Juniper EX4400 - Page 217

NOTE: Extension modules are not part of the shipping conguraon. If you want to purchase
them, you must order them separately and register them (see "Register Products—Mandatory to
Validate SLAs" on page 145).
To install an extension module:
1. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end
of the strap to a site ESD point.
If a grounding strap is not available, hold the extension module in its anstac bag in one hand and
touch the exposed, bare metal of the switch with the other hand to ground yourself and the
component.
2. If the extension module slot has a cover on it, loosen both the screws on the cover by using your
ngers. If you are unable to unscrew the screws by using your ngers, use the screwdriver. Hold both
the screws and gently pull the cover outward, and save it for later use.
NOTE: If you are removing an extension module and installing another extension module,
wait for at least 10 seconds aer removing the extension module before installing the new or
the same extension module. If you do not wait for at least 10 seconds, the interfaces on the
extension module might not come up.
3. Taking care not to touch module components, pins, leads, or solder connecons, remove the
extension module from its bag.
CAUTION: Before you slide the extension module into the slot on the switch chassis,
ensure the extension module is aligned correctly. Misalignment might cause the pins to
bend, making the extension module unusable.
4. Using both hands, place the module in the empty slot and slide it in gently unl it is fully seated.
5. Tighten both the capve screws by using your ngers or the screwdriver (see Figure 120 on page
210, Figure 121 on page 210, and Figure 122 on page 211).
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