Lenovo 4157 User Manual - Page 63

Extended AT commands, Grant Remote Digital Loopback Test request

Page 63 highlights

Extended AT commands Command &C_ &D_ &F_ &G_ &K_ &M_ &P_ &R_ &S_ &T_ &V &C0 &C1 &D0 &D1 &D2 &D3 &F &G0 &G1 &G2 &K0 &K3 &K4 &K5 &K6 &M0 &P0 &P1 &P2 &P3 &R0 &R1 &S0 &S1 &T0 &T1 &T3 &T4 &T5 &T6 &T7 &T8 &V0 Function Force Carrier Detect Signal High (ON) Turn on CD when remote carrier is present Modem ignores the DTR signal Modem returns to Command Mode after DTR toggle Modem hangs up, returns to the Command Mode after DTR toggle Resets modem after DTR toggle Recall factory default configuration Guard tone disabled Guard tone disabled 1800 Hz guard tone Disable flow control Enable RTS/CTS hardware flow control Enable XON/XOFF software flow control Enable transparent XON/XOFF flow control Enable both RTS/CTS and XON/XOFF flow control Asynchronous operation US setting for off-hook-to-on-hook ratio UK and Hong Kong off-hook-to-on-hook ratio Same as &P0 setting but at 20 pulses per minute Same as &P1 setting but at 20 pulses per minute Reserved CTS operates per flow control requirements Force DSR Signal High (ON) DSR off in command mode, on in online mode Ends test in progress Perform Local Analog Loopback Test Perform Local Digital Loopback Test Grant Remote Digital Loopback Test request by remote modem Deny Remote Digital Loopback Test request Perform a Remote Digital Loopback Test Perform a Remote Digital Loopback Test and Self-Test Perform Local Analog Loopback Test and Self-Test Displays Active and Stored Profiles Appendix A. Manual modem commands 55

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Extended AT commands
Command
Function
&C_
&C0
Force Carrier Detect Signal High (ON)
&C1
Turn on CD when remote carrier is present
&D_
&D0
Modem ignores the DTR signal
&D1
Modem returns to Command Mode after DTR
toggle
&D2
Modem hangs up, returns to the Command
Mode after DTR toggle
&D3
Resets modem after DTR toggle
&F_
&F
Recall factory default configuration
&G_
&G0
Guard tone disabled
&G1
Guard tone disabled
&G2
1800 Hz guard tone
&K_
&K0
Disable flow control
&K3
Enable RTS/CTS hardware flow control
&K4
Enable XON/XOFF software flow control
&K5
Enable transparent XON/XOFF flow control
&K6
Enable both RTS/CTS and XON/XOFF flow
control
&M_
&M0
Asynchronous operation
&P_
&P0
US setting for off-hook-to-on-hook ratio
&P1
UK and Hong Kong off-hook-to-on-hook ratio
&P2
Same as &P0 setting but at 20 pulses per
minute
&P3
Same as &P1 setting but at 20 pulses per
minute
&R_
&R0
Reserved
&R1
CTS operates per flow control requirements
&S_
&S0
Force DSR Signal High (ON)
&S1
DSR off in command mode, on in online
mode
&T_
&T0
Ends test in progress
&T1
Perform Local Analog Loopback Test
&T3
Perform Local Digital Loopback Test
&T4
Grant Remote Digital Loopback Test request
by remote modem
&T5
Deny Remote Digital Loopback Test request
&T6
Perform a Remote Digital Loopback Test
&T7
Perform a Remote Digital Loopback Test and
Self-Test
&T8
Perform Local Analog Loopback Test and
Self-Test
&V
&V0
Displays Active and Stored Profiles
Appendix A. Manual modem commands
55