IC051_NOV98
NOVEMBER 1998
IC051
IC056
IC077A
IC078A
3270 Repeater — Fiber
3270 Repeater — UTP
3270 Repeater — Fiber RJ45
3270 Repeater — UTP RJ45
3270 RE
3270 RE
CUSTOMER
SUPPORT
INFORMATION
PEATER
PEATER
-FIBER
-UTP
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]
3270 REPEATER-FIBER/3270 REPEATER-UTP
FEDERAL COMMUNICATIONS COMMISSION
RADIO FREQUENCY INTERFERENCE STATEMENT
This equipment generates, uses, and can radiate radio frequency energy
and if not installed an used properly, that is, in strict accordance with the
manufacturer's instructions, may cause interference to radio communication.
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 required 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 broillage radioélectrique édicté par Industrie Canada.
2
3270 REPEATER-FIBER/3270 REPEATER-UTP
Contents
1. Specifications .................................................................................................4
2. Introduction ..................................................................................................5
3. Installation .....................................................................................................6
3.1 Pre-Installation Check.........................................................................6
3.2 Installing the 3270 Repeater-Fiber.....................................................6
3.3 Installation of the 3270 Repeater-UTP ..............................................7
4. Opertion and Troubleshooting....................................................................9
4.1 Normal Operation ..............................................................................9
4.2 Problem-Solving Checklist..................................................................9
3
3270 REPEATER-FIBER/3270 REPEATER-UTP
1. Specifications
Data Rate —
2.358 Mbps
Connectors —
IC051: (1) RJ-11 6-wire modular jack, (1) pair of
screw-type terminals; (2) AT&T ST-type connectors
IC056: (2) RJ-11 6-wire modular jacks, (2) pairs of
screw-type terminals
IC077A: (2) RJ-45 8-wire modular jacks set for
Pins 1 and 2; (2) pairs screw terminals
IC078A: (1) RJ-45 8-wire modular jack, (1) pair of
screw-type terminals; (2) AT&T ST-type connectors
Transmission —
Transparent to the user
Indicators —
(3) LEDs: (1) Power (green), (2) Line Sync (red)
Maximum
Distances —
System
Requirements —
IC051: Controller to Repeater, 1500 ft. (457.2 m),
Repeater to Repeater, 8200 ft. (2499.4 m), Repeater
to Workstation, 1500 ft. (457.2 m);
IC056: Controller to Repeater, 1500 ft. (457.2 m),
Repeater to Repeater, 2000 ft. (61 m), Repeater to
Workstation, 1500 ft. (457.2 m)
IBM® 3178, 3278, 3179, 3180-1, 3279, 3287, 3299,
and compatible terminals supported by IBM 3270
Power —
110-VAC or 220-VAC power supply
Size —
1.3"H x 8.5"W x 4"D (3.3 x 21.6 x 10.2 cm)
Weight —
2 lb. (0.9 kg)
4
CHAPTER 2: Introduction
2. Introduction
The 3270 Repeater-Fiber and
3270 Repeater-UTP are cascadable
repeaters which extend your fiberoptic or unshielded twisted-pair
cabling distance. The Repeaters can
be cascaded with other Repeaters
and other equipment. The 3270
Repeater-Fiber must be installed
in pairs.
The 3270 Repeater-Fiber lets data
be transmitted at distances up to
8200 feet (2499.4 m) over dual
fiberoptic cable. It also gives you
an extra 3000 feet (914.4 m) when
using unshielded twisted-pair cable.
The 3270 Repeater-UTP lets data
be transmitted at distances up to
3000 feet (914.4 m) between the
controller and the workstation
via unshielded twisted-pair cable.
Both models resynchronize and
reformat the data signal to provide
greater transmission distances. They
provide improved performance in
harsh electrical environments. Both
repeaters also come with optional
RJ-12 or RJ-45 pin configurations.
5
3270 REPEATER-FIBER/3270 REPEATER-UTP
3. Installation
Before installation, check to make
sure your Repeater was not damaged
during shipping. If there is any
damage, call your supplier.
When you install your Repeater, shut
off your workstation, controller, and
all other devices before you begin.
Place the Repeater on a flat, dry,
stable site with enough clearance
for all connections. It should be
installed within 6 feet (1.8 m) of
an AC outlet.
3.1 Pre-Installation Check
Check the following before installing
your repeater:
• Your cable must not have any
bridge taps. The wires of the
twisted pairs must not be
separated. Avoid using flat silver
satin cable, as this type of cable
is highly susceptible to external
interference, and may create
problems.
If you are using multipair cable,
avoid connecting multiple
services under the same sheath.
Use bulk cable 100 feet (30.5 m)
or longer.
• Verify that the wiring polarity
is straight-through between the
host and the workstations.
