Black Box MAY 1994 User manual

1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax [phone]
© Copyright 1994. Black Box Corporation. All rights reserved.

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 [phone]
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

1
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.

2
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

3
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)

4
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.

5
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.

6
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.

7
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
ON
CL
CARR DLY15
2

NOTES