EDW-ML8021
GSM GPRS Modem User’s Manual
Page 3
1. Introduction
This document defines the
EDW-ML8021
module series and describes the hardware interface of the
EDW-ML8021
module that connects to the customer application and the hardware interface.
This document can help customer quickly understand module interface specifications, electrical
and mechanical details. With the help of this document, associated application notes and user
guide, customer can use
EDW-ML8021
module to design and set up mobile applications
quickly.
2. Product concept
The
EDW-ML8021
is a Quad-band GSM/GPRS engine that works at frequencies
GSM850MHz, GSM900MHz, DCS 1800MHz andPCS1900MHz. The
EDW-ML8021
features
GPRS multi-slot class 12 and supports the GPRS coding schemes CS-1, CS-2, CS-3 and CS-4.
The
EDW-ML8021
is integrated with Internet service protocols, which are TCP/UDP, FTP and HTTP.
Extended AT commands have been developed for customer to use these Internet service protocols
easily.
Table 1 Module key features
Feature
Implementation
Power supply
Single supply voltage 5.0V
–
12V.
Frequency bands
●
Quad-band: GSM850, GSM900, DCS1800, PCS1900.
●
The module can search these frequency bands automatically
●
The frequency bands can be set by AT command.
●
Compliant to GSM Phase 2/2+
Transmitting power
●
Class 4 (2W) at GSM850 and GSM900
●
Class 1 (1W) at DCS1800 and PCS1900
GPRS connectivity
●
GPRS multi-slot class 12 (default)
●
GPRS multi-slot class 1~12 (configurable)
●
GPRS mobile station class B
Temperature range
●
Normal operation: -35
°
C ~ +80
°
C
●
Restricted operation: -45
°
C ~ -35
°
C and +80
°
C ~ +85
°
C
1)
●
Storage temperature: -45
°
C ~ +90
°
C
DATA GPRS:
●
GPRS data downlink transfer: max. 85.6 kbps
●
GPRS data uplink transfer: max. 85.6 kbps
●
Coding scheme: CS-1, CS-2, CS-3 and CS-4
