Black Box Black Box network services, PSD-4, PSD-8 manual Specifications, Highest Priority

PSD-4 AND PSD-8

1. Specifications

Number of Sub-Channels —
PSD-4:	4
PSD-8:	8
Channel Configuration —
Lowest Priority:	Sub-channel 1
Highest Priority:	PSD-4: Sub-channel 4
	PSD-8: Sub-channel 8

Sub-Channel Selection — RTS/DCD on or data transitions (strap-selectable)

Sub-Channel Deselection — RTS/DCD off or 16 bits of idle data (strap-selectable)

Sub-Channel Dialing —

Manual:Press in the front-panel pushbutton switch

Automatic: If a sub-channel stays connected for more than a pre-set period of time (strap-selectable—1.7, 13.5, or 108), the PSD automatically disables it

Clock Source — Internal, external from main channel, or external from sub-channel 1

Data Rates —

Asynchronous:Up to 19.2 kbps

Synchronous:Internal Clock: 1.2, 2.4, 4.8, 7.2, 9.6, 14.4, or 19.2 kbps External Clock: Up to 19.2 kbps

Connectors — IEIA RS-232-C/CCITT V.24; DCE or DTE (strap-selectable)

Controls — Front-panel SUB-CHANNEL DISABLE pushbutton switch for each sub-channel; rear-panel POWER rocker switch; rear-panel 110/220 VAC selector

LED Indicators — POWER:	Lights when the unit is receiving AC power
DATA:	Lights when data is broadcast from the main channel
	to the sub-channels
ACTIVITY:	Lights when the sub-channel accesses the main channel
AUTOMATIC:	Lights when sub-channel has been automatically disabled

Temperature — 32 to 122°F (0 to 50°C)

Humidity — 30 to 90%, non-condensing

Power — 110/220 VAC switchable + 10%

Size — I1.7"H x 17"W x 8.2"D (4.3 x 43.1 x 20.8 cm)

Weight — 4.4 lb (2.0 kg)

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