Panasonic KX-NS1000 Installation Manual page 328

8.3.1 IP Telephony Service
WAN
Internet
STUN STUN
STUN STUN
Server Server
ISP/ITSP ISP/ITSP
LAN
V-SIPGW16 Card
Note
•
If an ISP/ITSP uses a device such as SBC (Session Border Controller), you may not have to enable
the NAT Traversal feature.
•
A STUN Server is supplied by an ISP/ITSP, and not included with the PBX.
328 Installation Manual
SIP SIP
Server Server
Router
(NAT enabled)
Switching
PC
PBX with
Fixed IP Address Fixed IP Address
SIP SIP
Server Server
ISP/ITSP ISP/ITSP
Hub
IP-PT
Document Version 2016-03