Cisco 7921G - Unified Wireless IP Phone VoIP Datasheet - Page 4
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Support mode
Data rates
Nonoverlapping channels
Wireless modulation
Receiver sensitivity
(typical)
Transmitter output power
Range
(stated ranges are from
measured open-site range
testing)
Security features
Access Point support
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● IEEE 802.11a
● IEEE 802.11b/g
● Autosensing; IEEE 802.11b/g preferred over IEEE 802.11a
● Autosensing; IEEE 802.11a preferred over IEEE 802.11b/g
● Received signal strength indicator (RSSI) (default)
IEEE 802.11a:
● 6, 9, 12, 18, 24, 36, 48, and 54
Mbps
● IEEE 802.11a: Up to 23 (including radar channels)
● IEEE 802.11b/g: 3 (Japan can use 4)
● IEEE 802.11a: OFDM
● IEEE 802.11b: Direct sequence spread spectrum (DSSS)
● IEEE 802.11g: OFDM and DSSS
IEEE 802.11a:
● 6 Mbps: –89 dBm
● 9 Mbps: –88 dBm
● 12 Mbps: –86 dBm
● 18 Mbps: –85 dBm
● 24 Mbps: –82 dBm
● 36 Mbps: –80 dBm
● 48 Mbps: –76 dBm
● 54 Mbps: –74 dBm
IEEE 802.11a OFDM:
● 40 mW (16 dBm)
● 32 mW (15 dBm)
● 20 mW (13 dBm)
● 8 mW (9 dBm)
● 3.2 mW (5 dBm)
● 1 mW (0 dBm)
IEEE 802.11a:
● 6 Mbps: 610 ft (186 m)
● 9 Mbps: 610 ft (186 m)
● 12 Mbps: 558 ft
(170 m)
● 18 Mbps: 541 ft
(165 m)
● 24 Mbps: 508 ft
(155 m)
● 36 Mbps: 426 ft
(130 m)
● 48 Mbps: 328 ft
(100 m)
● 54 Mbps: 295 ft (90 m)
Ranges and actual throughput vary based upon numerous environmental factors so individual performance may
differ.
®
● Cisco Aironet
350 Series Access Point
● Cisco Aironet 1000 Series Lightweight Access Point
● Cisco Aironet 1100 Series Access Point
● Cisco Aironet 1130 AG Access Point
● Cisco Aironet 1140 Series Access Point
● Cisco Aironet 1200 Series Access Point
● Cisco Aironet 1240 AG Access Point
● Cisco Aironet 1300 Series Access Point
IEEE 802.11b:
● 1, 2, 5.5, and 11 Mbps
IEEE 802.11b:
● 1 Mbps: –95 dBm
● 2 Mbps: –89 dBm
● 5.5 Mbps: –89 dBm
● 11 Mbps: –85 dBm
IEEE 802.11b CCK:
● 50 mW (17 dBm)
● 20 mW (13 dBm)
● 8 mW (9 dBm)
● 3.2 mW (5 dBm)
● 1 mW (0 dBm)
IEEE 802.11b:
● 1 Mbps: 1,027 ft
(313 m)
● 2 Mbps: 951 ft (290 m)
● 5.5 Mbps: 853 ft
(260 m)
● 11 Mbps: 787 ft
(240 m)
Required versions:
● Cisco Wireless LAN Controller (Lightweight) 4.0 or
later
● Version 5.2.157.0.0 or later recommended
●
● Cisco IOS Software Access Points (Autonomous),
Release 12.3(8)JEA or later
● Version 12.3(4g)JA1 or later recommended (applies
to Cisco Aironet 1130 AG and 1240 AG Access
Points and Cisco Aironet 1250 Series only)
Data Sheet
IEEE 802.11g:
● 6, 9, 12, 18, 24, 36, 48, and 54
Mbps
IEEE 802.11g:
● 6 Mbps: –90 dBm
● 9 Mbps: –89 dBm
● 12 Mbps: –87 dBm
● 18 Mbps: –85 dBm
● 24 Mbps: –82 dBm
● 36 Mbps: –78 dBm
● 48 Mbps: –74 dBm
● 54 Mbps: –73 dBm
IEEE 802.11g OFDM:
● 40 mW (16 dBm)
● 32 mW (15 dBm)
● 20 mW (13 dBm)
● 8 mW (9 dBm)
● 3.2 mW (5 dBm)
● 1 mW (0 dBm)
IEEE 802.11g:
● 6 Mbps: 722 ft (220 m)
● 9 Mbps: 656 ft (200 m)
● 12 Mbps: 623 ft
(190 m)
● 18 Mbps: 623 ft
(190 m)
● 24 Mbps: 623 ft
(190 m)
● 36 Mbps: 492 ft
(150 m)
● 48 Mbps: 410 ft
(125 m)
● 54 Mbps: 394 ft
(120 m)
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