Ericsson W2x Series - Manual (Page 13)

221 02-FGB 101 327 Uen C – December 2006 13
The Ericsson W20e, W21 and W25 support 1.8 and 3V SIM while the
Ericsson W20a only supports 3V SIM.
2.3 Wireless LAN (WLAN) Interface
The W2x terminals act as wireless Access Point (AP) supporting IEEE
802.11b/g standards.
IEEE 802.11b operates in the unlicensed 2.4 GHz band and can
theoretically achieve 11 Mb/s. Practical throughput, ranges from ~7 Mb/s
(using UDP) to ~6 Mb/s (using TCP). IEEE 802.11g operates in the same
band as 802.11b and has a theoretical top speed of 54 Mb/s. In practice,
throughput around 25 Mb/s is more realistic.
The transmit power is configurable and is limited to maximum 20 dBm.
For wireless security the W2x terminals support WEP, WPA-PSK, WPA2-
PSK and MAC Association Control.
2.3.1 Wireless Radio Channels
The table below shows the IEEE 802.11 channels and their corresponding
center frequencies:
Channel
Number
Channel
Frequency Geographic Indoor Usage
1 2412 MHz US (United States), CA (Canada), ETSI (ETSI
Countries), SI (Singapore), AS (Australia), NZ
(New Zealand), SA (South Africa), MA (Malaysia)
2 2417 MHz US, CA, ETSI, SI, AS, NZ, SA, MA
3 2422 MHz US, CA, ETSI, SI, AS, NZ, SA, MA
4 2427 MHz US, CA, ETSI, SI, AS, NZ, SA, MA
5 2432 MHz US, CA, ETSI, SI, AS, NZ, SA, MA
6 2437 MHz US, CA, ETSI, SI, AS, NZ, SA, MA
7 2442 MHz US, CA, ETSI, SI, AS, NZ, SA, MA
8 2447 MHz US, CA, ETSI, SI, AS, NZ, SA, MA
9 2452 MHz US, CA, ETSI, SI, AS, NZ, SA, MA
10 2457 MHz US, CA, ETSI, SI, AS, NZ, SA, MA
11 2462 MHz US, CA, ETSI, SI, AS, NZ, SA, MA
12 2467 MHz ETSI, SI, AS, NZ, SA, MA
13 2472 MHz ETSI, SI, AS, NZ, SA, MA
Radio scanning makes the W2x terminals capable of sensing other access
points of the allowed channel.
2.3.2 Internal WLAN Antennas
The W2x terminals have two internal WLAN antennas (omni-directional).
The antennas are mounted orthogonally for best performance.