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[asterisk at voipbusine...]

All;
I’m having a problem sending an outbound fax using Asterisk-1.8.15-cert3 and the spandsp fax module using a SIP trunk. I’m seeing hundreds of these:

ERROR[14423]: udptl.c:294 encode_open_type: UDPTL (SIP/runcentral_outbound-00000074): Buffer overflow detected (59 + 134 > 175)

Has anyone ever seen this before? I have the following configuration.

udptl.conf:
[general]
udptlstart = 4000
udptlend = 4999
udptlfecentries = 3
udptlfecspan = 3
use_even_ports = no
T38FaxUdpEC = t38UDPFEC
udptlchecksums = no

sip.conf:
faxdetect=yes
t38pt_rtp=no
t38pt_tcp=no
t38pt_udptl=yes,fec
t38pt_usertpsource=yes

Any help at all would be greatly appreciated.
Thanks;
John
Tech Support
Tech Support
VoIP Business Solutions
240-215-3479
support@voipbusiness.us (fsd@voipbusiness.us)