asterisk users - May 2005 - How do I diagnose the problem in this Asterisk test session with FWD?

============SJphone Log
===========Outgoing SIP session
Respondent:   (sip:8612@192.168.2.2)
Remote client:
Started:  May 26 16:33
Accepted:  no
Ended:  May 26 16:34
End reason:  Call rejected: 503 Service Unavailable

==============Asterisk Debug
===============Executing Dial("SIP/2201-a83e",
"IAX2/<FWDNUMBER>:@iax2.fwdnet.net/612|60|r")
in new stack
    -- Called <FWDNUMBER>:@iax2.fwdnet.net/612
Tx-Frame Retry[000] -- OSeqno: 000 ISeqno: 000 Type: IAX     Subclass: NEW
   Timestamp: 00014ms  SCall: 00003  DCall: 00000 [65.39.205.121:4569]
   VERSION         : 2
   CALLED NUMBER   : 612
   CALLING NAME    : MyName
   LANGUAGE        : en
   USERNAME        : <FWDNUMBER>
   FORMAT          : 4
   CAPABILITY      : 63494
   ADSICPE         : 2
   DATE TIME       : 179995695

Tx-Frame Retry[001] -- OSeqno: 000 ISeqno: 000 Type: IAX     Subclass: REGREQ
   Timestamp: 00019ms  SCall: 00001  DCall: 00000 [65.39.205.121:4569]
   USERNAME        : <FWDNUMBER>
   REFRESH         : 60

Tx-Frame Retry[001] -- OSeqno: 000 ISeqno: 000 Type: IAX     Subclass: NEW
   Timestamp: 00014ms  SCall: 00003  DCall: 00000 [65.39.205.121:4569]
   VERSION         : 2
   CALLED NUMBER   : 612
   CALLING NAME    : MyName
   LANGUAGE        : en
   USERNAME        : <FWDNUMBER>
   FORMAT          : 4
   CAPABILITY      : 63494
   ADSICPE         : 2
   DATE TIME       : 179995695

Tx-Frame Retry[000] -- OSeqno: 001 ISeqno: 000 Type: IAX     Subclass: LAGRQ
   Timestamp: 10019ms  SCall: 00001  DCall: 00000 [65.39.205.121:4569]
Tx-Frame Retry[000] -- OSeqno: 001 ISeqno: 000 Type: IAX     Subclass: LAGRQ
   Timestamp: 10006ms  SCall: 00003  DCall: 00000 [65.39.205.121:4569]
Tx-Frame Retry[001] -- OSeqno: 001 ISeqno: 000 Type: IAX     Subclass: LAGRQ
   Timestamp: 10019ms  SCall: 00001  DCall: 00000 [65.39.205.121:4569]
Tx-Frame Retry[002] -- OSeqno: 000 ISeqno: 000 Type: IAX     Subclass: REGREQ
   Timestamp: 00019ms  SCall: 00001  DCall: 00000 [65.39.205.121:4569]
   USERNAME        : <FWDNUMBER>
   REFRESH         : 60

================IAX CONF
===============register => <FWDNUMBER>:FWDPASSWD@iax2.fwdnet.net

[iaxfwd]
type=user
auth=rsa
inkeys=freeworlddialup
disallow=all
context=fromiaxfwd
context=fwd-out

===============EXTENSIONS CONF
===============FWDUSERID1=<FWDNUMBER> ; your calling number
FWDCIDNAME="MyName"; your caller id
FWDPASSWORD=secret ; your password
FWDRINGS=sip/2201 ; the phone to ring
FWDVMBOX=2201 ; the VM box for this user
FWDPREFIX=8

[inbound-fwd]
include => daytime-fwd|9:00-21:00|*|*
include => nighttime-fwd|21:00-9:00|*|*

;
; Outbound
;

[fwd-out]
exten => _8.,1,SetCallerID(${FWDCIDNAME})
exten => _8.,2,Dial(IAX2/${FWDUSERID1}:
${FWDPASSWORD}@iax2.fwdnet.net/${EXTEN:1},60,r)
exten => _8.,3,Congestion
exten => _8.,4,Macro(fastbusy)
exten => _8.,5,Hangup

[fromiaxfwd]
exten => ${FWDUSERID1},1,Goto(inbound-fwd,s,1)
exten => ${FWDUSERID1},2,Voicemail2,u${FWDVMBOX}
exten => ${FWDUSERID1},102,Voicemail2,b${FWDVMBOX}
exten => ${FWDUSERID1},3,Hangup

[dialout]
include => fwd-out
include => fromiaxfwd

Thanks

> Call rejected: 503 Service Unavailable
The above is quite correct. You will notice that there is no answer
from FWD whatsoever to the NEW or REGREQ packets. Either your firewall
is blocking IAX traffic (incoming or outgoing), FWD's IAX is down or
unreachable from your location due to network trouble.

"iax2 show registry" probably shows "Request Sent". My
suggestion, try
again later or use tcpdump to check for IAX traffic on your interface
(like "tcpdump -n src or dst port 4569").

--Luki