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White Paper T630/T628
36 October 2003
AT commands support
This section outlines the AT commands supported
by the T630/T628. The information here can be of
use for advanced users, to indicate the possibilities
they have to:
• develop new communications software
• add the T630/T628 to an application’s list of
compatible modems
• adjust the settings of their mobile telephone and
modem
The modem in the T630/T628 supports the V.25ter
command set, which is the standard communica-
tion set used by modems.
The T630/T628 is compatible with industry de facto
extensions, ETSI 07.05, 07.07 and 07.10.
Overview of AT command functions
AT commands are used to configure the mobile tel-
ephone, to request information about the current
configuration or operational status of the mobile
phone, and to test availability and request the
range of valid parameters, when applicable, for an
AT command.
The built-in modem can be set to any one of three
modes of operation. These are:
Off-line command mode
The command mode for entry of AT commands,
when the device is first turned on.
On-line data mode
Allows “normal” operation of the built-in modem,
for exchanging data or facsimiles with a remote
modem.
On-line command mode
For sending AT commands to the built-in modem
while remaining connected to a remote modem.
The AT commands are grouped as follows:
• Control and Identification
• Call Control
• Interface Commands
• Data Compression
•Mode Management
• Audio Control
• Accessory Menus
• Accessory Authentication
• Voice Call Control
• Accessory Identification
• GSM DTE-DCE Interface Commands
• GSM Call Control
•GSM Data
• GSM High Speed Circuit Switched Data
• GSM Network Services
• GSM USSD
• GSM Facility Lock
• GSM Mobile Equipment, Control and Status
• GSM Mobile Equipment Error Control
• GSM SMS and PDU Mode
•GSM GPRS
• GSM Phonebook
• GSM Clock, Date and Alarm Handling
• GSM Subscriber Identification
• Ericsson Specific AT Commands for GSM
• MMI Settings
•Voice Control
•OBEX
• WAP Browser
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