Aastra Telecom 53I - Manual (Page 34)

Security Features
28 RN-001029-00, Rev 03, Release 2.1
IP Phone Release Notes 2.1
Parameter –
sips root and intermediate
certificates
Root and Intermediate
Certificates
(in Web UI)
Aastra Web UI Advanced Settings->TLS Support
Configuration Files aastra.cfg, <mac>.cfg
Description Allows you to specify the SIP Root and Intermediate Certificate files to use
when the phone uses the TLS transport protocol to setup a call.
The Root and Intermediate Certificate files contain one root certificate and
zero or more intermediate certificates which must be placed in order of
certificate signing with root certificate being the first in the file. If the local
certificate is signed by some well known certificate authority, then that
authority provides the user with the Root and Intermediate Certificate files
(most likely just CA root certificate).
This parameter is required when configuring TLS (optional for Persistent
TLS.)
Note: The certificate files must use the format “.pem”. To create custom
certificate files to use on your IP phone, contact Aastra Technical Support.
Format <file name>.pem
Default Value N/A
Range N/A
Example sips root and intermediate certificates: cacert_openser.pem