[asterisk-bugs] [Asterisk 0016124]: Trying to send a fax with zoiper (t38) causes "buffer overflow message too long"

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=16124 
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Reported By:                darkbasic
Assigned To:                kpfleming
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Project:                    Asterisk
Issue ID:                   16124
Category:                   Channels/chan_sip/T.38
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     assigned
Asterisk Version:           SVN 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): 1.6.2 
SVN Revision (number only!): 225516 
Request Review:              
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Date Submitted:             2009-10-24 18:09 CDT
Last Modified:              2009-10-24 19:32 CDT
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Summary:                    Trying to send a fax with zoiper (t38) causes
"buffer overflow message too long"
Description: 
This is my sip.conf:

[general]
t38pt_udptl=yes
language=it
context=default
bindport=5060
externhost=<host>
externrefresh=5
localnet=192.168.1.0/255.255.255.0
nat=yes
register=<number>:<password>@voip.eutelia.it:5060/<number>

[159]
language=it
type=friend
bindport=5060
context=phones-sip
host=dynamic
secret=<password>
nat=no
t38pt_udptl=yes
qualify=yes

[eutelia]
language=it
type=friend
host=voip.eutelia.it
username=<number>
fromuser=<number>
secret=<password>
port=5060
nat=yes
qualify=yes
canreinvite=no ;asterisk is always used as media proxy, I tried also with
yes
dtmfmode=rfc2833
insecure=invite,port
context=eutelia-in
t38pt_udptl=yes

This is udptl.conf:
[general]
udptlstart=4000
udptlend=4999
udptlfecentries = 3
udptlfecspan = 3
use_even_ports = no


I attached full => notice,warning,error,debug,verbose with 'core set
verbose 10, 'core set debug 10', 'sip set debug on', and 'sip set history
on'.
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---------------------------------------------------------------------- 
 (0112697) kpfleming (administrator) - 2009-10-24 19:32
 https://issues.asterisk.org/view.php?id=16124#c112697 
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As the log message indicates, you'll need to override the maxdatagram value
in sip.conf for the endpoint that caused this problem; please read the
documentation in sip.conf.sample about the t38pt_udptl parameter and how to
configure the system to avoid this problem. 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2009-10-24 19:32 kpfleming      Note Added: 0112697                          
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