Black Box MT243A Manual, Specifications

1
Black Box Corporation • 1000 Park Drive • Lawrence, PA 15055-1018 • Tech Support: 724-746-5500 • www.blackbox.com • e-mail: [email protected]
Connects 75-ohm dual
coax to 120-ohm
twisted pair.
Performs conversion
for up to 16 ports.
Data rates up to 
2.048 Mbps.
Chassis mount in
standard 19-inch racks.
M
atch multiple sets of dual
75-ohm coax connections
to multiple 120-ohm twisted-pair
connections with these G.703
solutions.
Who needs these baluns?
Carriers that need to provide
120-ohm G.703 service for
customers retaining 75-ohm CPE
hardware. These baluns also
enable carriers who have
standardized on 75-ohm coax to

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Connect your 75-ohm equipment
to a 120-ohm G.703 network.
Key Features
BALUN MATE
10/7/2003 #20998
Ordering Information
ITEM CODE
Choose the complete solution…
Balun Mate ..................................................................MT243A
…or choose the chassis and buy as many modules as
you need… 
Balun Chassis .............................................................RM243A
Balun Module ..........................................................MT243C-F
provide 120-ohm terminations to
their customers (in keeping with
European ONP requirements).
If you need a lot of connec-
tions right away, order the Balun
Mate (MT243A)—you’ll get the
panel plus 16 installed balun
modules. Or you can order an
empty Balun Chassis (RM243A)
and add as many Balun Modules
(MT243C-F) as you need for your
application.
Supporting E1 data rates of
up to 2.048 Mbps, the panels bi-
directionally match not only signal
impedance, but also the pulse
shapes of the signals according
to the ITU G.703 standard. Also,
no AC power or batteries are
required.
The Balun Mate and Balun
Chassis are designed to occupy
only 2U in a standard 19-inch
(48.3-cm) rack.
Link-to-Data Isolation: 
500 volts AC/DC
Speed: 2.048 Mbps
Transmission Line: 
G.703 (unstructured)
Connectors: 
75-ohm: Dual coax BNC F; 
120-ohm: Shielded RJ-45 jack 
(internal terminal block 
included)
Temperature Tolerance: 32 to 122°F
(0 to 50°C)
Power: From the interface
Size: RM243A: 3.5"H (2U) x 19"W x
1.9"D (8.9 x 48.3 x 4.8 cm)
Weight: MT243A: 2.5 lb. (1.1 kg);
RM243A: 1.1 lb. (0.5 kg);
MT243C-F: 0.1 lb. (<0.1 kg)
Specifications
© 2003. All rights reserved.
Black Box Corporation.

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