Command

Options

Function & Description

Ref.

 

,

 

Pause for a time specified in S8.

 

 

 

 

Remaining digits will be dialed as in-

 

 

 

 

band DTMF.

 

 

;

 

Return to command state after

 

 

 

 

dialing.

 

 

!

 

Hook flash.

 

 

@

 

Wait for a 5 second silence before

 

 

 

 

proceeding.

 

 

R

 

Reverse handshake (go on-line in

S17.5

 

 

 

Answer mode).

 

 

W

 

Wait for second dial tone.

 

 

 

 

Remaining digits will be dialed as in-

 

 

 

 

band DTMF.

 

DL

 

 

Repeat last ATD command.

 

DSn

n=0-49

Dial number stored in non-volatile

S44.3

 

 

 

RAM at location 'n'; use “+” to dial

 

 

 

 

two consecutive numbers for

 

 

 

 

bundling or MPPP calls.

 

En

 

 

Command mode local echo of

S23.0

 

 

 

keyboard commands.

 

 

E0

 

Echo off.

 

 

E1

*

Echo on.

 

Hn

 

 

On/off hook control

 

 

H0

*

Hang up (on-hook) the modem or

 

 

 

 

ISDN, same as 'ATH'.

 

 

H1

 

Off hook the modem.

 

In

 

 

Display inquired information.

 

 

I0

 

Display numerical product code,

 

 

 

 

same as 'ATI'.

 

 

I1

 

Display product information and

 

 

 

 

ROM checksum.

 

 

I2

 

Display modem link status report.

 

78 AT Command Set Summaries

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ZyXEL Communications U-336R/RE manual Command Options Function & Description