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Advanced Operational Parameters
41-001343-02 REV04 – 05.2014 A-210
Symmetric UDP Signaling Setting
Symmetric TLS Signaling Setting
User-Agent Setting
Parameter –
sip symmetric udp signaling
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description Allows you to enable or disable the phone to use port 5060 to send SIP UDP messages.
The value “1” (which is the default) enables the phone to use port 5060. The value “0”
(zero) disables the phone from using port 5060 and allows the phone to choose a ran-
dom port to send SIP UDP messages.
Note:
This parameter should be disabled according to M5T.
Format Boolean
Default Value 1 (enabled)
Range 0 (disabled)
1 (enabled)
Example sip symmetric udp signaling: 0
Parameter –
sips symmetric tls signaling
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description Allows you to enable or disable the phone to use port 5061 as the persistent TLS con-
nection source port. The value “1” (default) enables the phone to use port 5061. The
value “0” disables the phone from using port 5061 and allows the phone to choose a
random persistent TLS connection source port from the TCP range (i.e. 49152...65535)
regardless of whether the parameter “sip outbound support” is enabled or disabled.
Format Boolean
Default Value 1 (enabled)
Range 0 (disabled)
1 (enabled)
Example sips symmetric tls signaling: 0
Parameter –
sip user-agent
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description Allows you to enable or disable the addition of the User-Agent and Server SIP headers
in the SIP stack.
The value of “0” prevents the UserAgent and Server SIP header from being added to
the SIP stack. The value of “1” allows these headers to be added.
Format Boolean
Default Value 1 (true)
Range 0 (false)
1 (true)
Example sip user-agent: 0