Xircom An Intel Company GEM3501 User Manual
Core Engine GSM/GPRS Modem Developer Guide Preliminary Draft: 7/6/2001
9
Part Number: 07100026, Revision: 002
Confidential
© 2001 Xircom, Inc., an Intel company All rights reserved.
All trademarks and copyrights are the property of Xircom, Inc., an Intel company
All trademarks and copyrights are the property of Xircom, Inc., an Intel company
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The Core Engine modem is a compact, wireless modem that utilizes the international
standard Global System for Mobile communications (GSM). The device enables low-cost,
application-specific, two-way communication and control. It takes full advantage of GSM
capabilities such as Subscriber Identity Modules (SIM), which are "smart cards" that
provides numerous advantages.
standard Global System for Mobile communications (GSM). The device enables low-cost,
application-specific, two-way communication and control. It takes full advantage of GSM
capabilities such as Subscriber Identity Modules (SIM), which are "smart cards" that
provides numerous advantages.
Over-the-air communication lets the Core Engine accomplish tasks that previously
required on-site visits and offers innovative new service capabilities never before
available. In addition, terminal authentication and data encryption ensures a more
confidential communication link between the terminal user and the data recipient.
required on-site visits and offers innovative new service capabilities never before
available. In addition, terminal authentication and data encryption ensures a more
confidential communication link between the terminal user and the data recipient.
3.1 GSM Overview
The GSM communications standard, already widely deployed in Europe, Asia, and North
America, overcomes many of the drawbacks found in other wireless telemetry
approaches. The GSM communications network was designed from the ground up, for
reliable and inexpensive digital data transfers.
America, overcomes many of the drawbacks found in other wireless telemetry
approaches. The GSM communications network was designed from the ground up, for
reliable and inexpensive digital data transfers.
The GSM network employs integrated data and data-friendly capabilities such as short
message services, circuit switched data and, soon, GPRS, which brings the best of
wireless and packet data into harmony and will make new services even more practical
and affordable. In many countries around the world, especially in Western Europe, GSM-
based networks are the only digital networks deployed.
message services, circuit switched data and, soon, GPRS, which brings the best of
wireless and packet data into harmony and will make new services even more practical
and affordable. In many countries around the world, especially in Western Europe, GSM-
based networks are the only digital networks deployed.
The Core Engine modem leverages existing public GSM networks, as opposed to other
systems that require the utility to build, operate, and maintain expensive private wireless
networks.
systems that require the utility to build, operate, and maintain expensive private wireless
networks.
3.2 Model Variation
The Core Engine modem supports GSM Short message service (SMS), voice, and circuit
switched data (transparent and non-transparent mode) up to 9.6 Kbps. This modem also
is GPRS hardware ready. It provides GPRS packet data up to and including Class 10, in
addition to Short Message Service (SMS), voice, and circuit switched data (transparent
and non-transparent mode) up to 9.6 Kbps.
switched data (transparent and non-transparent mode) up to 9.6 Kbps. This modem also
is GPRS hardware ready. It provides GPRS packet data up to and including Class 10, in
addition to Short Message Service (SMS), voice, and circuit switched data (transparent
and non-transparent mode) up to 9.6 Kbps.
!
Core Engine modems are available in the following configuration:
!
1900 MHz:
Part # 4200-1100
3.3 General Description
The Core Engine Carrier Board assembly provides DC to DC conversion and standard
interface connections with drivers for two serial interfaces, a voice interface, and DC
power.
interface connections with drivers for two serial interfaces, a voice interface, and DC
power.
The modem operates under a wide range of DC input power. Communication is through
an RS-232 physical interface, using the GSM - AT command set.
an RS-232 physical interface, using the GSM - AT command set.