System reboot and restart

A global download action is started when periodic maintenance tests start after a system reboot and restart regardless of whether the parameters have been downloaded previously.

Periodic tests

If the download flag is still set when periodic tests are run on a terminal, a download action will occur. This operation is required in case a terminal could not be downloaded previously either:

• Because it was off-hook at the time the system first booted.

• Because the terminal was off-hook at the time translation associated with downloadable parameters was changed.

  Note:

  It may take more than 1 hour for periodic tests to reach the terminal that needs to be downloaded.

Terminal administration

A downloadable terminal is automatically downloaded when translation changes associated with downloadable parameters are made as part of system administration. As shown in the table, these changes can be for a specified terminal or may be system-wide. If the change is for system-level parameter, a background global update request is made to download all programmable terminals.

This global update may take more than an hour for a system with several thousand programmable terminals.

Port insertion

Whenever maintenance software initiates a request to place a port into service, a terminal download action is started on that terminal if that terminal is programmable. This port insertion action occurs under the following circumstances:

• A digital line media module that is physically inserted into the system has ports currently administered for programmable terminals.

If more than 20 port insertion requests are received within a few seconds, a global download request is started up as a background task. This action updates all programmable terminals instead of just those being inserted. This is done to avoid system overload for situations where there is massive board insertion. This could occur when connectivity to an PN is reestablished after that PN was down.

• A station port is added to the system by add station or change station.

• A TTI port is activated.

Audits

As part of periodic maintenance, the hardware status audit test queries programmable terminals to determine what levels or options are used. If the reported values are not equal to the administered values, the system will initiate a terminal download action. This audit does not check the parameters used for soft keys.

Activation of TTI

A terminal is downloaded automatically when it is activated using the Terminal Translation Initialization (TTI) feature. Therefore no special user actions are required for TTI.