Specifications

Cisco Unified Wireless IP Phone 7921G Series Deployment Guide 13
48 Mbps
328 ft (100 m)
-76 dBm
54 Mbps
295 ft (90 m)
-74 dBm
802.11g
Data Rate
Range
Receiver Sensitivity
Max Tx Power is 16 dBm
6 Mbps
722 ft (220 m)
-90 dBm
9 Mbps
656 ft (200 m)
-89 dBm
12 Mbps
623 ft (190 m)
-87 dBm
18 Mbps
623 ft (190 m)
-85 dBm
24 Mbps
623 ft (190 m)
-82 dBm
36 Mbps
492 ft (150 m)
-78 dBm
48 Mbps
410 ft (125 m)
-74 dBm
54 Mbps
394 ft (120 m)
-73 dBm
802.11b
Data Rate
Range
Receiver Sensitivity
Max Tx Power is 17 dBm
1 Mbps
1,027 ft (313 m)
-95 dBm
2 Mbps
951 ft (290 m)
-89 dBm
5.5 Mbps
853 ft (260 m)
-89 dBm
11 Mbps
787 ft (240 m)
-85 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 Voice” section for more information on signal requirements.
Wireless Security
When deploying a wireless LAN, security is essential.
The Cisco Unified Wireless IP Phone 7921G supports the following wireless security features.
Authentication
• WPA (802.1x authentication + TKIP encryption)
• WPA2 (802.1x authentication + AES encryption)
• WPA-PSK (Pre-Shared key + TKIP encryption)
• WPA2-PSK (Pre-Shared key + AES encryption)
• EAP-FAST (Extensible Authentication Protocol – Flexible Authentication via Secure Tunneling)
• EAP-TLS (Extensible Authentication Protocol – Transport Layer Security)
• PEAP (Protected Extensible Authentication Protocol)
• LEAP (Lightweight Extensible Authentication Protocol)
• CCKM (Cisco Centralized Key Management)
• Open and Shared Key