Overview - Siemens M20 Terminal Technical Description

Siemens Information and Communication Products
1

Overview

This document describes all the features, functions and interfaces of the Siemens M20 and M20 Terminal Cellular Eng-
ines. In addition, it states the base unit requirements which apply in connection with the operation of M20/M20 Terminal.
M20 Terminal combines the functions of the M20 unit with all peripheral devices necessary for plug-and-play usage (SIM
card reader, V.24 serial Interface, Western plugs for handset and power supply) and a wide range of supply voltages. For
additional information on M20 Terminal, see Chapter
This document also includes the list of AT commands implemented at the serial interface and describes the MMI imple-
mented at the display and keypad interface, the options for external M20 diagnostics, safety precautions for M20 users
and M20 technical data.
In addition, this document provides service information and application notes and indicates the sources of components
necessary for operation e.g. SIM reader, handset, display and keypad.
Chapters on application notes with information on getting started, diagnostics and type approval complete this document.
IMPORTANT:
This technical description applies to all M20 devices with SW Version 3.3 or higher and version number
S30880-S8000-A100-1.
Users of the M20 are expressly requested to begin by reading the safety precautions in Chapter
.
user" on page 8
Information on finding out the software status is provided in Chapter
(AT+GMR, AT+CGMR).
If you have any technical questions regarding this document or the product described, please contact your local
distributor.
General information on cellular engines and a list of distributors can be found at the following Internet addresses:
• English language: www.siemens.de/gsm_e
• Deutsche Sprache: www.siemens.de/gsm
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably expected to result in personal injury. SIEMENS AG customers using or selling these pro-
ducts for use in such applications do so at their risk and agree to fully idemnify SIEMENS AG for any damages
resulting from such improper use or sale.
DEVELOPMENT BOX (E-BOX)
Furthermore the Development box supplied by SIEMENS AG is to be used for development and test purposes only.
The general terms of delivery or guarantee for the M20/M20T are not applicable for the Development box
Version 8 dated 15.03.00
9 "M20 Terminal" on page 202
5.5 "AT Cellular commands to GSM 07.07" on page 55
.
2 "Safety precautions for the
A

Overview

7