Hello!
I'm using SPA8000 with firmware 6.1.10(001). SPA connected via linux box with symmetric nat.
It's work fine with standalone line. But if trunk used (with NAT support) - all IP replaced by 127.0.0.1
INVITE sip:xxx@xxx SIP/2.0
Via: SIP/2.0/UDP 127.0.0.1:5060;branch=z9hG4bK-2525c8c7;rport
From: xxx <sip:xxx@xxx>;tag=54afb7322d3d1aco2;ref=1
To: <sip:xxx@xxx>
Remote-Party-ID: xxx <sip:xxx@xxx>;screen=yes;party=calling
Call-ID: 2b8d083f-59564b50@xxx
CSeq: 101 INVITE
Max-Forwards: 70
Contact: xxx <sip:xxx@127.0.0.1:5060>
Expires: 240
User-Agent: Linksys/SPA8000-6.1.10(001)
Allow-Events: talk, hold, conference
Content-Length: 432
Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER
Supported: x-sipura, replaces
Content-Type: application/sdp
v=0
o=- 7170 7170 IN IP4 127.0.0.1
s=-
c=IN IP4 127.0.0.1
t=0 0
"External IP" from status page is 192.168.19.230 if no lines added to trunk and 127.0.0.1 if one or more lines added to trunk.