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Chapter 4 - AT Commands, S-Registers, and Result Codes
Description:Controls state of DSR (Data Set Ready) signal on RS232E/V.24 nterface. A
high DSR signal indicates to the computer that TA is ready to transmit data.
&S0 DSR is always high.
&S1 DSR acts normally; that is, it follows the state of the CD signal,
which goes high when the MTA128ST-USB detects a carrier signal,
and goes low when the carrier signal is lost.
&S2 DSR is always high, except on disconnect, when it drops for the
period of time set by S10 and then goes high again.
Command: &Wn
Function: Store Active Profile
Values: n = 0 or 1
Default: &W1 (Use factory default profile)
Description:Stores your active profile, or configuration, in memory, so you won't lose custom settings
when you turn off the TA or reset it.
&W0 Stores all current AT command and S-register values in nonvolatile random
access memory (NVRAM) and configures the TA so it reads your custom
settings in NVRAM when the TA is turned on or when it is reset with the Z
icommand. (The &F reset command continues to read factory default settings in
ROM.)
&W1 Erases your custom settings in NVRAM the next time the TA is
turned off or reset, causing the TA to read factory default settings in
ROM whenever it is turned on or reset.
Command: &Zn=x
Function: Store Telephone Number
Values: n = 0–9; x = dial string
Default: n/a
Description:The &Z= command lets you store a telephone number in a memory register for faster
dialing. To store a number, type &Z, the register number (0–9) where you want to store
store the number, the = character, and the dialing string that you want stored; then press
ENTER. The dialing string can have up to 25 characters. To read a stored number, type
AT&Zn? (e.g., AT&Z4?) where n is the number of the register you want to read. To
display a list of all numbers stored in memory, type ATL and press RETURN:
0 14082345678
1 17635551212
2 14089876543
3
4 6313551
5
6 4258513
7
8 17636313550
9 12138880123
Command: $Dn
Function: Persistent DTR Dialing
Values: n = 0, or 1
Default: $D0 (Disabled)
Description:Enables or disables persistent DTR dialing (PDD). PDD causes the terminal
adapter to automatically and continuously redial stored telephone number 0
when the port has no active calls and DTR is high.
$D0 Disables PDD.
$D1 Enables PDD.