1.1 Information about IP Telephony Service
WAN
Internet
STUN
STUN
STUN
STUN
STUN
STUN
Server
Server
Server
ISP/ITSP
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.
6
Programming Manual for Virtual SIP CO Line Card
SIP
SIP
SIP
Server
Server
Server
Router
(NAT enabled)
Switching
PC
PBX with
Fixed IP Address
Fixed IP Address
Fixed IP Address
SIP
SIP
SIP
Server
Server
Server
ISP/ITSP
ISP/ITSP
ISP/ITSP
Hub
IP-PT
Document Version 2008-11