At&D Set Circuit Data Terminal Ready (Dtr) Function Mode; At&F Set All Current Parameters To Manufacturer Defaults - Siemens M20 Terminal Technical Description

Siemens Information and Communication Products
AT&D Set circuit Data Terminal Ready (DTR) function mode
Set command Response
AT&D[<value>]
This parameter determines how the TA responds when circuit 108/2 (DTR) is changed from ON to
OFF during data mode.
OK
Parameter
<value>
Reference Note
V.25ter M1: <value> 0-3
AT&F Set all current parameters to manufacturer defaults
Execute command Response
AT&F[value] TA sets all current parameters to the manufacturer defined profile.
Note:
OK
Parameter
<value>
Reference Note
V.25ter There has to be a pause of at least 300ms after the OK, before the next command is entered.
AT&S Set circuit Data Set Ready (DSR) function mode
Set command Response
AT&S<value> This parameter determines how the TA sets circuit 107 (DSR) depending on the communication
state of the TA interfacing TE.
OK
Parameter
<value>
Reference Note
V.25ter, +IDSR
Version 8 dated 15.03.00
0 TA ignores status on DTR
1 ON->OFF on DTR: change to command mode while retaining
the connected call
2 ON->OFF on DTR: disconnect call, change to command mode.
During DTR state = OFF is auto-answer off.
1) When using AT&F(CR) alone a delay of 300ms needed before next command (AT...) is
sent. Otherwise "OK" response may be corrupted.
2) No restrictions of use of "&F" within a command string. (e.g.:
AT&Fs0=1&W+cbst=7,0,1)
3) A delay of 300ms is needed before next command ist sent, otherwise "OK" response may
be corrupted.
0 set all TA parameters to manufacturer defaults
0 DSR always on
1 TA in command mode: DSR is OFF
TA in data mode: DSR is ON
AT command interface
A
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