User manual

2-10 AT COMMANDS: DATA MODEM

Z – Reset/Load a Stored Proﬁle

The Zn command is used to carry out a Reset of an active conﬁguration proﬁle. In

this procedure, the NVRAM values are written into the relevant Registers and the

remaining parameters are changed again to the factory settings. You use the n pa-

rameter to select one of the conﬁguration proﬁles which has been stored with &W

(n=0,1). Any command following the Z command in the same command line will

be ignored.

&C – M5 Control Line

The M5 signal at the serial interface to the DTE is always made with the &C0

command and the current status of the carrier signal from the remote modem is ig-

nored. With the &C1 command (factory setting), the M5 signal (DCD: Data Car-

rier Detect) displays the condition of the carrier signal which is received.

&F – Loading the Factory Settings

The &Fn command (n = 0,1) is used to read any of the factory settings stored in

the ROM. Any modiﬁed preliminary settings are over-written by this.

The &F1 setting is specially intended for initialisation in the BTX operating

mode, while &F0 is used for general data transmissions.

A Selection of &F0 Factory Settings

E1 Echo On

L0 Associated loudspeaker on low volume

M1 Loudspeaker On until connection is made

Q0 Modem messages switched on

V1 Complete alpha-numeric messages

Y0 Long Space Disconnect switched off

X4 Wait for dialling tone; engaged tone recognition

&B0 CCITT

&C1 M5 displays carrier recognition

&D2 Modem “hangs up” when S1 line (DTR) goes off

&G0 Guard tones switched off

&R1 M2 always On

&T4 Modem reacts to test loop request from remote party

S0=0 No automatic answer

\N3 Automatic operational mode dialling (buffering)

(Further settings are covered by the descriptions of the individual Commands and

Registers).