Black Box 25522 - Manual (Page 2)

2 of 2 5/10/2007
#25522 724-746-5500 blackbox.com
FEATURES
• Connect DS-3 equipment to DSX
systems.
• 100% tested to Bellcore GR-139-CORE
specifications.
• UL Listed.
• Delivers low attenuation; suitable
for indoor or outdoor use.
OVERVIEW
This cable is designed specifically for interconnecting DS-3
(44.736-Mbps) transmission equipment, such as multiplexors
or lightwave systems, and Digital Signal Cross-Connect (DSX)
systems. The cable also connects digital radio to multiplexor, or
between two patch panels, transmitters, receivers, or telephone
switches.
DS-3 cable is 100% tested to Bellcore GR-139-CORE
specifications. The cable also features small-diameter solid bare
or silver-plated copper conductors. It’s UL Listed to NEC and CEC
Type CMR, and it passes both UL
® 1666 and CSA FT-4 flame tests.
Also, the cable delivers low attenuation at all standard
frequencies and is suitable for both indoor or outdoor use.
TECH SPECS
Attenuation (Maximum) — 2.5 dB/100 ft., 22.368 MHz
Capacitance (Nominal) — 17.7 pF/ft. (conductor to shield)
Delay (Nominal) — 1.34 nsec/ft.
Impedance (Nominal) — 75 ohms
Outside Diameter — 0.399" (1.01 cm)
Resistance (Nominal, @ 68°F/20°C) — Conductor: 41 ohms/1000 ft.;
Shield: 5.3 ohms/1000 ft.
Return Loss (Minimum) — 30 dB, 15 to 90 MHz
Velocity of Propagation — 76%
Item Code
6-Conductor DS-3 Coax Cable PVC ETN6DS3-1000
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 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.
Why Buy From Black Box? Exceptional Value.
Exceptional Tech Support. Period.