Black Box MAY 1994 Manual de usuario

1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746

MAY 1994

ME600A-F

ME600A-FST

ME600A-M

ME600A-MST

Async Fiberoptic Modem

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 724-746-0746

Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018

Web site: www.blackbox.com • E-mail: [email protected]

Data

TX RX

Data

TX RX

FCC AND IC STATEMENTS

FEDERAL COMMUNICATIONS COMMISSION

AND INDUSTRY CANADA

RADIO FREQUENCY INTERFERENCE STATEMENT

This equipment generates, uses, and can radiate radio

frequency energy and if not installed and used properly,

that is, in strict accordance with the manufacturer’s

instructions, may cause interference to radio commun-

ication. It has been tested and found to comply with the

limits for a Class A computing device in accordance with

the specifications in Subpart J of Part 15 of FCC rules,

which are designed to provide reasonable protection

against such interference when the equipment is

operated in a commercial environment. Operation

of this equipment in a residential area is likely to cause

interference, in which case the user at his own expense

will be required to take whatever measures may be

necessary to correct the interference.

Changes or modifications not expressly approved by the

party responsible for compliance could void the user’s

authority to operate the equipment.

This digital apparatus does not exceed the Class A limits for

Radio noise emission from digital apparatus set out in the

Radio Interference Regulation of Industry Canada.

Le présent appareil numérique n’émet pas de bruits

radioélectriques dépassant les limites applicables aux appareils

numériques de la classe A prescrites dans le Règlement sur le

brouillage radioélectrique édicté par Industrie Canada.

ASYNC FIBEROPTIC MODEM

1. Specifications

Protocol — Asynchronous

Speed — Up to 19,200 bps

Operation — Full or half-duplex over duplex

optical cable

Diagnostics — None

Interface — RS-232C/V.24

Connectors — Both models have (2) SMA optical

connectors and (1) RS-232C connector as follows:

ME600A-F: (1) DB25F (female)

ME600A-M: (1) DB25M (male)

Pulse Width Distortion — Less than 25%

Optical Output Levels — -30 dBm into

100/140 fiber, -36 dBm into 50/125 fiber

Receiver Sensitivity — -45 dBm

Operating Wavelength — 820 nm

CHAPTER 1: Specifications

Operating Range — Maximum range is 2 miles

(3 km) when the following fibers are used:

100/140 fiber with attenuation of 4 dB/km

or 50/125 fiber with attenuation of 3 dB/km

Temperature — 32° to 122°F (0° to 50°C)

Humidity — Up to 95% non-condensing

Power — Derived from the RS-232C interface;

no external power required

Size — 0.9” H x 2.1” W x 4.0” D (2.4 x 5.3 x 10.2 cm)

Weight — 2.6 oz. (0.07 kg)

ASYNC FIBEROPTIC MODEM

2. Introduction

The Async Fiber Optic Modem is a full- or half-

duplex, asynchronous, point-to-point fiberoptic

modem. It sends an RS-232 signal over fiberoptic

cable. Power for the modem is derived from the

RS-232 interface. The RS-232 port is switch selectable

for DCE or DTE operation. You can set the carrier

for continuous operation, for switched operation,

or for control by the RTS signal. Models are available

with SMA or ST connectors. A typical application

is shown in Figure 2-1.

Async

Terminal

Fiber Optic

Cable

Async

Computer

Async

Fiber Drivers

Fig. 2-1. Typical Application.

CHAPTER 3: Installation

3. Installation

Follow these steps to install the Async Fiber Optic

Modem:

1. See Table 3-1 for the factory setting of the

Async Fiber Optic Modem. If the factory

settings are correct for your application,

skip to step 5. If the factory settings need

to be changed, go to step 2.

2. Remove the cover of the Async Fiber Optic

Modem by pressing in on the four tabs located

on each side of the unit and lifting the top half

of the cover from the bottom half.

ASYNC FIBEROPTIC MODEM

Table 3-1. Straps and Switch Settings

STRAP/ FUNCTION POSITION FACTORY

SWITCH SETTING

CARR Carrier ON ON

constantly ON

Controlled by CL

RTS

DLY RTS/CTS Delay 2 msec 2 msec

5 msec

DCE/ Modem is DCE DCE DCE

DTE Modem is DTE DTE

3. Set the straps and switch using Table 3-1

and Figure 3-1 as guides. If the device

connected to the Async Fiber Optic Modem

is a DCE, set the DCE/DTE switch on the

Async Fiber Optic Modem to DTE. If the

device connected to the Async Fiber Optic

Modem isa DTE, set the DCE/DTE switch

on the Async Fiber Optic Modem to DCE.

4. Align the top half of the cover with the bottom

half and press the two halves together to close

the unit.

CHAPTER 3: Installation

Fig. 3-1. Straps and Switch Locations.

5. Plug the RS-232 connector into the computer

or terminal port and fasten the connector with

its screwlocks.

6. Remove the plastic dust caps from the SMA

connectors of the Async Fiber Optic Modem.

Connect the fiber cables to the modems as

follows:

• Connect TX at the local modem to RX

at the remote modem.

• Connect RX at the local modem to TX

at the remote modem.

7. Repeat steps 1 through 6 for the modem

at the other site.

The Async Fiber Optic Modem is now ready

for operation.

DTE DCE

CARR DLY15

NOTES

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