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Operational, Basic, and Advanced Parameters
41-001343-02 REV04 – 05.2014 A-82
Advanced SIP Settings
Parameter –
sip explicit mwi subscription
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description If the IP phone has a message waiting subscription with the Service Provider, a Mes-
sage Waiting Indicator (MWI) (LED or display icon) tells the user there is a message on
the IP Phone. You can enable and disable MWI by setting this parameter to the follow-
ing:
"0" to disable
"1" to enable
Format Boolean
Default Value 0
Range 0 (disable)
1 (enable)
Example sip explicit mwi subscription: 1
Parameter –
sip explicit mwi subscription period
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description The requested duration, in seconds, before the MWI subscription times out. The
phone re-subscribes to MWI before the subscription period ends.
Format Integer
Default Value 86400
Range 30 - 2147483647
Example sip explicit mwi subscription period: 30
Parameter –
sip send mac
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description Adds an "Aastra-Mac:" header to the SIP REGISTER messages sent from the phone to
the call server, where the value is the MAC address of the phone.
Format Boolean
Default Value 0 (disabled)
Range 0 (disabled)
1 (enabled)
Example sip send mac: 1
Parameter –
sip send line
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description Adds an "Aastra-Line:" header to the SIP REGISTER messages sent from the phone to
the call server, where the value is the line number that is being registered.
Format Boolean
Default Value 0 (disabled)
Range 0 (disabled)
1 (enabled)
Example sip send line: 1