Data call commands – Multi-Tech Systems MTA128ST-USB User Manual
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Chapter 4 - AT Commands, S-Registers and Result Codes
MTA128ST-USB
Data Call Commands
Use these commands to make or configure data calls.
Command: A
Function:
Answer Call
Values:
none
Default:
none
Description: Forces TA to answer an incoming call. To make the TA autoanswer, set
register S0 to a value higher than 0.
Command: D
Function:
Dial
Values:
none
Default:
none
Description: The D command causes the TA to dial a number (e.g., ATD785-3500 <cr>).
Command: DSn
Function:
Dialing a Stored Telephone Number
Values:
n = 0–9
Default:
n = 0
Description: To dial a stored telephone number, type &DSn in terminal mode, where n is
the location of the number you want to dial. For example, type ATDS3 <cr>
dials a telephone stored in memory register 3 location.
Command: Hn
Function:
Hang Up
Values:
0
Default:
n = 0
Description: Forces TA to go off-hook (to take control of the telephone line) or to go on-
hook (hang up). Since the TA goes off-hook automatically when it dials, the H
command is normally used only to hang up. To hang up, first escape to
command mode (+++AT <cr>), then type ATH (or ATH0) <cr>. You also can
include the hang-up command in the escape sequence: +++ATH <cr>.
H
Go on-hook (hang up)
Command: In
Function:
Display Product Information
Values:
n = 0, 1, 2, and 4
Default:
none
Description: Displays the following MTA128ST-USB product information.
I0
Product ID (e.g., 247)
I1
Firmware version number (e.g. 6.00)
I2
Model number (e.g., MTA128ST-USB)
I4
Date and time firmware was made
Command: O
Function:
Return Online
Values:
none
Default:
none
Description: The O command returns the TA to online mode from online comman mode.
When TA makes a data connection, it enters online data mode. TA remains in
this mode until it receives an escape sequence or until the call ends. When it
detects an escape sequence, the TA enters online command mode, where it
can accept AT commands while retaining the online connection. To return TA
to online mode from online command mode, enter ATO and press ENTER.