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Unable to send FAX

I use 2 linksys SPA 8000 and asterisk 1.6.2.1 with 13 telephones. I also use openvox A800P whith 5 FXO modules connected to PSTN. When i try to send fax using FXO port: i can speak to person, but when I press start button to send fax using Canon FAX-L220 there are mistake. Fax doesn't get a list of paper. Sometimes i've got message

[Mar 15 11:54:42] NOTICE[11116]: rtp.c:1790 ast_rtp_read: Unknown RTP codec 100 received from '192.168.0.130'

This message dissapered when i wrote t38pt_udptl = yes in sip.conf.

There are my peers:


[1012]
type=friend
host=dynamic
username=1012
secret=1012
defaultuser=1012
context=srv
canreinvite=yes
t38pt_udptl=yes
callerid=1012<1012>
disallow=all
allow=ulaw
allow=alaw
qualify=no

there are attachments with screenshots of my spa8000:

info.jpg

system.jpg

sip.jpg

regional.jpg

L1.jpg

L2.jpg

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