Cisco Ip Phone 7800 Series Administration Guide For Cisco Unified Communications Manager - Cisco 7800 series Administrator's Manual

• 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 external devices, cables, and connectors.
In European Union countries, use only external speakers, microphones, and headsets that are fully compliant
Caution
with the EMC Directive [89/336/EC].

Cisco IP Phone 7800 Series Administration Guide for Cisco Unified Communications Manager

External Devices
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