<-- SIP read from 192.168.1.50:5060:
SUBSCRIBE sip:250@192.168.1.90 SIP/2.0
Via: SIP/2.0/UDP 192.168.1.50:5060;branch=z9hG4bK-1cc6d1c5
From: "250" <sip:250@192.168.1.90>;tag=4848aed1483b6b7f
To: "250" <sip:250@192.168.1.90>
Call-ID: 8b41abb2-c508fec2@192.168.1.50
CSeq: 1001 SUBSCRIBE
Max-Forwards: 70
Contact: "250" <sip:250@192.168.1.50:5060>
Expires: 60
Event: call-info
User-Agent: Sipura/SPA941-4.1.8
Content-Length: 0


--- (12 headers 0 lines)---
Using latest SUBSCRIBE request as basis request
Found user '250'
Looking for 250 in subscriptions (domain 192.168.1.90)
Transmitting (NAT) to 192.168.1.50:5060:
SIP/2.0 404 Not Found
Via: SIP/2.0/UDP 192.168.1.50:5060;branch=z9hG4bK-1cc6d1c5;received=192.168.1.50
From: "250" <sip:250@192.168.1.90>;tag=4848aed1483b6b7f
To: "250" <sip:250@192.168.1.90>;tag=as1c18b87c
Call-ID: 8b41abb2-c508fec2@192.168.1.50
CSeq: 1001 SUBSCRIBE
User-Agent: Asterisk PBX
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY
Contact: <sip:250@192.168.1.90>
Content-Length: 0