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6/6/2007
724-746-5500
#22457
TECH SPECS
Maximum Distance — Up to 3000 ft. (914.4 m) on 2-twisted-pair cable
(24 AWG)
Multiplexing Technique — Time division
Operation — Full-duplex
Protocol — Async
Speed — 38887: Up to 64 kbps per port; 38889: Up to 38.4 kbps per port;
38891: Up to 19.2 kbps per port
Indicators — LEDs: (1) Power, (1) RXD, (1) Sync
Interface — Channel: RS-232; Composite: 4-wire terminal block
Connectors — Channel: 38887: (4) RJ-45; 38889: (8) RJ-45;
38891: (16) RJ-45; Composite: (1) 4-screw terminal block
Temperature — Operating: 50 to 120°F (10 to 49°C);
Storage: -40 to +149°F (-40 to +65°C)
Power — 115-VAC, 60-Hz external power supply
Size — 38887, 38889: 1.7"H x 7"W x 5.3"D (4.3 x 17.8 x 13.5 cm);
38891: 2.2"H x 7"W x 5.3"D (5.6 x 17.8 x 13.5 cm)
38891
Weight — 38887: 2.5 lb. (1.1 kg)
Why Buy From Black Box? Exceptional Value.
Exceptional Tech Support. Period.
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.
blackbox.com
Item
Asynchronous Local RS-232 Muxes
4-Port
8-Port
16-Port
You may also need to order modular adapters...
DB25 Male/RJ-45 for DTE
DB25 Male/RJ-45 for DCE
DB9 Female/RJ-45 for DTE
DB25 Female/RJ-45 for DTE
And don't forget to order cable...
Category 5 Twisted-Pair Cable
RJ-45 (8-Wire) Modular Cable
According to a survey by Data Communications
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.
Code
38887
38889
38891
523951
523953
523954
523952
EYN737A
EL08-MS
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