Aastra Telecom 41-001343-02 사용자 설명서

41-001343-02 REV04 – 05.2014

To configure TLS, you must enter the “sip transport protocol” parameter with a value of “4” (TLS). See the “sip transport 
protocol” description on 

Also enter the following parameters in the configuration files to configure TLS:

Parameter – 
sips persistent tls

Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg

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:
• There can be only one persistent TLS connection created per phone. 
• If you configure the phone to use Persistent TLS, you must also specify the Trusted Cer-

tificate file to use. The Root and Intermediate Certificates, Local Certificate, and Private 
Key files are optional.

Boolean

0 (disabled)

0 (disabled)
1 (enabled)

sips persistent tls: 1

Parameter – 
sip persistent tls keep alive 

Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg

When enabled, the configured value indicates frequency (in seconds) that phone will 
send the keep alive messages.

Integer

0 (Disabled)

0-3600

sip persistent tls keep alive: 10 

Parameter– 
sip send sips over tls

Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg

Allows administrators the ability to manually configure the IP phones to use either the SIP 
or SIPS URI scheme when TLS or persistent TLS is enabled

Integer

1 (Enabled)

0-1
0 (Disabled - Use SIP URI scheme)
1 (Enabled - Use SIPS URI scheme)

sip send sips over tls: 0