Black Box ME260A Manual de usuario

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

FREE 24-hour Tech Support: 724-746-5500

blackbox.com

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6/22/2007

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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

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