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Cisco Unified IP Phone 7906G and 7911G Administration Guide for Cisco Unified CallManager 5.1
OL-11515-01
Chapter 3 Setting Up the Cisco Unified IP Phone
Understanding the Cisco Unified IP Phone 7906G and 7911G Components
Connecting a Headset
To connect a headset to the Cisco Unified IP Phone, plug it into the RJ-9 Handset
port on the back of the phone. Depending on headset manufacturer’s
recommendations, an external amplifier may be required. Refer to headset
manufacturer's product documentation for details.
You can use the headset with all of the features on the Cisco Unified IP Phone,
including using the Volume button.
Using External Devices with Your Cisco Unified IP Phone
The following information applies when you use external devices with the
Cisco
Unified IP Phone:
Cisco recommends the use of good quality external devices (headsets) that are
shielded (screened) against unwanted radio frequency (RF) and audio frequency
(AF) signals.
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
will perform adequately when suitable devices are attached using good quality
cables and connectors.
Caution In European Union countries, use only external headsets that are fully compliant
with the EMC Directive [89/336/EC].
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