Aastra SIP 53I Administrator's Manual page 571

Configuration Parameters
Operational, Basic, and Advanced Parameters
Parameter –
sip acd subscription period
ACD Subscription Period
(in Web UI)
Description
Format
Default Value
Range
Example
41-001160-00, Release 2.1, Rev 04
Aastra Web UI
Configuration Files
Specifies the time period, in seconds, that the IP phone resubscribes the
Automatic Call Distribution (ACD) subscription service after a software/
firmware upgrade or after a reboot of the IP phone.
Integer
3600
120 (2 minutes is the minimum value)
sip acd subscription period: 2000
Advanced Settings->Global SIP
->Advanced SIP Settings
aastra.cfg, <mac>.cfg
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