Aastra 9143i Series Administrator's Manual page 261

How it Works
When an Administrator updates account parameters for a phone from the
configuration server (using the configuration file), the changes are compared to
the existing account parameters on the phone. If the parameters are the same, the
account information sent from the server is deleted and the account on the phone
remains unchanged. If the parameters are different, the new account information
is linked to the old account information and the old account is unregistered and the
phone unsubcribes from the subscription service. The new account is then applied
and the phone dynamically re-subscribes to the subscription services (BLF and/or
MWI supported only).
If an Administrator changes the account information via the Aastra Web UI, the IP
Phone UI, or via an XML Push, the phone checks if dynamic SIP is enabled. If
dynamic SIP is enabled, the dynamic SIP feature proceeds as described in the
previous paragraph. If it is disabled, the user is prompted to reboot the phone upon
the user saving an LCD page or leaving a menu.
An Administrator can enable or disable the Dynamic SIP feature using the
following parameter in the configuration files:
• dynamic sip
Limitations
The following are limitations of the dynamic SIP feature:
• This feature does not support the addition and deletion of accounts.
• This feature does not effect the DND and CFWD state of a line.
Enabling/Disabling the Dynamic SIP Feature
Use the following procedure to enable/disable the Dynamic SIP feature.
Configuration Files
For the specific parameter you can set in the configuration files, see Appendix A, the section,
for Registration and Subscription"
41-001160-03 Rev 00, Release 2.5
Configuring Network and Session Initiation Protocol (SIP) Features
Note: The dynamic SIP feature performs without having to reboot the
phone.
on page A-76.
Global SIP Settings
"Dynamic SIP
4-77