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Char.erase (Character Erase)
Configurations: Asynchronous DCE, Asynchronous DTE
Data Protocols: X.25, Mode 3
This option allows you to choose the character you will use as an erase character when Edit is on.
Choose bs if you want to use backspace or CtrlH to erase characters. Choose del if you prefer the
[
] key. The Char.erase character is not sent out in the data packet, even if Forwarding is set to any
DEL
control character or Delete. You need not set Char.erase to off when you want to disable local editing.
Instead, simply set Edit to off.
Without Help
0
1
2
Data.rest (Data Restriction)
Configurations: Synchronous DCE
This option causes the 7500 to request either a restricted or an unrestricted data channel when
setting up a 64 kbps data call.
Restricted data channels are those which do not allow the transmission of occurrences of more than
seven contiguous zero bits. Unrestricted channels, sometimes called clear channels, are not limited by
this constraint. If your data contains occurrences of more than seven contiguous zero bits, you must
select Data.rest off, i.e., you must request an unrestricted (clear) data channel. If you do request an
unrestricted (clear) data channel and the network has only restricted channels available, the network
will reject your call.
If you select a restricted channel (Data.rest on), the 7500 does not enforce the data restriction i.e., it
will not check your data to ensure that you do not send more than seven contiguous zero bits.
Synchronous DCE
Option Values For Busyout
Front Panel
Without Help
With Help
0
OFF
1
ON
Asynchronous DCE and Asynchronous DTE
Option Values For Char.erase
Front Panel
With Help
OFF
BS
DEL
CHAPTER 4: DEFINITIONS OF 7500 OPTIONS
Factory Value
CMD
Mode
DCE
Option
CMD
Description
Mode
off
Backspace key
bs
(or CtrlH)
Delete key
del
X
Factory Value
DTE
DCE
X
X
55
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