Black Box ME260A User manual

Incompatible interfaces? No problem.
Plug-in modules make the right connection.
Incompatible interfaces? No problem.
Plug-in modules make the right connection.
Modular Modem Eliminator
© 2007. All rights reserved. Black Box Corporation.
FREE 24-hour Tech Support: 724-746-5500
blackbox.com

2 of 3
6/22/2007
#20929
724-746-5500 blackbox.com
FEATURES
• Interface converter, modem eliminator,
and elastic buffer—in one compact unit!
• Supports RS-232, V.35, X.21, RS-422/
RS-449, and G.703 interfaces.
• Field-replaceable interface modules.
• DCE/DTE switch for each module (except
for G.703 interface).
• Speeds to 2.048 Mbps.
• Supports three G.703 standards—64-
kbps, T1, and E1.
Connect two CPUs with the ME260A and two interface modules.
OVERVIEW
The Modular Modem Eliminator (ME260A) connects any
two data-communications products with similar or different
interfaces. It functions in three ways: as an interface converter,
as a modem eliminator, and as an elastic buffer. A handy
switch enables you to select the mode of operation.
• As an interface converter, the unit enables you to connect
DTE to DCE with different interfaces. It converts the
physical and electrical difference between the two
interfaces.
• As a modem eliminator, the unit eliminates the need for
two synchronous modems. It enables you to connect two
DTEs with similar or different interfaces. The converter
provides clock, and performs handshaking of control
signals, simulating modem operation.
• As an elastic buffer, the unit enables you to connect
two independently clocked DCEs. It buffers data in both
directions to overcome different clock phases and reduce
data loss for different clock sources. The two DCEs may
have similar or different interfaces.
• The Modular Modem Eliminator runs at data rates up
to 2.048 Mbps using internal or external clocking. A
complete system consists of the Modular Modem Eliminator
and two Interface Modules of your choice.
• General-purpose interface modules are available for RS-232,
V.35, X.21, RS-422/RS-449, and G.703 interfaces.
• G.703 interface modules are available for 64-kbps DB15,
2.048-Mbps Coax, and 1.544-Mbps T1.
Modular Modem Eliminator (ME260A)
with V.35 and X.21 Interface Modules
(ME262C–ME263C)
56-kbps, X.21 Lines
CPU CPU
TECH SPECS
Buffer Size — 2 buffers, 256 bits each
DCD — Selectable to be continuously on or controlled by the RTS signal
Operation — Half- or full duplex
Protocol — Synchronous
RTS/CTS Delay — Selectable to 0, 6, or 53 msec for each DTE
Speed (Maximum) — 512 kbps using internal clock, 2.048 Mbps using
external clock
User Controls — (1) 12-position (0–9, A–B) Rate selection (48 kbps to
2.048 Mbps) switch
Connectors — ME261C: (1) DB25 F;
ME262C: (1) M/34 F;
ME263C, ME268C: (1) DB15 F;
ME265C: (1) DB37 F;
ME268C: (1) coax F
Indicators — (8) LEDs: PWR, TD-1, RD-1, TD-2, RD-2, Int. Conv., Elastic
Buffer, Modem Elimin.
Power — 115 VAC, 60 Hz ± 10% (wallmount), 5 watts
Size — ME260A: 1.7"H x 10.5"W x 9.6"D (4.3 x 26.7 x 24.4 cm);
Interface modules: 2.7"H x 0.1"W x 3.9"D (6.9 x 0.3 x 9.9 cm)
Weight — ME260A: 4.1 lb. (1.9 kg);
Interface modules: 0.2 lb. (0.1 kg)

3 of 3
6/22/2007
#20929
724-746-5500 blackbox.com
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.
ME260A
Item Code
First, order the chassis…
Modular Modem Eliminator ME260A
…next, order two interface modules.
RS-232 ME261C
V.35 ME262C
X.21 ME263C
RS-422/RS-449 ME265C
G.703
DB15 ME266C
Coax Female ME267C
T1 ME268C
For optimum performance and a 20% savings, order…
RS-232 Cable, 25-Conductor, 10-ft. (3-m) ECM25T-0010
V.35 Interface Cable, 10-ft. (3-m) EYNT450-0010
X.21 Cable, 3.2-ft. (1-m), Male/Male EVNX21-001M-MM
Coax Cable, RG-59 PVC (CL2), 10-ft. (3-m) ETN59-0010-BNC