Black Box MC140A, MC141A, MC144A, MC145A, MC142A Quick Start Manual

SEPTEMBER 1996
MC140A MC144A
MC141A MC145A
MC142A MC146A
MC143A MC147A

RF Filters

CUSTOMER SUPPORT INFORMATION

Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX
FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax [phone]
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [e-mail]

2

RF FILTERS

Specifications

Number of Lines —

For single-line phones:

MC140A, MC141A, MC142A, MC143A;

For two-line phones:

MC144A, MC145A, MC146A, MC147A

Frequency Range —

MC140A, MC144A: 0.5 to 3 MHz
MC141A, MC145A: 3 to 30 MHz
MC142A, MC146A: 26 to 60 MHz
MC143A, MC147A: 100 MHz

Attenuation (Nominal) — 50 dB

Connectors — One-Line models: (1) male,

(1) female RJ-11;

Two-Line models: (1) male, (1) female RJ-14

Power — None required

Size — 2.25"L × 0.8"H × 0.75"D

(5.7 × 2 × 1.9 cm), with 5-inch (12.7-cm) cord

attached

Weight — 0.9 oz. (26 g)

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RF FILTERS

Installation

Installing an RF Filter is as easy as plugging in
a phone.

1. Unplug the line cord (the cord that goes
to the wall outlet) from the back of your
telephone.

2. Plug the cord on the end of the RF Filter
into the line-cord input on the telephone.

3. Plug the line cord into the RF Filter.

That’s all—the filter is installed.

If you still hear interference on your phone, you
might need filters in other places in your phone
system. Call Black Box Technical Support at
724-746-5500 for advice; we might be able to give
you a quote on RF noise filters for other locations
on your phone lines.

For more information on telephone interference,
call our FaxBack system, also at 724-746-5500,
and order Document Number 17099.

1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax [phone]

© Copyright 1996. Black Box Corporation. All rights reserved.