19
7. The Option Switches
7. The Option Switches
1 2
AA
Smt Asy Ans
A
B
Dis Dmb Syn Ori
1
2
3
4
5 6
TD
RD
Mode
Talk
Data
AA
1
2
OH CD
TR
3
Front Panel Door Open
Showing Switches
1 2
AA Smt Asy Ans
A B Dis Dmb Syn Ori
1
2
3
4
5 6
Mode
Data
Talk
The Option Switches
The Option switches allow you to control the operation of your
modem in Dumb mode, as well as providing additional
features in Smart mode.
Switches 1 and 2
are used to select AT command mode or
V.25bis command mode, or control the state of the DTR and
DSR signals.
Description
AT%F
Switch 1
Switch 2
AT command mode
%F0
Up
Up
V.25bis asynchronous
%F0
Up
Down
V.25bis synchronous (HDLC framing) %F0
Down
Up
V.25bis sync (BSC character framing) %F0
Down
Down
DTR controlled by computer
%F1
Up
n/a
DTR assumed to be asserted (raised)
%F1
Down
n/a
DSR acts normally
%F1
n/a
Up
DSR mimics DTR%F1
n/a
Down
Содержание PRO/6
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