: RTPAUDIOQOS: ssrc=655552979;themssrc=428650528;lp=0;rxjitter=0.006493;rxcount=4511;txjitter=0.002304;txcount=541;rlp=0;rtt=0.020000
[2011-07-22 00:01:52] NOTICE[3316]: app_mor_debug.c:186 process_call_details: PDD:
[2011-07-22 00:01:52] NOTICE[3316]: app_mor.c:2407 mor_acct_stop: Reseller's balance will be deducted by: 0.000000, and frozen balance by: 0.000000.
mor_fax2email: ERROR! TIF file does not exist!
-- AGI Script mor_fax2email completed, returning 0
-- Executing [h@mor_fax2email:2] Hangup("Local/910007@mor_local-1f39,2", "") in new stack
== Spawn extension (mor_fax2email, h, 2) exited non-zero on 'Local/91000x@mor_local-1f39,2'

the problem can be anywhere if you get this error. Please see this page: FAX over VoIP

Make sure T38 was not enabled

If you face a problem with FAX not being received, two ways to detect this problem:

• Fax call takes about 30 seconds, and faxes not trains (if the codec is G729, call takes a little bit more than 40seconds and fails)

• Make a SIP debug, and you will see like this:

v=0.
o=CiscoSystemsSIP-GW-UserAgent 7568 7687 IN IP4 195.62.x.x.
s=SIP Call.
c=IN IP4 ip.add.re.ss.
t=0 0.
m=image 52972 udptl t38.
c=IN IP4 ip.add.re.ss.
a=T38FaxVersion:0.
a=T38MaxBitRate:14400.
a=T38FaxFillBitRemoval:0.
a=T38FaxTranscodingMMR:0.
a=T38FaxTranscodingJBIG:0.
a=T38FaxRateManagement:transferredTCF.
a=T38FaxMaxBuffer:200.
a=T38FaxMaxDatagram:72.
a=T38FaxUdpEC:t38UDPRedundancy.

Solution, check in sip.conf:

t38pt_udptl = no (be sure, it's NOT yes)

FAX is not received on ZAP channel

When ZAP channel is used, FAX device should be assigned to Asterisk server which has ZAP/DAHDI cards installed. Please make sure that correct Asterisk server is specified in "Server" drop-down list on FAX device settings.

It can be an issue when you have more than one Asterisk server only.

See also

• I have a problem with Fax
• Fax over VoIP