ZyXEL Communications U-336SA User Manual

Page 32

18 Basic Modem Operation

There are a few basic commands that do not require the “AT”
command prefix. These are as follows:

Command

Description

Repeats the last issued AT command once.

Repeats the last issued AT command once, or re-
dials the last dialed number up to 9 times until a
key is pressed or a connection is made.

Terminates the current connection attempt, if
pressed while modem is handshaking.

+++

Escape code sequence. Entered while the modem
is in Data Mode. Returns modem to Command
Mode.

The U-336S/SA supports several groups of AT commands:

AT Command Set/Type

Example

Basic AT (Hayes compatible)

ATB0

Basic AT$ (on line help)

AT$

Extended AT& commands

AT&N0

Extended AT* commands

AT*I1

Fax AT+ commands

AT+FCLASS=2

S-Register command

ATS0=1

S-Register bit-mapped command (set S-
Register bit 1 equal to 1)

ATS13.1=1

S-Register inquiry command

ATS0? Or ATS13.1?

You may browse the lists of available commands for each command set
by using the on-line help commands: AT$, AT*$, AT&$, and ATS$.
Further detail on AT commands will be covered in the chapters that
pertain to their use.

This manual is related to the following products:

U-336S