HSDPA Standard At Commands Page 7 of 60 Version 1.2
1.1. General
The 3GPP TS 27.007 technical specification defines an AT command set for use in controlling devices
that operate on WCDMA networks. This document identifies which of those AT commands are
supported on the CHU628 USB modem module.
The specification document that lists the AT command set, 3GPP TS 27.007 V5.6.0(2005-03), is
available on the 3GPP web site, www.3gpp.org.
The table below identifies whether each command is supported on the CHU628 USB module.
An “N/A in the support column of the table indicates that the command is related to a feature that is not
available on the modems.
1.2. Terms
The following terms are used throughout this document. We have provided and explanation of these
for your reference.
Table 1. Terms definition
Term Description
[ ] Field. Contents between ‘[’ and ‘]’ indicate the name of the field or the
parameter required to complete the syntax.
{ } Option field. Contents between ‘{‘ and ‘}’ indicate the name of the field or the
parameter which can be omitted.
<CR> Carriage return character, which value is specified with command S3
<del> Delimiter/Space. Insert a space.
AT command set Communications command set interface between data terminal equipment
(DTE) and data circuit terminating equipment (DCE).
DCE Same as MT2.
DTE Same as TE2
IMEI International Mobile station Equipment Identity
MO Mobile-Originated where the SMS or the call is originated [sent] by the Mobile
Station.
Mobile Station
A cellular device [e.g this modem or a mobile phone handset] in the carrier’s
domestic public cellular phone network intended to be used when stationary,
while in motion or during halts at unspecified points. Mobile stations may
include fixed, portable (e.g., hand-held personal units) or vehicular units.