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I NTEGRATED C IRCUITS D IVISION
AT Command Set
CPC2400E
Command
M Speaker On/Off
Function and Description
The country con?guration may disable the speaker. If so, this command will return an ERROR result.
Options
M0 Speaker always off.
M1 Speaker on until carrier detected. This is the default value in North America.
M2 Speaker always on; stays on after carrier is detected.
M3 Speaker off as digits are dialed, but on during ringback and on until carrier signal is detected.
O
Return to On-Line This command returns the modem to the on-line mode. It is frequently used after th escape character sequence
Mode
(+++) to resume communication with the remote modem. If handshaking is started, the modem uses Originate or
Answer mode handshaking depending upon whether the modem originated or answered the telephone call.
O0 Return the modem to the On-Line state from the Command state during a telephone line connection.
The modem starts handshaking if there was no telephone line connection but the modem was off
hook.
O1 Return the modem to the On-Line state and retrain its data pump during a telephone line connection.
The modem starts handshaking if there was no telephone line connection but the modem was off
hook.
&P
Q
Sn
?
=x
Pulse Dial Make/
Break Ratios
Result Code
Display Options
Set the current
S-register to n
Read an
S-Register
Write an
S-Register
Sets cadence of pulse dial. The country con?guration may disable this command, forcing particular pulse dialing
parameters. In this event, the modem returns an ERROR result if this command is issued.
&P0
39%/61% make/break ratio and 10 pulses per second when pulse dialing. This is the default value.
&P1 33%/67% make/break ratio and 10 pulses per second when pulse dialing.
&P2 39%/61% make/break ratio and 20 pulses per second when pulse dialing.
&P3 33%/67% make/break ratio and 20 pulses per second when pulse dialing
This command allows the user to either display result codes or to not display result codes.
Q0
Result codes will be displayed. This is the default value for North America.
Q1 Result codes will not be displayed.
This command sets the current S-register to the value “n” selected by the user. For example, ATS7 will set the current
S-register to S7. Default value is 0. Sn addresses a particular S-register number so future commands like ? and = will
read of write the S-register. Modem reset and the &F command select S0 as the default S-register.
This command displays the value of the last S-register named in the Sn command.
This command writes the value x to the last S-register named in the Sn command. The range of valid values for x
depends upon which S-register is being written. 0 is assumed if no value is given for x.
T
Tone Dialing Selects the tone method of dialing.
V
Result Code
This command changes the format in which result codes are displayed.
Format
V0 All result codes will be displayed as numbers.
V1
All result codes will be displayed as words (verbose form). This is the default value for North America.
R03
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