I have the following situation

fax-ata 
-----------------sip-------------------openpbx------sipT38------------openpbx---------------sip--------ata-fax


So I want to send fax from one site to the other by using t38 in
between openpbx machines. If I understood this correctly openpbx 1 and
2 shoud be t.38 gateways then.

sip.conf
[6000] ;this is a link between openpbx's and is almost the same on both sides
type=friend
username=6000
secret=6000
host=192.168.0.5
nat=never
disallow=all
allow=alaw
dtmfmode=info
qualify=yes
context=fax-in
canreinvite=yes


extensions.conf 1st pbx (sender ata is here SIP/300)
[fax-out]
exten => _X.,1,SipT38SwitchOver()
exten => _X.,2,T38Gateway(SIP/6000/100)
exten => _X.,3,Dial(SIP/6000/100)

extensions.conf 2nd pbx (reciever ata is here SIP/100)
[fax-in]
exten => _X.,1,FaxDetect(4000)
exten => fax,1,T38Gateway(SIP/100)


In my packet sniffer I see call being established, but the reciever
keeps sending:
t38:t30 Ind:no-signal
t38:t30 Ind:v21-preamble
t38:v21:HDLC:Called Subscriber Identification

to the sender pbx, and that rotates those messages, no answer from
sender though.

In the reciever log I see:
May 21 15:38:33 WARNING[3055397808]: app_t38gateway.c:181
t38_tx_packet_handler: t38_tx_packet_handler: Sending 1 copies of
frame

repeating all the time.

Any ideas?
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