S4 DIP-switch
Auto retrain control
Auto retrain disabled (AT%E0)
S4 DIP-switch
Data compression control
Data compression disabled
(AT%C0)
S4 DIP-switch
DCD, DTR and DSR control
DCD and DSR always on,
DTR ignored (AT&C0&D0&S0)
S4 DIP-switch
Set modem to factory default
Restore factory default setting*
Don’t leave S4:1 in ON position if not intended to restore factory setting at every power on.
Reliable mode enable (AT\N2)
Buffer mode enabled (AT\N0)
S4 DIP-switch
Line mode setting
S4 DIP-switch
Leased Line termination
ON
1 2 3 4 5 6 7 8
Termination disabled
ON
1 2 3 4 5 6 7 8
Termination of Receiver
in 4-wire mode
ON
1 2 3 4 5 6 7 8
Termination of Transmitter / Receiver
in 2-wire mode and Transmitter in
4-wire mode
ON
1 2 3 4 5 6 7 8
Termination of both Transmitter
and Receiver in 4-wire mode
ON
1 2 3 4 5 6 7 8
Direct Mode enabled (AT\N1)