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 on-line

 

 

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 C. Manual modem commands 37

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Lenovo 8326, 8288, 8342, 8329, 8297, 8380 manual Extended AT commands