Cisco 8831NR Administration Manual page 59

Cisco Unified IP Conference Phone Installation
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Connect Mini-USB Cable to DCU
The following images show how to install the USB cable.
Procedure
Step 1 Insert the mini-USB connector into the port on the base of the phone.
Step 2
Seat the ferrite bead between the posts and press the bead down firmly.
Step 3 Thread the cable in the cable channel. Make sure that you leave some slack in the cable.
Install Ferrite Bead on Network Cable
The following images show how to install the ferrite bead on the network cable.
Item
Wall power
Mini USB port
Wired microphone ports
Linked Mode daisy chain port
Cisco Unified IP Conference Phone 8831 and 8831NR Administration Guide
Connect Mini-USB Cable to DCU
Description
Local power connection.
Connects the base station to the DCU.
Attention When connecting the USB cable, firmly press
down on the ferrite bead to ensure it seats
correctly between the posts.
Two RJ11 microphone ports. An optional wired
microphone can be connected to each port.
Supports the connection of two base stations in Linked
Mode.
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