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6–5
RTS OPTIONS
DSR OPTIONS
COMMAND ECHO
RESULT CODE
DTE ASYNC SPEED
+ IGNORED AT&R1 The modem assumes that RTS is always ON
and ignores the serial port signals. (Default)
CTS TRACKS
RTS
AT&R0 Delay before CTS responds to RTS's change.
The delay is set in S26.
Note: Effective only in synchronous mode. This setting is ignored in asyn-
chronous mode. RTS is always used as a hardware flow control sig-
nal in this case.
+ ALWAYS ON AT&S0 The modem forces DSR to always remain ON.
(Default)
DATA SET
READY
AT&S1 According to ITU-T. DSR ON during handshake.
If S41.5=1, DSR follows CD, and pulses off for
0.5 sec for CD on-off transition. If S44.4=1,
DSR follows DTR.
+ ENABLED ATE1 The modem echoes commands. (Default)
DISABLED ATE0 The modem does not echo commands.
+ ENABLED ATQ0 The modem returns result codes. (Default)
DISABLED ATQ1 The modem does not return result codes.
ATQ2 If S40.1=1, the modem does not return result
codes in answer mode.
230400 Selects DTE port asynchronous serial speed. AT
command auto speed detection will override
this selection.
115200
76800
57600 307200
38400 153600
19200 102400
16800 61400
14400 51200