Specifications

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Cisco Unified IP Phone 7906G and 7911G for Cisco Unified Communications Manager 8.0
OL-21033-01
Chapter 3 Setting Up the Cisco Unified IP Phone
Installing the Cisco Unified IP Phone
Audio Quality Subjective to User
Beyond the physical, mechanical and technical performance, the audio portion of a headset must
sound good to the user and to the party on the far end. Sound quality is subjective and Cisco cannot
guarantee the performance of any headsets. However, a variety of headsets from leading headset
manufacturers have been reported to perform well with Cisco Unified IP Phones. See manufacturer’s
sites for details.
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].
Installing the Cisco Unified IP Phone
You must connect the Cisco Unified IP Phone to the network and to a power source before using it. See
Figure 3-2, Figure 3-3, and Figure 3-4 for a graphical overview of the procedures that follow.