AL7020S Designer’s Guide
Doc. No. DG_7020C
Altec Electronic AG
Seite 5 / 32
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1.1 Models
Description
Models
Operating Bands
Interface Connectors
Interfaces / Power
AL7020S
GSM 900/1800 MHz
•
DIL-64 Header (RM2)
•
MMCX RF Connector
•
RS232 TTL Level
•
5 VDC Power
AL7020S-3V
GSM 900/1800 MHz
•
DIL-64 Header (RM2)
•
MMCX RF Connector
•
RS232 TTL Level
•
3.3 VDC Power
AL7020S-ES
GSM 900/1800 MHz
•
DIL-64 Header (RM2)
•
MMCX RF Connector
•
RS232 TTL Level
•
SIM Card Interface
•
5 VDC Power
AL7020US
GSM 850/1900 MHz
•
DIL-64 Header (RM2)
•
MMCX RF Connector
•
RS232 TTL Level
•
5 VDC Power
AL7020US-ES GSM 850/1900 MHz
•
DIL-64 Header (RM2)
•
MMCX RF Connector
•
RS232 TTL Level
•
SIM Card Interface
•
5 VDC Power
1.2 Summary
Altec’s AL7020S Socket Modem provides the OEM with a complete E-GSM/GPRS
900/1800Mhz or GSM 850/1900Mhz dual-band module in a compact socket-mountable
module.
The compact size and high level of integration of the Socket Modem minimizes real estate and
cost for motherboard and box modem applications. Its low power consumption makes it ideal
for portable applications such as pocket modems and for a wide variety of embedded control
applications. The pin compatibility between the full range of all ALXXXX Series Socket
Modems and ISDN Socket TA's allows upgrading and production configurability without
hardware changes.
This designer's guide describes the modem hardware. AT commands and S registers are
defined in the AT Command Reference Manual.
As a data modem in CSD mode, the AL7020S Socket Modem can receive data at speeds up
to 14.4 Kbps and can send data at speeds up to 14.4 Kbps. Error correction V.42 maximize
data transfer integrity. Non-error-correcting mode is also supported.
As a fax modem, the AL7020S Socket Modem supports Group 3 send and receive rates up to
14.4 kbps and supports Class I and T.30 protocols.
The Socket Modem with Voice features supports Full Rate, Enhanced Rate and Half Rate
(FR/EFR/HR). This mode supports applications such as digital telephone answering machine
(TAM), voice annotation, audio recording and playback.
The AL7020S Socket Modems supports GPRS Class B and multislot classes up to Class 8
with coding shemes CS1 to CS4. SMS services are supported in both GSM and GPRS
modes.
The GSM Socket Modems are available with internal and external SIM Card Readers.
