Aastra 9143i Series Administrator's Manual page 176

IP Phone Administrator Guide
Administrator Level Options
Parameter
Parameter in
In
Aastra Web UI
IP Phone UI
N/A N/A
3-86
Parameters in
Configuration Files
sips persistent tls
Description
Enables or disables the use of Persistent
Transport Layer Security (TLS).
Persistent TLS sets up the connection to the
server once and re-uses that connection for all
calls from the phone. The setup connection for
Persistent TLS is established during the
registration of the phone. If the phones are set
to use Persistent TLS, and a call is made from
the phone, this call and all subsequent calls
use the same authenticated connection. This
significantly reduces the delay time when
placing a call.
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.
For more information, see Chapter 6, the
section, "Transport Layer Security (TLS)"
page 6-26.
41-001160-03, Rev 00, Releaes 2.4
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