Black Box Black Box network services, PSD-4, PSD-8 manual Stap Identity

				CHAPTER 3: Installation
	Table 1. Printed Circuit-Board Switch and Strap Settings
		Possible	Factory
Stap Identity	Location	Settings	Setting	Function
MAIN DCE/DTE switch		DTE	DTE	Determines the PSD’s Main Channel
		DCE		interface as either DTE (straight connection
				to a modem) or as DCE (straight connection
				to a computer or terminal).
Sub-channel		DTE	DTE	Determines the PSD’s sub-channel interface
DCE/DTE switches		DCE		as either DTE or DCE.
DATA RATE (kbps)	BR1	19.2	9.6	Selects the PSD’s internal data rate or external
(rotary switch)		14.4		clock from sub-channel 1.
		9.6
		7.2
		4.8		NOTE: When using CLK 1 mode, the main
		2.4		channel cannot be connected to a modem
		1.2		working in internal clock.
		CLK 1
Chas. GND	J1	CONNECT	DISCONNECT	The CONNECT setting connects signal ground
		DISCONNECT		to chassis ground. The DISCONNECT setting
				isolates them.
PIN 24 DIS	J1A	ENABLE	ENABLE	Exits main channel when PIN 24 is disabled.
		(jumpered)
		DISABLE
		(NO jumper)
TIME OUT	J2	1.7	108	Selects the time-out period (in seconds) after
		13.5		which the PSD will automatically disable the
		108		sub-channel. Selecting DISABLE will stop
		DISABLE		the PSD from automatically disabling any
				sub-channels.
CONTENTION	J5	RTS	RTS	Determines the sub-channel selection and
		DATA		deselection.
FORMAT	J6	ASYNC	SYNC	Selects the data format.
		SYNC
CLOCK	J7	NORMAL	NORMAL	Determines the source of the clock for
		FROM EXT DTE		synchronous data. Set to NORMAL for
				internally derived clock. Set to FROM EXT
				DTE for externally dermined clock from a
				connected DTE.
EXT. BUFFER	S1	ON	OFF	Activates or deactivates the extra buffer.
(PSD-8 only)	S2	OFF

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