Operation Manual

COMfortel 1400IP/2600IP/3600IP - Firmware V2.2G - Operation and Configuration V03 07/2015 469
Settings
Providers and PBXs
Configuring NAT Traversal
5. Configure the settings you want:
• PBX account: Under Security, tap on Fingerprint for SIPS certificate. Enter the
fingerprint in the entry field, and then tap on OK.
Note: If you have saved a root certificate for encrypting calls in your PBX, this
is uploaded automatically to the telephone. You must enter the root certificate
fingerprint in the telephone so that the root certificate can be verified.
• SIP account: Under Security, tap on Certificate and then tap on the certificate
name under Install certificates from SD card.
Note: To delete the certificate, tap on Delete certificate under Manage
certificates.
Configuring NAT Traversal
NAT (Network Address Translation) enables you to convert a particular IP address that is used
within a network (e.g. a local network) into a different IP address that can be used by a different
network (e.g. the public switched telephone network). If NAT traversal is switched on and a
query is sent from a local IP address to the public network, the sending IP address is swapped
with the public IP address. This function is performed in the reverse direction for the reply.
Important: Every port opening on the NAT router is a security risk. Apply the
appropriate security measures.
You can configure NAT traversal as follows:
• Separately for the provider or PBX
• Using the configuration manager
• Using the telephone
Using the Configuration Manager to Configure NAT Traversal
Requirements:
Switches SIPS on.
Switches SIPS off. (No further action is required.)