Xircom An Intel Company GEM3501 User Manual
Core Engine GSM/GPRS Modem Developer Guide Preliminary Draft: 7/6/2001
10
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
3.4 Summary of the Features for the Core Engine modem
Primary serial port
V.24 protocol, 3V levels.
Secondary serial port
Secondary 3V serial port (currently restricted to debug use).
Voice
Supports two (2) vocoder modes: full-rate, and enhanced full-rate
(EFR).
Antenna
On-board microminiature coaxial connector for RF antenna.
Command protocol
AT command set.
Interface
Subscriber Identification Module
(SIM)
3V mini-SIM carrier and interface on carrier board.
Electrical power
Fixed DC voltage 3.7V +/-0.3V
Power
Peak currents and average power
dissipation
Refer to the Operating Power table in the Technical Specifications
section for peak currents and average power dissipation for various
modes of operation.
Frequency bands
PCS 1900 capability.
Radio Features
GSM features supported
Provides for all GSM authentication, encryption, and frequency
hopping algorithms.
Regulatory
Agency approvals
# GSM Type Approval – planned
# FCC Certification (Part 24) – planned
# CE (European Community Certification) – planned
# IC (Industry Canada) – planned
GSM
Functionality
Functionality
# Mobile-originated and mobile-terminated SMS messages: up to 140 bytes or up to 160 GSM 7-bit
ASCII characters.
# Reception of Cell Broadcast Message.
# SMS Receipt acknowledgement.
# Circuit Switched Data (Transparent & Non-transparent programmable from 4.8 to 9.6 Kbps).
# Voice.
# Supports GSM Phase 2+.
GPRS
Functionality
Functionality
GPRS software will be available at a later date.
Table 1: Core Engine Summary of Features
3.5 Programmer Reference
For greater flexibility that enhances the usability of the Core Engine modems, Xircom
provides a Core Engine Programmer Reference. This document goes into greater detail,
in an easy to read format, on the enhanced programming capabilities specific to the Core
Engine modem, including details of supported AT commands.
provides a Core Engine Programmer Reference. This document goes into greater detail,
in an easy to read format, on the enhanced programming capabilities specific to the Core
Engine modem, including details of supported AT commands.
3.6 Backward Compatibility
GSM functionality is forever evolving. Subsequently, in order to maintain the highest
standards, the Core Engine modems will be backward compatible with new GSM
functionality such as General Packet Radio Service (GPRS). Applications supported with
standards, the Core Engine modems will be backward compatible with new GSM
functionality such as General Packet Radio Service (GPRS). Applications supported with