Operation Manual

COMfortel 1400IP/2600IP/3600IP - Firmware V2.2G - Operation and Configuration V03 07/2015 471
Settings
Providers and PBXs
Configuring NAT Traversal
– 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. Tap on Apps > Settings > Providers & PBXs.
2. Tap on the name of the provider/PBX.
3. Under NAT, tap on NAT.
4. Tap on SIP NAT traversal.
5. In the SIP NAT traversal list field, 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).
6. Tap on RTP NAT traversal.
7. In the RTP NAT traversal list field, select one of the following options:
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 go to Settings and enter the name of a STUN 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 do
this, you must also specify a STUN server.