Aastra 470, System Manual, Page: 188 / 250

Operation and Maintenance
188
Aastra 470 as of R1.2
syd-0337/1.2 – R1.2 – 11.2011
6. 3. 4. 3 Replacing the call charge module
Call charge modules are fitted to FXO trunk cards.
To replace a defective call charge module on an FXO trunk card, proceed as follows:
Warning
Be sure to observe the "Safety regulations", page 77 .
1. Carry out preparations (see "Preparations", page 182 ).
2. Unscrew the screw on the FXO card and remove the card by pulling the fasten-
ing screw.
3. Remove the defective module by loosening the fastening screw and carefully
pulling the module out vertically of the module slot.
4. Place the new module in the slot and press it down evenly into the slot as far as
the stop.
5. Secure the module with the fastening screw on the spacer sleeve.
6. Carefully slide the FXO card into the slot shaft and gently press the card as far as
it goes into the connection on the backplane.
7. Use the screw to secure the FXO card back into its slot.
8. Restart the call manager by pressing the On/Off button on the call manager
card.
6. 3. 4. 4 Changing the RAM module
The RAM module is fitted to the call manager card; in the event of a fault it is re-
placed together with the call manager card.
6. 3. 5 System cards
The category system cards comprises the EIM card and the Flash card.
6. 3. 5. 1 Replacing the EIM card
The EIM card is located in a chip-card holder that is secured directly on the call
manager card. The position of the chip-card holder on the call manager card is
shown in
Fig. 76 .
To fit an EIM card, proceed as follows: