Specifications

February 23, 2000 Motorola Personal Communications Sector Page 1
Satellite Subscriber Products Division
Motorola Personal Communications Sector
Satellite Subscriber Products Division
ISU AT Command Reference Introduction
1 Introduction
1.1 Scope
This document is intended as a reference guide to the usage of the AT command set for the Iridium
TM/SM
sub-
scriber unit. This document only applies to the Motorola satellite series.
The intended audience for this document are the field test engineers, product and intelligent peripheral
developers. It is not meant for subscriber use.
1.2 Reference
[1] AT Commands for RC288ACx and RC144ACx Modem Families (Rockwell Semiconductor Systems)
[2] GSM Data Adaptor for Motorola Handsets AT Command Reference
[3] ITU-T Recommendation V.25ter, 08/95.
[4] ETS 300 642: Digital Cellular Telecommunications System (Phase 2); AT Command Set for GSM
Mobile Equipment (GSM 07.07).
[5] Iridium Specific AT Commands, SSP-ISU-CPSW-USER-0005
[6] ETS 300 585: Digital Cellular Telecommunications System (Phase 2); Use of DTE-DCE Interface
SMS and CBS (GSM 07.05)
[7] ITU-T Recommendation V.24, 03/93.
1.3 Terms and Abbreviations
Asynchronous
A serial data transmission method that uses Start and Stop bits to synchronize reception.
AT Commands
A group of commands that can be sent by a terminal or host computer to control the ISU in Command
mode.
Baud
One signalling element per second. This is a measure of the signalling rate on the telephone line. It
should not be confused with Bits Per Second (bps) which can differ from the Baud rate.
Bit Mapped Registers
Bit mapping is a technique that allows a single S-Register to hold up to 8 binary variables e.g.:
Reg Type Val Default Function
S14 Bit Mapped 170 Register S14 is a bit-mapped register
and provides the following functions:
Bit 0 Reserved
Bit 1 Echo commands to DTE
Bit 2 Responses
Bit 3 Word or number responses
Bit 4 Reserved
Bit 5 dialing method