Hardware Update; Preparations - Aastra 470 System Manual

6. 3

Hardware update

Hardware maintenance comprises replacing cards and modules when there is a de-
fect or for a generation change. Safety regulations must be observed and the step-
by-step procedure must be followed.
6. 3. 1

Preparations

The following preliminary steps apply to interface cards, system cards and system
modules as well as to the call manager card of the communication server itself. The
preliminary steps for replacing an applications card are described separately.
First steps before cards are removed or added:
1. Inform users
2. Prebar the system
3. Shutting down the call manager
Inform users
Inform all concerned users if the system has to be put out of operation during
working time.
Tip
To inform users, use the internal messaging system on the system
phones.
Prebar the system
Prebarring the system prevents setting up new connections. Ongoing calls are not
cleared down. If a user tries to set up a call while prebarring is activated, he will ob-
tain no dialling tone and the system phone display will read
The system is prebarred in the AMS Configuration Manager or in the Fault & Main-
tenance Manager under
tively the system can also be prebarred via the display and control panel.
The colour display on the front panel shows when the system is prebarred (see
Tab. 101).
Aastra Intelligent Net:
In an AIN every node can be individually prebarred and unlocked again.
As soon as there are no more active connections in the prebarred system, the call
manager can be shut down.
Aastra 470 ab R3.0
syd-0337/1.5 – R3.0 – 05.2013
Slot configuration: press the
Operation and Maintenance
Not available
Prebar system button. Alterna-
221