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AT Commands

AT command formats

&Zn=x Store telephone number

This command is used to store up to four dialing strings in the modem’s nonvolatile memory for later dialing. The format for the command is &Zn=“stored number” where n is the location 0-3 to which the number should be written. The dial string may contain up to 34 characters. The ATDS=n command dials using the string stored in location n.

Result codes:

OK

n = 0,1,2,3

ERROR Otherwise

\Nn Error control mode selection

This command determines the type of error control used by the modem when sending or receiving data.

\N0

Buffer mode. No error control. (Also known as

 

Normal Mode.)

\N1

Direct mode.

\N2

MNP or disconnect mode. The modem attempts

 

to connect using MNP2-4 error control

 

procedures. If this fails, the modem disconnects.

 

This is also known as MNP-reliable mode.

\N3

V.42, MNP, or buffer (default).

 

The modem attempts to connect in V.42 error

 

control mode. If this fails, the modem attempts

 

to connect in MNP mode. If this fails, the

 

modem connects in buffer mode and continues

 

operation. This is also known as V.42/MNP

 

auto-reliable mode.

\N4

V.42 or disconnect. The modem attempts to

 

connect in V.42 error control mode. If this fails,

 

the call will be disconnected.

\N5

V.42. MNP or Buffer (same as \N3).