[asterisk-bugs] [JIRA] (ASTERISK-16765) app_fax.c: Transmission error for successfully transmitted faxes

[Matt Jordan (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-16765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=225166#comment-225166 ] 

Matt Jordan commented on ASTERISK-16765:
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Per the Asterisk versions page [1], the maintenance (bug fix) support for the Asterisk branch you are using has ended. For continued maintenance support please move to a supported branch of Asterisk. After testing with a supported branch, if you find this problem has not been resolved, please open a new issue against the latest version of that Asterisk branch.

Thanks!

[1] https://wiki.asterisk.org/wiki/display/AST/Asterisk+Versions

Additionally, {{app_fax}} has been supplanted by {{res_fax}}, which provides the same dialplan applications as well as a better facade over {{res_fax_spandsp}}. As such, {{app_fax}} is an extended support module, and may not receive much attention. If you find this is still a problem in a supported branch with {{app_fax}}, you may want to consider migrating to {{res_fax}}, which is unlikely to exhibit the same issues.

> app_fax.c: Transmission error for successfully transmitted faxes
> ----------------------------------------------------------------
>
>                 Key: ASTERISK-16765
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-16765
>             Project: Asterisk
>          Issue Type: Bug
>          Components: Applications/app_fax
>            Reporter: Jan Klepal
>            Severity: Minor
>
> Sometimes application SendFAX indicates "app_fax.c:817 transmit: Transmission error" even the transmission of FAX was successful "app_fax.c: Fax transmitted successfully". I figured out it happens because res value in loop is set to 4 (probably because remote party hangs first?).
> I am not sure if the problem is bug or just not expected behavior of SendFAX application. Because in following scenario external application will not be notified:
> {noformat}
> exten => s,1,Noop()
> exten => s,n,SendFax(${FAXFILE})
> exten => s,n,System(/opt/fax/notify.py "${FAXID}" "${FAXSTATUS}" "${FAXERROR}")
> {noformat}
> Workaround is to use "h" extension to catch transmitted faxes with any result.
> {noformat}
> exten => s,1,Noop()
> exten => s,n,SendFax(${FAXFILE})
> exten => h,n,System(/opt/fax/notify.py "${FAXID}" "${FAXSTATUS}" "${FAXERROR}")
> {noformat}
> Maybe similar option like "g" in Dial application would be nice in SendFAX application... or at least note in documentation :-)
> *ADDITIONAL INFORMATION*
> {noformat}
> [2010-10-04 18:48:40.256] DEBUG[3903] app_fax.c: FLOW T.30 Send complete in phase T30_PHASE_D_TX, state 3
> [2010-10-04 18:48:40.256] DEBUG[3903] app_fax.c: FLOW T.30 Disconnecting
> [2010-10-04 18:48:40.256] DEBUG[3903] app_fax.c: FLOW T.30 Changing from phase T30_PHASE_D_TX to T30_PHASE_E
> [2010-10-04 18:48:40.256] DEBUG[3903] app_fax.c: FLOW T.38T Set rx type 0
> [2010-10-04 18:48:40.256] DEBUG[3903] app_fax.c: FLOW T.38T Set tx type 1
> [2010-10-04 18:48:40.256] DEBUG[3903] app_fax.c: FLOW T.30 Changing from state 3 to 2
> [2010-10-04 18:48:40.800] DEBUG[3903] app_fax.c: T38 down, finishing
> [2010-10-04 18:48:40.800] DEBUG[3903] app_fax.c: Loop finished, res=4
> [2010-10-04 18:48:40.800] DEBUG[3903] app_fax.c: Fax phase E handler. result=0
> [2010-10-04 18:48:40.804] DEBUG[3903] app_fax.c: Fax transmitted successfully.
> [2010-10-04 18:48:40.804] DEBUG[3903] app_fax.c:   Remote station ID: 123456789
> [2010-10-04 18:48:40.805] DEBUG[3903] app_fax.c:   Pages transferred: 1
> [2010-10-04 18:48:40.805] DEBUG[3903] app_fax.c:   Image resolution:  8031 x 7700
> [2010-10-04 18:48:40.805] DEBUG[3903] app_fax.c:   Transfer Rate:     14400
> [2010-10-04 18:48:40.806] DEBUG[3903] app_fax.c: FLOW T.30 Changing from state 2 to 32
> [2010-10-04 18:48:40.806] DEBUG[3903] app_fax.c: FLOW T.30 Changing from phase T30_PHASE_E to T30_PHASE_CALL_FINISHED
> [2010-10-04 18:48:40.806] DEBUG[3903] app_fax.c: FLOW T.38T Set rx type 13
> [2010-10-04 18:48:40.806] DEBUG[3903] app_fax.c: FLOW T.38T Set tx type 13
> [2010-10-04 18:48:40.806] DEBUG[3903] app_fax.c: FLOW T.38T FAX exchange complete
> [2010-10-04 18:48:40.806] WARNING[3903] app_fax.c: Transmission error
> [2010-10-04 18:48:40.807] DEBUG[3903] pbx.c: Spawn extension (outgoing,s,2) exited non-zero on 'SIP/sipy_246035404-00000010'
> {noformat}



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