Specifications

February 23, 2000 Motorola Personal Communications Sector Page 7
Satellite Subscriber Products Division
Motorola Personal Communications Sector
Satellite Subscriber Products Division
ISU AT Command Reference Basic AT Commands
3 Basic AT Commands
3.1 AT - ATtention Code
This is the prefix for all commands except A/ and +++. When entered on its own, the ISU will respond OK.
3.2 A/ - Repeat Last Command
Repeat the last command issued to the ISU unless the power was interrupted or the unit is reset. A/ is not
followed by <CR>.
3.3 +++ - Escape Sequence
The escape sequence is used to transfer from data mode to command mode without disconnecting from the
remote modem. After a pause, the ISU will respond with OK. Register S2 can be used to alter the escape
character from +, the factory default, to any hexadecimal value in the range 0 to 255.
3.4 A - Answer
Answer immediately. This causes the ISU to answer the incoming call.
3.5 Bn - Communication Standards
Select the communications standard to be used for data calls.
No action, compatibility only.
Any value for n accepted.
3.6 Cn - Carrier Control
Control carrier detection.
No action, compatibility only.
Only n=1 accepted.
3.7 D - Dial
Dial a number. The dial command causes the ISU to enter originate mode and act as an auto dialer for con-
nection to other modems or fax machines. The usual format is ATDnx..x where n is a Dial Modifier and x is
a number. The following are valid numbers: 0123456789*#ABC. Dial modifiers are used to alter the manner
in which the ISU dials.
L Redial last number.
P Use pulse dialing.
No action, compatibility only.
S=n Dial stored telephone number n (0-3), previously stored using the &Zn=x..x command.
T Use tone dialing.