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BLACK BOX
®
3 of 3
09/13/2011
#11110
What’s included
✦
The RS-232 Fallback Switch
✦
Detachable power cord
✦
Users’ manual
Recognize any of these situations?
• You wait more than 30 minutes to get through
to a vendor’s tech support.
• The so-called “tech” can’t help you or gives you
the wrong answer.
• You don’t have a purchase order number and the
tech refuses to help you.
• It’s 9 p.m. and you need help, but your vendor’s
tech support line is closed.
According to a survey by
Data Communi cations
magazine, 90%
of network managers surveyed say that getting the technical support
they need is extremely important when choosing a vendor. But even
though network managers pay anywhere from 10 to 20% of their
overall purchase price for a basic service and support contract, the
technical support and service they receive falls far short of their
expectations—and certainly isn’t worth what they paid.
At Black Box, we guarantee the best value and the best support.
You can even consult our Technical Support Experts before you buy if
you need help selecting just the right component for your application.
Don’t waste time and money—call Black Box today.
Why Buy From Black Box? Exceptional Value.
Exceptional Tech Support. Period.
SW901A
T e c h S P e c S
Compliance —
FCC Part 15, Class A; DOC Class/MDC classe A; CE
Compatibility —
Compatible with dialup modems using ITU-TSS V.34,
V.32 bis, V.32, and most other major modem standards
Data Format —
Transparent to data format
Data Rate —
Up to maximum rate supported by cabling
Distance (Maximum) —
50 ft. (15.2 m) to any attached RS-232 device using
standard cables
Flow Control —
Transparent to flow control, but monitors/ switches on DSR,
CTS, or RLSD (DCD); also passes or forces DTR
Leads/Signals Supported —
2 through 6, 8, 15, 17, 20 through 22, and 24 (TD, RD, RTS, CTS,
DSR, RLSD [CD], TSETC [TC], RSETC [RC], DTR, RI, and TSETT [EXTC]
respectively);
1 and 7 (PGND and SGND respectively) are tied common
User Controls —
(1) front-mounted toggle switch for selecting automatic/
primary/alternate; (4) internal configuration jumpers
MTBF —
180,000 hours
Interfaces —
EIA RS-232C, modular telco
Connectors —
(3) rear-mounted DB25 F: Common (master), primary,
and alternate ports
Indicators —
(2) front-mounted LEDs showing active channel (ALT/PRI)
Temperature Tolerance —
Operating: 32 to 122˚F (0 to 50˚C);
Storage: -4 to +158˚F (-20 to +70˚C)
Humidity Tolerance —
Up to 95% noncondensing
Enclosure —
High-impact ABS plastic
Power —
SW901A: 115 VAC, 60 Hz, through detachable power cord (included)
and internal power supply;
SW901AE 230 VAC, 50 Hz, through detachable power cord (not included)
and internal power supply;
Consumption (both models): 8 watts
Size —
2.5"H x 8"W X 12"D (6.4 x 20.3 x 30.5 cm)
Weight —
2.7 lb. (1.2 kg)
Item
Code
RS-232 Fallback Switch
115-VAC
sW901a
230-VAC
sW901aE
You may also need…
RS-232 Cable, 25 Conductors (121⁄2 Pairs)—Pins 1–25
(Specify gender and length)
ECM25C
