Thanks for your quick response.
Actually i solved the problem. Problem was related to domain name as you think. 
Now i can make outgoing calls however i can not receive any incoming calls. I 
am getting 404 Not Found message from SipRegistrar to SipProxy. Do i have to 
define a mapping rule or create a dial plan  for incoming calls? Or what should 
i have to check?

Thanks in advance.   

Here is the message flow:

Time: 2009-01-28T13:43:20.411381Z
Frame: 594 sipXproxy.xml:1116
Source: 47.165.158.121:5060
Dest: pingtel.europe.nortel.com-SipXProxy

INVITE 
sip:4000;user=phone;[email protected]:5060;maddr=47.168.76.4
 SIP/2.0
From: 
"2165224085"<sip:2165224085;user=phone;[email protected]>;tag=1181468510
To: "4000"<sip:4000;user=phone;[email protected]>
Call-ID: 30df97a0_11f1de54...@co11sip1
CSeq: 72530 INVITE
Via: SIP/2.0/UDP 47.165.158.121:5060;branch=z9hG4bK-1700b-59dae7c-762679aa
Content-Type: application/sdp
Contact: <sip:[email protected]:5060;maddr=47.165.158.121>
User-Agent:  Nortel SESM 10.3.1.7
Max-Forwards: 20
Supported: 
com.nortelnetworks.firewall,p-3rdpartycontrol,nosec,join,x-nortel-sipvc,com.nortelnetworks.im.encryption
P-Asserted-Identity: 
<sip:2165224085;user=phone;[email protected]>
x-nt-corr-id: 1529.000-17-39-13...@211
Content-Length: 269

v=0
o=IWSPM 635546153 635546153 IN IP4 47.165.158.82
s=-
[email protected]
c=IN IP4 47.165.158.82
t=0 0
m=audio 32130 RTP/AVP 18 8 0 101
a=ptime:10
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
m=image 42130 udptl t38
a=T38FaxUdpEC:t38UDPRedundancy




Time: 2009-01-28T13:43:20.412015Z
Frame: 595 sipXproxy.xml:1122
Source: pingtel.europe.nortel.com-SipXProxy
Dest: 47.165.158.121:5060

SIP/2.0 100 Trying
From: 
"2165224085"<sip:2165224085;user=phone;[email protected]>;tag=1181468510
To: "4000"<sip:4000;user=phone;[email protected]>
Call-Id: 30df97a0_11f1de54...@co11sip1
Cseq: 72530 INVITE
Via: SIP/2.0/UDP 47.165.158.121:5060;branch=z9hG4bK-1700b-59dae7c-762679aa
Content-Length: 0




Time: 2009-01-28T13:43:20.413831Z
Frame: 596 sipregistrar.xml:701 sipXproxy.xml:1132
Source: pingtel.europe.nortel.com-SipXProxy
Dest: pingtel.europe.nortel.com-SipRegistrar

INVITE sip:4000;user=phone;[email protected] 
SIP/2.0
Record-Route: <sip:47.168.76.4:5060;lr>
From: 
"2165224085"<sip:2165224085;user=phone;[email protected]>;tag=1181468510
To: "4000"<sip:4000;user=phone;[email protected]>
Call-Id: 30df97a0_11f1de54...@co11sip1
Cseq: 72530 INVITE
Via: SIP/2.0/TCP 
47.168.76.4;branch=z9hG4bK-sipXecs-0027f66761b69ae5bb35d420eb8b857c41da
Via: SIP/2.0/UDP 47.165.158.121:5060;branch=z9hG4bK-1700b-59dae7c-762679aa
Content-Type: application/sdp
Contact: <sip:[email protected]:5060;maddr=47.165.158.121>
User-Agent: Nortel SESM 10.3.1.7
Max-Forwards: 19
Supported: 
com.nortelnetworks.firewall,p-3rdpartycontrol,nosec,join,x-nortel-sipvc,com.nortelnetworks.im.encryption
P-Asserted-Identity: 
<sip:2165224085;user=phone;[email protected]>
X-Nt-Corr-Id: 1529.000-17-39-13...@211
Content-Length: 269
Date: Wed, 28 Jan 2009 13:43:20 GMT
X-Sipx-Spiral: true
Route: <sip:47.168.76.4:5070;transport=tcp;lr>

v=0
o=IWSPM 635546153 635546153 IN IP4 47.165.158.82
s=-
[email protected]
c=IN IP4 47.165.158.82
t=0 0
m=audio 32130 RTP/AVP 18 8 0 101
a=ptime:10
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
m=image 42130 udptl t38
a=T38FaxUdpEC:t38UDPRedundancy




Time: 2009-01-28T13:43:20.414603Z
Frame: 597 sipregistrar.xml:706 sipXproxy.xml:1135
Source: pingtel.europe.nortel.com-SipRegistrar
Dest: pingtel.europe.nortel.com-SipXProxy

