Northern UTA220/UTA220k manual Parameter 19 Editing PAD Service Signals, Xxx Cr Lf

D-Channel X.25

Parameter 19: Editing PAD Service Signals

Parameter 19 specifies whether editing service signals for the character delete (parameter 16) and line delete (parameter 17) are transmitted to the local DTE, and also specifies their formats. The line display (parameter 18) service signal is transmitted to the local DTE device, regardless of the parameter 19 setting.

For different local DTE devices, different editing service signals must be transmitted to the local DTE device. For example, a display terminal can display the character delete service signal as BS SP BS, which backspaces the cursor over the character to be deleted, inserts a space, and then moves the cursor back to the deleted character position. Because a printing terminal is not capable of physically removing the character to be deleted, the character delete service signal displays as a slash (/) on the printing terminal device. If parameter 6 (control of PAD service signals) is disabled, the value of parameter 19 is ignored.

Note: None of the service signals are transmitted to the local

DTE display device if there are no characters stored by the

PAD or parameter 6 is set to 0.

	Table 12-25: Editing PAD Service Signals
Value	Description
0	No editing PAD service signals. Line display service signals are
	transmitted to the DTE
1	For edit character, the corresponding service signal is transmitted to
	the DTE printing device:
	Edit Character	Service Signal
	Character Delete	/
	Line Delete	XXX CR LF
2	For edit character, the corresponding service signal is transmitted to
	the DTE display device: *
	Edit Character	Service Signal
	Character Delete	BS SP BS
	Line Delete	Transmit total character number
		of BS SP BS
	Line Display	Display of last line of characters

*default

UTA220/UTA220k 12-31