Output Parameter

Output Value Description

 

Carrier Lost

On-Line (Not

 

 

disconnected)

 

Resent Expiration

Protocol Error

 

Break Time-out

DTR Dropped

 

Carrier Lost 1

Carrier Lost 2 (Remote

 

(No handshaking

hang-up, busy tone)

 

response)

Keyboard Abort

 

Security check

Inactivity.

 

ATH command

 

 

D/V hang up.

 

Extended AT& Command Set

Command

Options

Function & Description

Ref.

&Bn

 

Data rate, terminal-to-modem.

S28.6

 

 

(DTE/DCE)

 

 

&B0

DTE rate follows connection rate.

 

 

 

(See also S44.6)

 

 

&B1 *

DTE/DCE rate fixed at DTE setting

 

 

 

(See also S18, S20, and S44.6)

 

&Cn

 

Carrier Detect (CD) options.

S21.4

 

&C0

CD always ON (See also S42.7).

 

 

&C1 *

CD tracks presence of carrier (See

 

 

 

also S38.3, S42.7).

 

&Dn

 

Data Terminal Ready (DTR) options.

S21.6-7

 

 

(See also S25)

 

 

&D0

Ignore DTR signal, assume DTR is

 

 

 

always ON.

 

 

&D1

108.1, DTR OFF-ON transition

 

 

 

causes dial of the default number.

 

 

 

(See also 'AT*Dn' and S48.4)

 

 

&D2 *

108.2, Data Terminal Ready, DTR

 

 

 

OFF causes the modem to hang up.

 

AT Command Set Summaries 83

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ZyXEL Communications U-336R/RE manual Extended AT& Command Set, Dte/Dce