SIP/2.0 100 Trying
From: 
"2165224085"<sip:2165224085;user=phone;[email protected]>;tag=1181468510
To: "4000"<sip:4000;user=phone;[email protected]>
Call-Id: 30df97a0_11f1de54...@co11sip1
Cseq: 72530 INVITE
Via: SIP/2.0/TCP 
47.168.76.4;branch=z9hG4bK-sipXecs-0027f66761b69ae5bb35d420eb8b857c41da
Via: SIP/2.0/UDP 47.165.158.121:5060;branch=z9hG4bK-1700b-59dae7c-762679aa
Content-Length: 0




Time: 2009-01-28T13:43:20.416170Z
Frame: 598 sipregistrar.xml:730 sipXproxy.xml:1142
Source: pingtel.europe.nortel.com-SipRegistrar
Dest: pingtel.europe.nortel.com-SipXProxy

SIP/2.0 404 Not Found
From: 
"2165224085"<sip:2165224085;user=phone;[email protected]>;tag=1181468510
To: "4000"<sip:4000;user=phone;[email protected]>
Call-Id: 30df97a0_11f1de54...@co11sip1
Cseq: 72530 INVITE
Via: SIP/2.0/TCP 
47.168.76.4;branch=z9hG4bK-sipXecs-0027f66761b69ae5bb35d420eb8b857c41da
Via: SIP/2.0/UDP 47.165.158.121:5060;branch=z9hG4bK-1700b-59dae7c-762679aa
User-Agent: sipXecs/3.10.3 sipXecs/registry (Linux)
Date: Wed, 28 Jan 2009 13:43:20 GMT
Allow: INVITE, ACK, CANCEL, BYE, REFER, OPTIONS, REGISTER, SUBSCRIBE
Accept-Language: en
Supported: gruu
Content-Length: 0




Time: 2009-01-28T13:43:20.416688Z
Frame: 599 sipregistrar.xml:732 sipXproxy.xml:1147
Source: pingtel.europe.nortel.com-SipXProxy
Dest: pingtel.europe.nortel.com-SipRegistrar

ACK sip:4000;user=phone;[email protected] SIP/2.0
Route: <sip:47.168.76.4:5070;transport=tcp;lr>
Contact: <sip:[email protected]:5060;maddr=47.165.158.121>
From: 
"2165224085"<sip:2165224085;user=phone;[email protected]>;tag=1181468510
To: "4000"<sip:4000;user=phone;[email protected]>
Call-Id: 30df97a0_11f1de54...@co11sip1
Cseq: 72530 ACK
Max-Forwards: 20
Via: SIP/2.0/TCP 
47.168.76.4;branch=z9hG4bK-sipXecs-0027f66761b69ae5bb35d420eb8b857c41da
Content-Length: 0




Time: 2009-01-28T13:43:20.417410Z
Frame: 600 sipXproxy.xml:1158
Source: pingtel.europe.nortel.com-SipXProxy
Dest: 47.165.158.121:5060

SIP/2.0 404 Not Found
From: 
"2165224085"<sip:2165224085;user=phone;[email protected]>;tag=1181468510
To: "4000"<sip:4000;user=phone;[email protected]>
Call-Id: 30df97a0_11f1de54...@co11sip1
Cseq: 72530 INVITE
Via: SIP/2.0/UDP 47.165.158.121:5060;branch=z9hG4bK-1700b-59dae7c-762679aa
User-Agent: sipXecs/3.10.3 sipXecs/registry (Linux)
Date: Wed, 28 Jan 2009 13:43:20 GMT
Allow: INVITE, ACK, CANCEL, BYE, REFER, OPTIONS, REGISTER, SUBSCRIBE
Accept-Language: en
Supported: gruu
Content-Length: 0



Time: 2009-01-28T13:43:20.419080Z
Frame: 601 sipXproxy.xml:1162
Source: 47.165.158.121:5060
Dest: pingtel.europe.nortel.com-SipXProxy

ACK 
sip:4000;user=phone;[email protected]:5060;maddr=47.168.76.4
 SIP/2.0
From: 
"2165224085"<sip:2165224085;user=phone;[email protected]>;tag=1181468510
To: "4000"<sip:4000;user=phone;[email protected]>
Call-ID: 30df97a0_11f1de54...@co11sip1
CSeq: 72530 ACK
Via: SIP/2.0/UDP 47.165.158.121:5060;branch=z9hG4bK-1700b-59dae7c-762679aa
Max-Forwards: 70
Content-Length: 0









________________________________
From: Dale Worley <[email protected]>
To: rgxv zxv <[email protected]>
Cc: [email protected]
Sent: Tuesday, January 27, 2009 9:11:58 PM
Subject: Re: [sipx-users] I can not make outgoing calls because of loop

On Mon, 2009-01-26 at 23:41 -0800, rgxv zxv wrote:
> I am a newbie and trying to make calls with SIPX. I installed and
> configured sipx. I am using an external DNS server and just have A
> entries for my domain. That's why i am using Fully Qualified host name
> (pingtel.europe.nortel.com). 

The usual cause for this sort of problem is that some SIP domain name
routes to the server, but the server isn't configured to think of that
domain name as it's domain name.  In this case, have you looked at the
domain name configuration to verify that pingtel.europe.nortel.com is
the SIP domain?  (And check for misspellings!)

In general, if you need a problem diagnosed, you should take a snapshot
and attach it to your message.

Dale


      
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