Multi-Tech Systems MT3334ZDX User Manual
Page 29
3 - AT Commands, S-Registers and Result Codes
29
Command:
F
n
Echo Online Data Characters
Values:
n = 1
Default:
1
Description: F0
Enable online data character echo. (Not supported.)
F1
Disable online data character echo (included for
backward compatibility with some software).
Command:
H
n
On-Hook/Off-Hook Control
Values:
n = 0 or 1
Default:
0
Description: H0
Go on-hook to hang up.
H1
Go off-hook to make the phone line busy.
Command:
I
n
Information Request
Values:
n = 0–4
Default:
None
Description: I0
Display default speed and controller firmware
version.
I1
Calculate and display ROM checksum (e.g.,
“12AB”).
I2
Check ROM and verify the checksum, displaying
OK or ERROR.
I3
Display default speed and controller firmware
version.
I4
Display firmware version for data pump (e.g., “94”).
Command:
L
n
Monitor Speaker Volume
Values:
n = 0, 1, 2, or 3
Default:
2
Description: L0
Select low volume.
L1
Select low volume.
L2
Select medium volume.
L3
Select high volume.
Command:
M
n
Monitor Speaker Mode
Values:
n = 0, 1, 2, or 3
Default:
1
Description: M0
Speaker always off.
M1
Speaker on until carrier signal detected.
M2
Speaker always on when modem is off-hook.
M3
Speaker on until carrier is detected, except while
dialing.