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Chapter 4 Installation
20 Avaya P334T-ML User’s Guide
Installing the X330STK-ML Stacking Sub-Module (Optional)
Caution: The stacking sub-modules contain components sensitive to electrostatic
discharge. Do not touch the circuit board unless instructed to do so.
To install the stacking sub-module in the P334T-ML:
1 Remove the blanking plate from the back of the P334T-ML switch.
2 Insert the stacking sub-module gently into the slot, ensuring that the metal base
plate is aligned with the guide rails. The metal plate of the X330STK-ML (and
not the PCB) fits onto the guide rails.
3 Press the sub-module in firmly until it is completely inserted into the
P334T-ML.
4 Gently turn the two screws on the side panel of the stacking sub-module until
they are secure.
L The P334T-ML must not be operated with the back-slot open. The stacking sub-
module should be covered with the supplied blanking plate if necessary.
L Only use the X330STK-ML stacking module with the P334T-ML.
Connecting Stacked Switches
L The two ends of the Octaplane cable terminate with different connectors. Each
connector can only be connected to its matching port.
You can use the following cables to connect stacked switches:
• Short Octaplane cable (X330SC) – ivory-colored, used to connect adjacent
switches (Catalog No. CB0223) or switches separated by a BUPS unit.
• Long/Extra Long Octaplane cable (X330LC/X330L-LC) – ivory-colored, used to
connect switches from two different physical stacks, or switches separated by a
BUPS unit (Catalog No. CB0225/CB0270).
• Redundant/Long Redundant Octaplane cable (X330RC/X330L-RC) – black,
used to connect the top and bottom switches of a stack (Catalog No. CB0222/
CB0269).
These are the same cables that are used with all the P330 switches.
To connect stacked switches:
L When adding a module to an existing stack, first connect the stacking cables and
then power up the module.
1 Plug the light grey connector of the Short Octaplane cable into the port marked
“to upper unit” of the bottom P330 switch.
2 Plug dark grey connector of same Short Octaplane cable to the port marked “to
lower unit” in the unit above. The connections are illustrated in Figure 4.3.
3 Repeat Steps 1 and 2 until you reach the top switch in the stack.