Aastra-telecom 53I User Manual download pdf (Page 31)

Security Features

RN-001029-00, Rev 03, Release 2.1 25

5i Series IP Phone Release Notes

On the IP phones, an Administrator can configure TLS and Persistent TLS on a

global-basis only, using the configuration files or the Aastra Web UI.

Notes:

1. Persistent TLS requires the outbound proxy server and outbound

proxy port parameters be configured in either the configuration files or

the Aastra Web UI (Advanced Settings->Global SIP->Basic SIP Network

Settings). There can be only one persistent TLS connection created per

phone. The phone establishes the TLS connection to the configured

outbound proxy.

2. If you configure the phone to use Persistent TLS, you must also

specify the Trusted Certificate file to use. The Root and Intermediate

Certificates, Local Certificate, and Private Key files are optional.

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Aastra-telecom 53I User Manual Page 31