Black Box SW591C, SW590A-R2 manual Set SWF

Automatic Timeout

The COS II times the intervals between the reception of each character and the next. You may instruct it to return to an unlinked state after intervals of 2.5, 5, or 10 minutes, or you may disable this automatic timeout feature. SWF 5 and SWF 6 control this feature.

	Set SWF-
Timeout Setting	5	6
2.5 minutes	ON	ON
5 minutes	OFF	ON
10 minutes	ON	OFF
Disabled	OFF	OFF

Graphics Pause

These switch settings are followed only when the COS II has been set previously for Graphics Mode (for an explanation, see Section 4.5). They determine the amount of time that must pass before the COS II recognizes a control code sequence.

By providing for this pause, it is possible to send graphics files through the unit with no risk that it will switch accidentally when it encounters a control code sequence, or its binary equivalent. SWF 7 and SWF 8 determine the length of the pause.

CTS-to-DTR Pass-Through Mode

	Set SWF
To Set A Pause of	7	8
50 milliseconds	ON	ON
100 milliseconds	OFF	ON
500 milliseconds	ON	OFF
1.5 seconds	OFF	OFF

If you choose CTS-to-DTR Pass-Through, CTS (Pin 5) and DTR (Pin 20) are passed straight through the Switch. The next table shows how the DTE or DCE setting of the port affects the pass- through option:

NOTE: If the internal buffer fills, the appropriate

		CHAPTER 3: Installation
Master	Slave	Leads Passed
DTE	DTE	Master CTS to slave DTR
		Slave CTS to master DTR
DTE	DCE	Master CTS to slave CTS
		Slave DTR to master DTR
DCE	DTE	Master DTR to slave DTR
		Slave CTS to master CTS
DCE	DCE	Master DTR to slave CTS
		Slave DTR to master CTS

control lead (DTR or CTS) will be dropped to prevent data loss.

If you select Normal Operation, DTR (Pin 20) and CTS (Pin 5) are used strictly for buffer control. They are not passed straight through the Switch.

DCD-to-RTS Pass-Through Mode
To Set This Mode	Set SWC 8
CTS-to-DTR Pass-Through	ON
Normal Operation	OFF

If you select DCD-to-RTS Pass-Through, DCD

(Pin 8) and RTS (Pin 4) are passed straight through the Switch. The next table shows how the DTE or DCE setting of the port affects the pass-through option:

If you select Normal Operation, DCD and RTS are

Master	Slave	Leads Passed
DTE	DTE	Master DCD to slave RTS
		Slave DCD to master RTS
DTE	DCE	Master DCD to slave DCD
		Slave RTS to master RTS
DCE	DTE	Master RTS to slave RTS
		Slave DCD to master DCD
DCE	DCE	Master RTS to slave DCD
		Slave RTS to master DCD

always asserted. They are not passed through the Switch.

To Set This Mode	Set SWF 3
DCD-to-RTS Pass-Through	ON
Normal Operation	OFF

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