Operation Manual

470 COMfortel 1400IP/2600IP/3600IP - Firmware V2.2G - Operation and Configuration V03 07/2015
Settings
Providers and PBXs
Configuring NAT Traversal
– Set DNS server
– STUN server set up for the provider/PBX, if the Enabled with STUN option has been
selected
– If the checked option has been selected: the registrar enabled for the provider/PBX
1. Open the Settings > Providers & PBXs screen.
2. In the line that contains the provider/PBX, click Configure.
The provider/PBX configuration screen opens.
3. Click on the NAT tab.
4. Under SIP NAT-Traversal, select one of the following options:
Note: If Enabled is selected: if there are problems with unilateral call connec-
tions, a STUN server should be used (activated when you are using
STUN).
5. Under RTP NAT-Traversal, select one of the following options:
Further steps:
– Save your settings before you leave the screen.
Using the Telephone to Configure NAT Traversal
Requirements:
– Set DNS server
Enabled: NAT traversal is performed by the provider/PBX. The SIP request
also contains an "rport" part in which the IP addresses used here (local, public)
are transported.
Disabled: NAT traversal is not performed by the provider/PBX. The router,
which connects the Local Area Network with the Internet, should be a properly
functioning, SIP-aware router which performs NAT traversal.
Enabled with STUN: NAT traversal is performed by the provider/PBX. To
achieve this, you must also enter a STUN server under Settings.
Disabled: NAT traversal is not performed by the provider/PBX. The router,
which connects the Local Area Network with the Internet, should be a properly
functioning, SIP-aware router which performs NAT traversal.
Enabled with STUN: NAT traversal is performed by the provider/PBX. To do
this, you must also specify a STUN server.