All information in this section is
relevant to all members of the 3Com
Building-to-Building Bridge family,
unless otherwise stated.
MEDIA INTERFACES
Indoor Bridge (3CRWE920G73)
RJ-45, 10BASE-T/100BASE-TX,
802.11b/g
Outdoor Bridge/Access Point
(3CRWEASYA73)
10BASE-T/100BASE-TX, 802.11a/b/g
WIRELESS DATA RATES
3CRWE920G73
802.11a
: 802.11b: 11, 5.5, 2, 1 Mbps
802.11g
: 54, 48, 35, 24, 18, 12, 9, 6 Mbps
3CRWEASYA73
802.11a/g
: 6/9/12/18/24/36/48/54 Mbps;
up to 108 Mbps (turbo and super
modes)
*
802.11b
: 1/2/5.5/11 Mbps
FREQUENCY BAND
3CRWE920G73
802.11b/g
: 2.4–2.4835 GHz
3CRWEASYA73
802.11a
: 5 GHz
*
;
802.11b/g
: 2.4 GHz
USERS SUPPORTED
§
Up to 64 simultaneous wireless users
per access point radio for a total of 128
OPERATING CHANNELS
Use of this product is only authorized
for the channels approved by each
country. To conform to FCC and other
country restrictions, this product may
be limited in the channels that are
available.
MODULATION TECHNIQUE
802.11a
: BPSK, QPSK, 16-QAM, 64-QAM
802.11b/g
: CCK, BPSK, QPSK, OFDM
MEDIA ACCESS PROTOCOL
CSMA/CA
TRANSMIT POWER SETTINGS
Based on the regulatory domain set by
the system administrator, not to
exceed the following:
Indoor Bridge (3CRWE920G73)
17 dBm (U.S., Canada, Mexico)
20 dBm EIRP max. depending on
antenna and cable configuration
(Europe, U.K., Ireland, Latin America)
Outdoor Bridge/Access Point
(3CRWEASYA73)
802.11g
6 to 54 Mbps: 18 dBm (2412 and 2472
GHz ); 20 dBm (2417 - 2467 GHz )
802.11b
1 to 11 Mbps: 15 dBm (2412, 2472 and
2417 - 2467 GHz )
802.11a*
6 to 48 Mbps: 17 dBm (5.150 - 5.250,
5.250 - 5.350, 5.500 - 5.700 , and 5.725
- 5.825 GHz )
54 Mbps: 12 dBm (5.150 - 5.250 GHz ),
17 dBm (5.250 - 5.35 and 5.500 - 5.700
GHz ), 16 dBm (5.725 - 5.825 GHz )
RECEIVE SENSITIVITY
3CRWE920G73
802.11a
6 Mbps: -87 dBm
9 Mbps: -86 dBm
12 Mbps: -84 dBm
18 Mbps: -82 dBm
24 Mbps: -79 dBm
36 Mbps: -75 dBm
48 Mbps: -72 dBm
54 Mbps: -71 dBm
802.11b
1 Mbps: -91 dBm
2 Mbps: -89 dBm
5.5 Mbps: -88 dBm
11 Mbps: -86 dBm
802.11g
6 Mbps: -85 dBm
9 Mbps: -83 dBm
12 Mbps: -81 dBm
18 Mbps: -79 dBm
24 Mbps: -77 dBm
36 Mbps: -74 dBm
48 Mbps: -72 dBm
54 Mbps: -70 dBm
802.11a/g
1 Mbps: -95 dBm
2 Mbps: -92 dBm
5.5 Mbps: -91 dBm
6 Mbps: -89 dBm
9 Mbps: -88 dBm
11 Mbps: -88 dBm
12 Mbps: -86 dBm
18 Mbps: -84 dBm
24 Mbps: -81 dBm
36 Mbps: -77 dBm
48 Mbps: -73 dBm
54 Mbps: -72 dBm
3CRWEASYA73
802.11a
6 Mbps: -88 dBm
9 Mbps: -87 dBm
12 Mbps: -86 dBm
18 Mbps: -84 dBm
24 Mbps: -81 dBm
36 Mbps: -75 dBm
48 Mbps: -72 dBm
54 Mbps: -71 dBm
802.11b
1 Mbps: -93 dBm
2 Mbps: -90 dBm
5.5 Mbps: -90 dBm
11 Mbps: -87 dBm
802.11g
6 Mbps: -88 dBm
9 Mbps: -87 dBm
12 Mbps: -86 dBm
18 Mbps: -85 dBm
24 Mbps: -81 dBm
36 Mbps:
-77 dBm (5.150 - 5.350 GHz )
-78 dBm (5.500 - 5.825 GHz )
48 Mbps: -73 dBm
54 Mbps:
-69 dBm (5.150 - 5.250 GHz )
-70 dBm (5.250 - 5.700 GHz )
-67 dBm (5.725 - 5.825 GHz )
SPECIFICATIONS
3COM® 54 MBPS WIRELESS LAN BUILDING-TO-BUILDING BRIDGE FAMILY
6
* Using IEEE 802.11a for bridging is not recommended in countries requiring radar detection, as link speed and quality may be adversely
affected due to Dynamic Frequency Selection (DFS).
§
Outdoor Building-to-Building Bridge and 11b/g Access Point, 3CRWEASYA73, only.
