Power Supply Module - Cisco uBR-3x10 Hardware Installation And Cabling Manual

Hardware Component Descriptions
OIR Feature
The OIR feature allows you to remove an Ethernet controller or an upstream or downstream module and
replace it with another identically configured one. If the new controller or module matches the controller
or module you removed, the system immediately brings it online. To allow OIR, an address allocator
with a unique MAC address is stored in an EEPROM on the Cisco RF switch midplane. Each address is
reserved for a specific port and slot in the switch, regardless of whether an Ethernet controller or an
upstream or downstream switch module resides in that slot.
Slot MAC Addresses
The MAC addresses are assigned to the slots in sequence. The first address is assigned to Ethernet
controller slot 0, and the next addresses are assigned to upstream and downstream card slots 1 through
14 (refer to the
information). This address scheme allows you to remove the Ethernet controllers or upstream and
downstream cards and insert them into other switches without causing the MAC addresses to move
around the network or be assigned to multiple devices.
Hardware Component Descriptions
The following components are included in the Cisco uBR 3x10 RF Switch chassis:
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Power Supply Module

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The power supply module takes 100 to 240 VAC input and provides +12 VDC output. It also takes
-40.5 to -72 VDC input and supplies +12 VDC output.
A control switch on the front panel is used to select DC input or AC input operation. This a 20-W power
supply.
Caution When inserting or removing the power supply from the Cisco uBR 3x10 RF Switch chassis, you must
use a screwdriver to tighten and loosen the captive installation screws.
Cisco uBR-3x10 RF Switch Hardware Installation and Cabling Guide
1-4
"Cisco uBR 3x10 RF Switch Slot Information" section on page 6-7
Power supply module
Ethernet controller module
Upstream (low-frequency) switch modules
Downstream (high-frequency) switch modules
Cisco part number 74-2624-01 (see
Chapter 1
Figure 1-3 on page 1-5).
Cisco uBR-3x10 RF Switch Overview
for slot location
OL-1984-06