User's Manual

78-18795-01

Using External Devices

The following information applies when you use external devices with the

Cisco Unified Wireless IP Phone.

Cisco recommends the use of good quality external devices (such as headsets)

that are shielded 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:

• Mo

ve 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.

• U

se shielded cables for the external device, or use cables with a better

hield and connector.

• Shorten the length of the external device cable.

• Apply ferrites or other such devices on the cables for the external device.

isco cannot guarantee the performance of the system because Cisco has no

cont

rol 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.