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8 221 02-FGB 101 327 Uen C - December 2006
2 Hardware Architecture
2.1 Power Supply
The W2x terminals can be powered from:
• AC Mains via an external AC/DC power adapter (10-28 VDC)
• Battery backup (Ericsson W25).
2.1.1 Power Adapter
The provided power adapter has the following characteristics:
Input: 100-240V AC, 50-60 Hz, 3 pole AC inlet connector (IEC 320 power
inlet).
Output: 12 VDC.
Power consumption: 7.0 W (typical) and 11.4 W (maximum) for Ericsson
W20/21 and 9.0 W (typical) and 16.2 W (maximum) for Ericsson W25.
National power plugs are available for EU, UK, US and AU.
2.1.2 Battery Backup (W25 only)
The Ericsson W25 can be fitted with a rechargeable battery to provide
redundancy in case of an AC Mains power failure. The battery is available
as an accessory and is facilitated within the unit. Additionally there is an
internal battery charger that can recharge the battery.
2.2 UMTS/GSM Radio Interfaces
The W2x terminals support UMTS and GSM/GPRS/EDGE radio interfaces
where UMTS is the primary interface.
2.2.1 UMTS
The W2x terminals support UMTS 850/1900 MHz and 2100 MHz frequency
bands.
The UMTS interface supports the following characteristics:
• WCDMA
• HSDPA Category 11 and 12 (W20)
• HSDPA Category 1-6 and 11 (W21/W25)
The Ericsson W21/W25 is software upgradeable to 7.2 Mbps which means
support for HSDPA Category 7 and 8.
2.2.2 GPRS/EDGE
The W2x terminals support GSM/GPRS/EDGE 850/900/1800/1900 MHz
frequency bands.