Preparing for Installa tion 2-9
Removing Dial Shelf Cards and Dial Shelf Controller Cards
To remove the dial shelf card s and dial shelf cont roller cards, follow th ese steps:
Caution Trunk cards and modem cards weigh 8 lb (3.3 kg) each. Dial shelf controller cards weigh
8.5 lb (3.8 kg) each. Use two hands when removing or replacing cards in the dial shelf.
Step1 Record the original position of each card before you remove the cards from the d ial shel f
slots. Refer to this information when you reinstall the cards.
Step2 Attach an ESD-preventive wrist strap between you and an unpainted chassis s urface.
Caution To prevent ESD damage, handle trunk cards by ejector levers and carrier edges only, and
use an ESD-preventive wrist strap or other grounding de vice.
Step3 Using a No. 2 Phillips screwdriver, loosen the panel fast eners at the top and bot tom of the
card front panel.
Step4 Pull either the upper or lower ejector lever away from the card front panel to disengage
the card from the backplane connector. (See Figure2-5.)
Caution Always use the ejector levers when disengaging or seating trunk cards, modem card s, or
dial shelf controller cards in the dial shelf backplane. Failure to do so can caus e erro neous system
error messages indicating a card failure. However, do not use the ejector levers t o lift or support the
weight of the cards.
Figure2-5 Using the Ejector Levers
Step5 Grasp the ejector levers and pull the card partially out of the dial shelf slot until you can
grasp the card front panel with one hand. Place y our other hand unde r t he ca rd to balance
the weight of the card as you pull it out of the slot. (See Figure2-6.)
PWR
E1FR
HCPU
MAINT
T1FR
FCPU
RALM
LALM
MONITOR#
NLOOP
75
PWR
E1FR
HCPU
MAINT
T1FR
FCPU
RALM
LALM
0
MONITOR#
NLOOP
75
PWR
HCPU
CALLS
MAINT
MODEMS
H11097
PWR
E1FR
HCPU
MAINT
T1FR
FCPU
PWR
E1FR
HCPU
MAINT
T1FR
FCPU
Panel fastener