Operation and Maintenance
226
Aastra 470 ab R3.0
syd-0337/1.5 – R3.0 – 05.2013
6. 3. 4 System modules
The category system modules comprises the modules expandable as an option
(DSP modules, IP media modules, call charge modules) and the mandatory mod-
ules (RAM module).
6. 3. 4. 1 Change the DSP module
DSP modules are available in various versions (SM-DSPX1, SM-DSPX2, SM-DSP1,
SM-DSP2). Compared with DSP modules, modules with the designation DSPX are
fitted with more powerful DSP chips. The following describes how to replace a DSP
module if it is defective or how to replace it for a more powerful module. DSP mod-
ules are fitted to the call manager card.
To change a DSP module, proceed as follows:
Warning
Be sure to observe the "Safety regulations", page 95.
1. Carry out preparations (see "Preparations", page 221).
2. Unscrew the screw on the Call Manager card and remove the card by pulling the
fastening screw.
3. Remove the old or defective module by loosening the fastening screw and care-
fully pulling the module out vertically of the module slot.
Note:
If multiple modules are equipped and the defective card is not top-
most, the spacing sleeves have to be loosened and the modules
pulled. The order of the modules on the slot is relevant only if different
types of modules are equipped.
4. Press the new module downward evenly on both connectors to the stop.
5. Secure the module with the fastening screw.
6. Carefully push back the call manager card into the shaft and gently press the
card as far as it goes into the connection on the backplane.
7. Secure the Call Manager card back into its slot with the screw.
8. Restart the call manager by pressing the On/Off button on the call manager
card.
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