I agree with you. I'm the one that fiddles and gums things up. Here's the results of my 600 test, which seemed OK to me.
© 2004 Xten Networks, Inc. All rights reserved.
X-Lite release 1105d build stamp 99999
License key: <removed key>
Established SIP protocol listen on: 192.168.0.3:5060
Discovered Port Restricted Cone NAT Firewall
SIP: 192.168.0.3:5060
RTP: 192.168.0.3:8000
NAT: 209.234.77.198
PROXY#0: 24.196.79.152:5060
SEND TIME: 737170283
SEND >> 24.196.79.152:5060
REGISTER sip:voxalot.com SIP/2.0
Via: SIP/2.0/UDP 209.234.77.198:5060;rport;branch=z9hG4bK3CFB1D1366 36E6F524C78B5C39A40EC3
From: 506167 <sip:506167@voxalot.com>;tag=981903498
To: 506167 <sip:506167@voxalot.com>
Contact: "506167" <sip:506167@209.234.77.198:5060>
Call-ID:
0B9C22CA288974B2691F124E8B72BC8B@voxalot.com
CSeq: 46890 REGISTER
Expires: 1800
Max-Forwards: 70
User-Agent: X-Lite release 1105d
Content-Length: 0
RECEIVE TIME: 737170405
RECEIVE << 24.196.79.152:5060
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 209.234.77.198:5060;rport=5060;branch=z9hG4bK3CFB1 D136636E6F524C78B5C39A40EC3
From: 506167 <sip:506167@voxalot.com>;tag=981903498
To: 506167 <sip:506167@voxalot.com>;tag=329cfeaa6ded039da25ff 8cbb8668bd2.0ee0
Call-ID:
0B9C22CA288974B2691F124E8B72BC8B@voxalot.com
CSeq: 46890 REGISTER
WWW-Authenticate: Digest realm="voxalot.com", nonce="44e87398c26d91b33c7ecac313f27bddb75ab760"
Server: OpenSer (1.0.1 (i386/linux))
Content-Length: 0
Warning: 392 24.196.79.152:5060 "Noisy feedback tells: pid=12173 req_src_ip=209.234.77.198 req_src_port=5060 in_uri=sip:voxalot.com out_uri=sip:voxalot.com via_cnt==1"
SEND TIME: 737170411
SEND >> 24.196.79.152:5060
REGISTER sip:voxalot.com SIP/2.0
Via: SIP/2.0/UDP 209.234.77.198:5060;rport;branch=z9hG4bK7F057A28F4 0A31197C91F29A09AF0F2C
From: 506167 <sip:506167@voxalot.com>;tag=981903498
To: 506167 <sip:506167@voxalot.com>
Contact: "506167" <sip:506167@209.234.77.198:5060>
Call-ID:
0B9C22CA288974B2691F124E8B72BC8B@voxalot.com
CSeq: 46891 REGISTER
Expires: 1800
Authorization: Digest username="506167",realm="voxalot.com",nonce="44e87 398c26d91b33c7ecac313f27bddb75ab760",response="58c 56f2e3796876ec5898c769b7f7f65",uri="sip:voxalot.co m"
Max-Forwards: 70
User-Agent: X-Lite release 1105d
Content-Length: 0
RECEIVE TIME: 737170537
RECEIVE << 24.196.79.152:5060
SIP/2.0 200 OK
Via: SIP/2.0/UDP 209.234.77.198:5060;rport=5060;branch=z9hG4bK7F057 A28F40A31197C91F29A09AF0F2C
From: 506167 <sip:506167@voxalot.com>;tag=981903498
To: 506167 <sip:506167@voxalot.com>;tag=329cfeaa6ded039da25ff 8cbb8668bd2.07f0
Call-ID:
0B9C22CA288974B2691F124E8B72BC8B@voxalot.com
CSeq: 46891 REGISTER
Contact: <sip:506167@209.234.77.198:5060>;expires=1800
Server: OpenSer (1.0.1 (i386/linux))
Content-Length: 0
Warning: 392 24.196.79.152:5060 "Noisy feedback tells: pid=12173 req_src_ip=209.234.77.198 req_src_port=5060 in_uri=sip:voxalot.com out_uri=sip:voxalot.com via_cnt==1"
SEND TIME: 737195863
SEND >> 24.196.79.152:5060
INVITE sip:600@voxalot.com SIP/2.0
Via: SIP/2.0/UDP 209.234.77.198:5060;rport;branch=z9hG4bK670D7573AD 983D3FA0A7CB42A945DA97
From: 506167 <sip:506167@voxalot.com>;tag=1868712778
To: <sip:600@voxalot.com>
Contact: <sip:506167@209.234.77.198:5060>
Call-ID: 531650F8-F2EA-56D9-79D5-DC2CA4F3AB0B@192.168.0.3
CSeq: 59778 INVITE
Max-Forwards: 70
Content-Type: application/sdp
User-Agent: X-Lite release 1105d
Content-Length: 313
v=0
o=506167 737195700 737195863 IN IP4 209.234.77.198
s=X-Lite
c=IN IP4 209.234.77.198
t=0 0
m=audio 8000 RTP/AVP 0 8 3 98 97 101
a=rtpmap:0 pcmu/8000
a=rtpmap:8 pcma/8000
a=rtpmap:3 gsm/8000
a=rtpmap:98 iLBC/8000
a=rtpmap:97 speex/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
RECEIVE TIME: 737196008
RECEIVE << 24.196.79.152:5060
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 209.234.77.198:5060;rport=5060;branch=z9hG4bK670D7 573AD983D3FA0A7CB42A945DA97
From: 506167 <sip:506167@voxalot.com>;tag=1868712778
To: <sip:600@voxalot.com>
Call-ID: 531650F8-F2EA-56D9-79D5-DC2CA4F3AB0B@192.168.0.3
CSeq: 59778 INVITE
Server: OpenSer (1.0.1 (i386/linux))
Content-Length: 0
Warning: 392 24.196.79.152:5060 "Noisy feedback tells: pid=12170 req_src_ip=209.234.77.198 req_src_port=5060 in_uri=sip:600@voxalot.com out_uri=sip:600@voxalot.com via_cnt==1"
RECEIVE TIME: 737196046
RECEIVE << 24.196.79.152:5060
SIP/2.0 100 trying -- your call is important to us
Via: SIP/2.0/UDP 209.234.77.198:5060;rport=5060;branch=z9hG4bK670D7 573AD983D3FA0A7CB42A945DA97
From: 506167 <sip:506167@voxalot.com>;tag=1868712778
To: <sip:600@voxalot.com>
Call-ID: 531650F8-F2EA-56D9-79D5-DC2CA4F3AB0B@192.168.0.3
CSeq: 59778 INVITE
Server: OpenSer (1.0.1 (i386/linux))
Content-Length: 0
Warning: 392 24.196.79.152:5060 "Noisy feedback tells: pid=12170 req_src_ip=209.234.77.198 req_src_port=5060 in_uri=sip:600@voxalot.com out_uri=sip:600@127.0.0.1:5061 via_cnt==1"
RECEIVE TIME: 737196053
RECEIVE << 24.196.79.152:5060
SIP/2.0 200 OK
Via: SIP/2.0/UDP 209.234.77.198:5060;rport=5060;branch=z9hG4bK670D7 573AD983D3FA0A7CB42A945DA97
Record-Route: <sip:24.196.79.152;ftag=1868712778;lr=on>
From: 506167 <sip:506167@voxalot.com>;tag=1868712778
To: <sip:600@voxalot.com>;tag=as304b7af9
Call-ID: 531650F8-F2EA-56D9-79D5-DC2CA4F3AB0B@192.168.0.3
CSeq: 59778 INVITE
User-Agent: VoXaLot
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY
Contact: <sip:600@24.196.79.152:5061>
Content-Type: application/sdp
Content-Length: 242
v=0
o=root 19374 19374 IN IP4 24.196.79.152
s=session
c=IN IP4 24.196.79.152
t=0 0
m=audio 14844 RTP/AVP 0 8 101
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=silenceSupp
ff - - - -
SEND TIME: 737196081
SEND >> 24.196.79.152:5060
ACK sip:600@24.196.79.152:5061 SIP/2.0
Via: SIP/2.0/UDP 209.234.77.198:5060;rport;branch=z9hG4bK24C063FA4F 5314059AFBD0DCA415B73B
From: 506167 <sip:506167@voxalot.com>;tag=1868712778
To: <sip:600@voxalot.com>;tag=as304b7af9
Contact: <sip:506167@209.234.77.198:5060>
Route: <sip:24.196.79.152;ftag=1868712778;lr=on>
Call-ID: 531650F8-F2EA-56D9-79D5-DC2CA4F3AB0B@192.168.0.3
CSeq: 59778 ACK
Max-Forwards: 70
Content-Length: 0
RECEIVE TIME: 737225224
RECEIVE << 24.196.79.152:5060
BYE sip:506167@209.234.77.198:5060 SIP/2.0
Record-Route: <sip:24.196.79.152;ftag=as304b7af9;lr=on>
Via: SIP/2.0/UDP 24.196.79.152;branch=z9hG4bKfd39.466a4cb.0
Via: SIP/2.0/UDP 24.196.79.152:5061;branch=z9hG4bK12b96f1f;rport=50 61
From: <sip:600@voxalot.com>;tag=as304b7af9
To: 506167 <sip:506167@voxalot.com>;tag=1868712778
Contact: <sip:600@24.196.79.152:5061>
Call-ID: 531650F8-F2EA-56D9-79D5-DC2CA4F3AB0B@192.168.0.3
CSeq: 102 BYE
User-Agent: VoXaLot
Max-Forwards: 69
Content-Length: 0
P-hint: rr-enforced
SEND TIME: 737225262
SEND >> 24.196.79.152:5060
SIP/2.0 200 Ok
Via: SIP/2.0/UDP 24.196.79.152;branch=z9hG4bKfd39.466a4cb.0
Via: SIP/2.0/UDP 24.196.79.152:5061;branch=z9hG4bK12b96f1f;rport=50 61
From: <sip:600@voxalot.com>;tag=as304b7af9
To: 506167 <sip:506167@voxalot.com>;tag=1868712778
Contact: <sip:506167@209.234.77.198:5060>
Call-ID: 531650F8-F2EA-56D9-79D5-DC2CA4F3AB0B@192.168.0.3
CSeq: 102 BYE
Server: X-Lite release 1105d
Content-Length: 0