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CHAPTER 4: DEFINITIONS OF 7500 OPTIONS
Duplex
Configurations: Synchronous DCE
The setting of this option determines whether the 7500-Synchronous operates in full duplex or
half-duplex emulation. Select full if you want full duplex operation; select half if you want half duplex
emulation. This option only applies to speeds from 1.2 through 19.2 kbps, and 56 kbps.
Echo
Configurations: Asynchronous DCE, Asynchronous DTE
Data Protocols: X.25, Mode 2, Mode 3
This option determines whether characters sent from the data terminal in Data Mode are echoed by
the 7500.
If you select on, the 7500 will echo all characters sent by your data terminal during Data Mode.
However, the Rec.flow, Trans.flow, Char.erase, and Line.erase characters are not echoed.
Select on if your host computer or other data endpoint does not echo characters. In addition, you
will want to turn your data terminal's echo capability off.
If you select off, the 7500 will not echo characters sent during the Data Mode. Thus, if your host
computer or other data endpoint echoes characters for you, select off. Otherwise, each character you
type will be displayed twice. If you are transferring files, you will want to turn Echo off.
Without Help
58
Synchronous DCE
Option Values For Duplex
Front Panel
Without Help
With Help
0
HALF
1
FULL
Asynchronous DCE and Asynchronous DTE
Option Values For Echo
Front Panel
With Help
0
OFF
1
ON
CMD
Factory Value
Mode
DCE
X
CMD
Factory Value
Mode
DCE
DTE
off
X
X
on
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