I have a new installation of Callweaver in Ubuntu that I'm trying to get
T.38 faxing working on.  The error I'm getting when trying to fax from one
extension to another is:
Oct 14 21:42:16 WARNING[3061463952]: chan_sip.c:4720 process_sdp: Unable to
lookup host in c= line, 'IN IP4 5004t=0 0'
I've attached a zipped debug log using Tshark.  I think it shows that the
first fax (2012) is talking to the 2nd fax (2101), but not
completing the handshake.
Anyone heard of this error before?
I get the same error when trying to fax out to the PSTN via a T1 PRI.  
In case it's an error in my dial plan, this is my extensions.conf:
[general]
static=yes
writeprotect=no
autofallthrough=no
clearglobalvars=no
priorityjumping=no
srvlookup=yes
 
[globals]
CONSOLE=Console/dsp
TRUNKMSD=0
TRUNK=SIP/outbound

exten => t,1,Hangup()
 
exten => 0133,1,Dial(Sip/2012,20)
exten => 0133,n,Hangup
 
exten => 2012,1,SipT38SwitchOver()
exten => 2012,n,Dial(SIP/2012,20)
exten => 2012,n,Hangup

exten => 2181,1,Dial(SIP/2101,20)
exten => 2181,n,Hangup
 
exten => 2101,1,SipT38SwitchOver()
exten => 2101,n,Dial(SIP/2101,20)
exten => 2101,n,Hangup

exten => _NXXXXXX,1,SipT38SwitchOver()
exten => _NXXXXXX,2,Dial(${TRUNK}/701${EXTEN})  ; adding 701 for Qwest
 
exten => _NXXXXXXXXX,1,SipT38SwitchOver()
exten => _NXXXXXXXXX,2,Dial(${TRUNK}/${EXTEN})  ; allows 10 digit dialing
 
exten => _1NXXXXXXXXX,1,SipT38SwitchOver()
exten => _1NXXXXXXXXX,2,Dial(${TRUNK}/${EXTEN}) ; allows long distance
dialing

This is my sip.conf:
[general]
context=default                 ; Default context for incoming calls
bindport=5060                   ; UDP Port to bind to (SIP standard port is
5060)
bindaddr=209.xx.xxx.xxx
;bindaddr=0.0.0.0
t38udptlsupport=yes
disallow=all
allow=alaw
allow=ulaw
dtmfmode=inband
externip=209.xx.xxx.xxx
localnet=209.xx.xxx.0/255.255.255.248
srvlookup=yes
 
[2012]
type=friend
secret=bismar12
host=dynamic
nat=yes
qualify=yes
dtmfmode=inband
dial=SIP/2012
disallow=all
allow=ulaw
allow=alaw
canreinvite=no
srvlookup=yes
t38udptlsupport=yes

[2101]
type=friend
secret=bismar12
host=dynamic
nat=yes
qualify=yes
dtmfmode=inband
dial=SIP/2101
disallow=all
allow=ulaw
allow=alaw
canreinvite=no
srvlookup=yes
t38udptlsupport=yes

[outbound]              ; Audiocodes SIP gateway
type=peer
qualify=yes
host=209.x.xxx.xxx     ; Audiocodes SIP address
context=default
srvlookup=yes
nat=no
t38udptlsupport=yes
 
[inbound]               ; Audiocodes SIP gateway
type=user
context=default
srvlookup=no
t38udptlsupport=yes


Thank you.
Tim Davenport

Attachment: Callweaver Test.rar
Description: Binary data

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