Table 3. Modem command list (continued)

Command

Description

Syntax

Values

 

 

 

 

X

Extended Result Codes

X<value>

<value>

 

 

 

0: CONNECT result code is

 

 

 

given upon entering online

 

 

 

data state. Dial tone and busy

 

 

 

detection reporting are disabled.

 

 

 

1: CONNECT <text> result code

 

 

 

is given upon online data state.

 

 

 

Dial tone and busy detection

 

 

 

reporting are disabled.

 

 

 

2: CONNECT <text> result code

 

 

 

is given upon entering online

 

 

 

data state. Dial tone detection

 

 

 

reporting is enabled, and busy

 

 

 

detection reporting is disabled.

 

 

 

3: CONNECT <text> result code

 

 

 

is given upon entering online

 

 

 

data state. Dial tone detection

 

 

 

reporting is disabled, and busy

 

 

 

detection reporting is enabled.

 

 

 

4: CONNECT <text> result code

 

 

 

is given upon entering online

 

 

 

data state. Dial tone and busy

 

 

 

detection reporting are both

 

 

 

enabled.

 

 

 

 

&C

RLSD Behavior

&C[<value>]

<value>

 

 

 

0: RLSD is always ON.

 

 

 

1: RLSD follows the state of the

 

 

 

carrier.

 

 

 

 

&D

DTR Behavior

&D[<value>]

<value>

 

 

 

0: Modem ignores DTR.

 

 

 

1: Upon an on-to-off transition

 

 

 

of DTR, the modem enters online

 

 

 

command state and issues an

 

 

 

OK result code; the call remains

 

 

 

connected.

 

 

 

2: Upon an on-to off transition

 

 

 

of DTR, the modem instructs the

 

 

 

underlying modem to perform

 

 

 

an orderly cleardown of the call.

 

 

 

The disposition of any data in the

 

 

 

modem pending transmission to

 

 

 

the remote modem is controlled

 

 

 

by the +ETBM parameter;

 

 

 

otherwise, this data is sent

 

 

 

before the call is cleared, unless

 

 

 

the remote modem clears the

 

 

 

call first (in which case pending

 

 

 

data is discarded). The modem

 

 

 

disconnects from the line.

 

 

 

Automatic answer is disabled

 

 

 

while DTR remains off.

 

 

 

 

62User Guide

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Lenovo NVS-4200M, 42825BU, 4242X04, 42421A0 manual Xvalue Value, Cvalue Value, Dvalue Value

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