6
• Some brands of controllers
and terminals may require
DC-continuity between the host
and the workstation. The 3270
Repeaters have DC isolation and
might not work with this type
of equipment. Check with
your computer dealer for
more information.
• Avoid nearby sources of
electromagnetic interference
such as motors, transformers,
and fluorescent lighting.
3.2 Installing the 3270 RepeaterFiber
Follow these steps to install the
3270 Repeater-Fiber:
1.The 3270 Repeater-Fiber is
designed to operate in pairs.
One Repeater is installed at the
host side; the second is installed
at the station side. To protect
the connectors, do not remove
the fiberoptic covers until you
are ready to make the fiber
connections.
2.Connect the twisted-pair
segments as explained in
Steps 1-10 in Section 3.3.
Make sure that straight-through
polarity is maintained.
CHAPTER 3: Installation
3. Remove the fiberoptic covers
from the 3270 Repeater Fiber
and connect the ST fiber
connectors as indicated in
Figure 3-1, ensuring that TX
goes to TX and RX goes to RX.
Take care not to damage or get
dust on the exposed ends of the
fibers.
R
TIP
(T)
RING (R)
T
CTRL-TERM
SYNC
TX
SYNC
OPTIC LINK
POWER
RX
RT
R
RING (R)
T
R
OPTIC LINK
(T)
R
R
POWER
TIP
T
T
T
TIP (T)
CTRL-TERM
SYNC
TX
RING (R)
SYNC
RX
RT
R
T
T
R
R
T
RING (R)
TIP (T)
Figure 3-1. Installing the 3270 Repeater-Fiber.
3.3 Installation of the 3270
Repeater-UTP
Follow these steps to install the
3270 Repeater-UTP:
1.Select a location for the
Repeater. It may placed up to
1500 feet from the controller
and up to 1500 feet from the
terminal.
2.Distinguish between the tip and
ring leads on the balun leading
to your controller.
3.Plug the Repeater into the
nearest AC power outlet. The
green Power LED should light.
4.If you are using screw-type
terminals, strip 1/4 inch of
insulation from the end of
the twisted pair.
5.Connect the wires coming
from the controller to the
block marked CTRL, and
tighten the locking screws.
7
3270 REPEATER-FIBER/3270 REPEATER-UTP
6.Connect the wires coming from
the terminal block marked
TERM, and tighten the locking
screws.
Check that the tip and ring
leads of the balun near the
workstation are connected to
the tip and ring, respectively,
at the TERM block of the
3270 Repeater.
7.OR, if you are using modular
phone jacks, connect the cable
as shown in Figure 3-2. Use 24or 22-gauge unshielded twistedpair cable.
The 3270 Repeater is reversepolarity-sensitive.
9.Turn on the workstation and
the controller.
8.In both cases:
Check that the tip and ring leads
of the balun near the controller
are connected to the tip and
ring, respectively, at the CTRL
block of the 3270 Repeater.
10.When the 3270 Repeater is
properly connected, the CTRLSYNC and TERM-SYNC lights
will be on and flashing.
CTRL
POWER
TERM
SYNC
SYNC
RT
R
TIP
(T)
RING (R)
T
RT
R
T
T
R
R
T
Figure 3-2. Installing the 3270 Repeater-UTP
8
RING (R)
TIP (T)
CHAPTER 4: Operation and Troubleshooting
4. Operation and Troubleshooting
4.1 Normal Operation
Problem: All LEDs remain dim.
The LEDs indicate normal
operation. The green POWER LED
should glow, and the two red SYNC
LEDs should flash to indicate packet
transfers. The Repeater requires
little in the way of maintenance, and
can be expected to transfer data for
months, if not years, with little or no
attention.
• Check your AC plug and power
supply.
4.2 Problem-Solving Checklist
You may notice a change in the
performance of the Repeater for a
number of reasons. The checklist
below can eliminate some of the
common causes of trouble. When
you have tried all these solutions,
call your supplier.
CAUTION
Don't try to repair the 3270
Repeater yourself. There are
no user-serviceable parts
within the Repeater. If you
open the case, you may
harm yourself, damage your
equipment, or compound the
problem with your Repeater,
and you will also void the
warranty.
Problem: SYNC LEDs won't flash.
• Check your cable connections.
• Tighten any loose wiring on your
Repeater, your controller, and
your workstation.
• Make sure your baluns are in
working order.
• Check the polarity of your lines.
The Repeater is sensitive to
reversed polarities.
Problem: Noisy or corrupted data.
• Replace any bridged cables.
• If possible, replace any flat silver
satin cable with unshielded
twisted-pair cable. Flat silver
satin cable is vulnerable to
interference.
9
© Copyright 1998. Black Box Corporation. All rights reserved.
1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746
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