The SIP-GW4 card may require the NAT Traversal feature to be enabled to connect to the WAN via a router.
The following diagram illustrates how VoIP communication is enabled between the SIP-GW4 card and the SIP
Server (SIP Receiver) via a router with NAT enabled.
LAN
WAN
Internet
STUN
STUN
STUN
STUN
Server
Server
SIP
SIP
Server
Server
Fixed IP Address
Fixed IP Address
SIP
SIP
Server
Server
STUN
STUN
Server
SIP
Server
Fixed IP Address
SIP
Server
ISP/ITSP
ISP/ITSP
ISP/ITSP
ISP/ITSP
ISP/ITSP
ISP/ITSP
Router
(NAT enabled)
PC
IP-PT
Switching
Hub
PC
(Exclusively for maintenance
of the SIP-GW4 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.
Document Version 2008-10
Installation Manual
9
1.1 Information about IP Telephony Service
Summary of Contents for KX-TDA5450
Page 4: ...4 Installation Manual Document Version 2008 10 Table of Contents ...
Page 5: ...Section 1 Overview Document Version 2008 10 Installation Manual 5 ...
Page 21: ...Section 3 Programming the SIP GW4 Card Document Version 2008 10 Installation Manual 21 ...
Page 72: ...5 Click Save 72 Installation Manual Document Version 2008 10 3 7 6 Firmware Upgrade ...
Page 74: ...74 Installation Manual Document Version 2008 10 3 8 1 Reboot ...
Page 75: ...Section 4 Programming the PBX Document Version 2008 10 Installation Manual 75 ...
Page 77: ...Appendix A Guidance for VoIP Installation Document Version 2008 10 Installation Manual 77 ...
Page 80: ...80 Installation Manual Document Version 2008 10 A 1 2 Bandwidth Requirements ...
Page 81: ...Appendix B Initialization of the SIP GW4 Card Document Version 2008 10 Installation Manual 81 ...
Page 83: ...Index Document Version 2008 10 Installation Manual 83 ...