P/N 480-0005-00-15
8-14
Chapter 8: Diagnostics/Maintenance
Replace WAN/System Controller/CPU cards of identical type
The unit continually monitors all the cards for proper functioning. Any errors are reported through the associ-
ated LEDs or an alarm. The alarm may indicate that the board is healthy but one of the lines is not functioning
properly.
See below for card descriptions:
If the alarm indicates that a card has failed, and needs to be replaced, replace as follows:
1. Turn the system off via power switch on the front of the unit.
2. Install the ESD Ground Strap on your wrist (See
Chapter 3: Installation
for more information).
3. Loosen the handle anchoring screws with a #1 Phillips screwdriver (there is one screw in each handle).
4. With a thumb on both top and bottom inserter/extractor handles, gently pull the handles away from the unit
to the open position until you feel the card release (see Figure 8-1).
5. Use both hands to slide the card from the chassis. See Figure 8-1. Place the card in an antistatic bag and
seal it.
T1 WAN
T1 WAN Interface
CMS (14 slot) Rec-
ommend Slot 1-4/
chassis front
Matching T1 WAN and T1 WAN Interface
cards are installed in the same slot number in
front and rear when shipped from factory.
T1 WAN Interface cards must only be
matched with Front Application T1 WAN
cards and no other type of Front Application
card.
DS1
DS1
CMS (14 slot) Slots
1-13/chassis front.
Recommend Slot 10-
13/chassis front
CMS 2 slot: slot
unoccupied by CPU.
CMS 8 slot: Start at
top slot (slot 8) and
occupy all slots until
slot 5.
The Rear Transition Module is half the size of
the Front Application card; it must be installed
directly behind the DS1 application card in the
same slot in chassis front and chassis rear.
DS1 RTM cards must only be matched with
Front Application DS1 WAN cards and no
other type of Front Application Card.
Card/
Overlay
Label
Rear Transition
Module/Overlay
Label
Slot Installation
Special Instructions
