產品主要特點：

Table 2-1 Feature

Feature Description
Working bands
GSM/GPRS/EDGE 850/900/1800/1900 （MHz）
HSPA+/HSUPA/HSDPA/WCDMA 2100/1900/900/850 （MHz）
Normal working temperature: –10°C to +55°C
Working
temperature Extreme working temperatures: –20°C to –10°C and +55°C to
+70°C
Ambient
temperature for
storage
–40°C to 85°C
Power voltage 3.3 V±9 %（3.3 V is recommended）
AT commands See the HUAWEI EM820W HSPA+ PC Embedded Module
Software Guide Specification.
One standard Subscriber Identity Module （SIM） card interface （3
V or 1.8 V）
USB 2.0 （high speed）
Application
interface （52pin
Mini PCI-E
interface）
WAKE#: Wake up signal
HUAWEI EM820W HSPA+ PC Embedded Module
Hardware Guide Overall Description
Issue 01 （2010-12-31） Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd. 3
Feature Description
W_Disable#: for turning on/off the RF signal.
LED_WWAN#: Active-low LED signal indicating the state of the
card
Power Interface
New message alert, receiving and sending text messages
Management of text messages: read messages, delete
SMS messages, storage status, and message list
Support for the protocol data unit （PDU） mode
GSM CS: 9.6/14.4 kbps
GPRS/EDGE: Multi-slot Class 12, Class B
WCDMA CS: UL 64kbps/DL 64kbps
WCDMA/HSDPA PS: UL384kbps/DL3.6Mbps, HSDPA Category
6, 8, 9, 10, 12, 14
Data services