1
Asynchronous, full or
half-duplex operation.
Provides transformer
isolation and surge
protection.
Data rates up to
19.2 kbps.
Use in point-to-point
or multipoint
environments.
Transmission range up
to 2.2 miles (3.5 km).
Select DTE, DCE, or
printer support mode.
No AC power required.
RJ-11 models have an
LED indicator for
carrier detection.
U
se the Miniature Short-Haul
Modem NPR for connecting full
or half-duplex asynchronous
DTEs to DTEs operating over
unconditioned 4-wire lines. This
short-haul modem ensures
integrity of data transmission for
distances up to 2.2 miles (3.5 km),
depending on wire gauge and
data rate. (Reach 2.2 miles
[3.5 km] at 9600 bps or 1 mile
[1.6 km] at 19.2 kbps—in both
cases, over 24 AWG wire.)
What makes these modems
stand apart from the crowd is that
they offer surge protection and
transformer isolation. Surge
protection guards your equipment
RCV
XMT
G
This tiny modem plugs directly
into an async DTE’s DB25 port.
Key Features
MINIATURE SHORT-HAUL MODEM NPR
from damage caused by surges,
brownouts, or spikes in electricity.
Isolation transformers protect
against AC or DC overvoltages.
The modems also have an
internal filter that provides high
noise immunity by reducing
radiated and conducted
interference.
You can even connect DCEs
or printers to the modem. The
modem has a 3-position slide
switch that selects DTE, DCE, or
printer support mode.
The modem requires no
external power since it uses
power from the interface’s data
and control signals.
Clear, crisp, communication is
provided, with minimal crosstalk.
Models are available with
RJ-11 or RJ-45 connectors and
DB25 male or female connectors.
Plus, all models also have a
5-screw terminal block connec-
tor. The RJ-11 models have an
LED that indicates Carrier Detect
(CD).
Two point-to-point applica-
tions are common: PC to PC and
PC to printer. Or, create a multi-
point configuration to connect
one computer to a several PCs
(see the diagram on the next
page). You’ll need one modem for
each attached device.
Black Box Corporation
• 1000 Park Drive • Lawrence, PA 15055-1018 • Tech Support: 724-746-5500 •
www.blackbox.com
•
e-mail: [email protected]
© 2005. All rights reserved.
Black Box Corporation.
7/26/2005
#20974
