Bluetooth; Coexistence (802.11B/G + Bluetooth) - Cisco 7925G Deployment Manual

802.11b
Max Tx Power is 17 dBm
Note: Receiver sensitivity is the minimum signal needed to decode a packet at a certain data rate.
See the "Designing the Wireless LAN for

Bluetooth

The Cisco Unified Wireless IP Phone 7925G supports Bluetooth Class 2 technology allowing for wireless headset
communications. Bluetooth enables low bandwidth wireless connections within a range of 30 feet, however it is recommended
to keep the Bluetooth device within 10 feet of the phone.
You can connect up to five headsets, but only the last one connected is used as the default.
The Bluetooth device does not need to be within direct line-of-sight of the phone, but barriers, such as walls, doors, etc. can
potentially impact the quality.
Bluetooth utilizes the 2.4 GHz frequency just like 802.11b/g and many other devices (i.e. microwave ovens, cordless phones,
etc.), so the Bluetooth quality can potentially be interfered with due to using this unlicensed frequency.

Coexistence (802.11b/g + Bluetooth)

If using Coexistence where 802.11b/g and Bluetooth are used simultaneously, then there are some limitations and deployment
requirements to be considered as they both utilize the 2.4 GHz frequency.
Capacity
•
When using Coexistence (802.11b/g + Bluetooth), call capacity is reduced due to the utilization of CTS to
protect the 802.11g and Bluetooth transmissions.
Multicast Audio
•
Multicast audio from Push To Talk (PTT), Music on Hold (MMOH) and other applications are not supported
when using Coexistence.
Data Rate Configuration
Cisco Unified Wireless IP Phone 7925G Deployment Guide
9 Mbps
12 Mbps
18 Mbps
24 Mbps
36 Mbps
48 Mbps
54 Mbps
Data Rate
1 Mbps
2 Mbps
5.5 Mbps
11 Mbps
Voice" section for more information on signal requirements.
650 ft (198 m)
623 ft (190 m)
623 ft (190 m)
623 ft (190 m)
495 ft (151 m)
413 ft (126 m)
394 ft (120 m)
Range
1,010 ft (308 m)
951 ft (290 m)
919 ft (280 m)
902 ft (275 m)
-90 dBm
-87 dBm
-86 dBm
-82 dBm
-80 dBm
-77 dBm
-76 dBm
Receiver Sensitivity
-96 dBm
-85 dBm
-90 dBm
-87 dBm
11