Specifications

Chapter A Providing Information to Users By Using a Website
How the Cisco Unified Wireless IP Phone Operates
A-2
Cisco Unified Wireless IP Phone 7921G Administration Guide for Cisco Unified CallManager Release 4.1, 4.2, 5.0
OL-10802-02
How the Cisco Unified Wireless IP Phone Operates
Users need to know that their Cisco Unified Wireless IP Phone 7921G operates
more like a cell phone than like their desktop phone. Small wireless phones with
an antenna allow users to move around a facility while staying connected to a call.
These phones, like cell phones, can approach the edge of the RF signal range and
experience static or poor voice quality. At times, the user might encounter areas
where there is no signal and lose the call entirely. The following is a list of calling
locations and situations in which wireless phones might experience audio
problems:
• Stairwells, elevators, rooms with metal equipment such as file cabinets, or
heavy machinery
• Break rooms with microwave ovens, or labs with equipment that emits RF
signals within the same ranges.
• Conference rooms or other congested areas where many people are using
wireless devices
• Parking garages and outdoor areas where access points are not located or out
of range.
Caution This product is not a medical device and may use an unlicensed frequency band
that is susceptible to interference from other devices or equipment.
The Cisco Unified Wireless IP Phone 7921G has many of the same phone features
as the IP
phone desktop models, such as Mute, access to voice messaging, and
directories. The phone has a limited number of buttons, because of its size. As a
consequence, the following are some differences in its operation:
• No line buttons—You must enter the phone number from the key pad and
press Send. You can press the Phone icon from the main screen to use other
lines on your phone.
• Only two softkeys—You must press the Options softkey to see the list of
softkey features.
• You do not hear a dial tone.