Depending on the quality of these devices and their proximity to other devices, such as mobile phones or
two-way radios, some audio noise may still occur. In these cases, Cisco recommends that you take one or
more of the following actions:
•
Move the external device away from the source of the RF or AF signals.
•
Route the external device cables away from the source of the RF or AF signals.
•
Use shielded cables for the external device, or use cables with a better shield and connector.
•
Shorten the length of the external device cable.
•
Apply ferrites or other such devices on the cables for the external device.
Cisco cannot guarantee the performance of the system because Cisco has no control over the quality of external
devices, cables, and connectors. The system performs adequately when suitable devices are attached with
good quality cables and connectors.
In European Union countries, use only external headsets that are fully compliant with the EMC Directive
[89/336/EC].
Caution
Install Cisco Unified IP Phone
You must connect the Cisco Unified IP Phone to the network and to a power source before using it. For
information on connecting the phone, see the figures in Cisco Unified IP Phone 8961, 9951, and 9971, on
page 2.
Before you install a phone, even if it is new, upgrade the phone to the current firmware image.
Before using external devices, read External device use, on page 65 for safety and performance information.
Note
Firmware upgrades over the WLAN interface may take longer than upgrading over the wired interface,
depending on the quality and bandwidth of the wireless connection. Some upgrades may take more than
hour.
Note
To install a Cisco Unified IP Phone, perform the tasks described in the following steps.
Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager
10.0 (SIP)
66
Cisco Unified IP Phone Installation
Install Cisco Unified IP Phone
REVIEW DRAFT - CISCO CONFIDENTIAL
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