Place any combination of up to 14 copper
and fiber optic modules in this
powerhouse rack!
RackNest 2/14
© 2007. All rights reserved. Black Box Corporation.
FREE 24-hour Tech Support: 724-746-5500
blackbox.com
Place any combination of up to 14 copper
and fiber optic modules in this
powerhouse rack!
2 of 5
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#19273
724-746-5500 blackbox.com
FEATURES
• Allows hot-swapping of cards and
power supplies.
• Houses fiber optic and copper-wire
modems in a single nest.
• High-density 19" modem rack.
• Compact! Only 4U high.
• Order second power supply for
redundancy.
• Works with balanced and unbalanced
G.703 equipment.
• 11 cards to choose from.
• Easy to install and operate.
LEDs inform you of card status.
An example of card connections on the RackNest 2/14’s rear panel.
OVERVIEW
Sometimes space is so limited that you can’t even find room
for your modems. So rack ’em! The BLACK BOX
®
RackNest 2/14
is your space-saving solution.
The RackNest 2/14 is a 19-inch, 4U-high rackmount modem
card nest that can house up to 14 plug-in cards. The rack is a
reliable concentration point for multiple baseband links
supporting last-mile or campus applications.
Simply choose the speed, operation, and interface you need.
For extra versatility, the cards are available in V.35, RS-232,
RS-530, or X.21 interfaces (see pages 3–5 for our selection of
rack cards). Install any combination of up to 14 copper and
fiber optic cards.
The cards slide into edge connectors inside the rack and are
secured by a nut. The rear panel consists of fourteen 5-screw,
snap-type terminal blocks and fourteen DB25 connectors (one
terminal block and one DB25 connector per card). The terminal
blocks connect the transmit and receive lines. The transmit pair
is connected to the terminals marked XMT, the receive pair
is connected to the terminals marked RCV, and an optional
ground connection is the fifth screw. The DB25 connectors are
interface connectors, and they provide all interface signals for
the digital interfaces. However, modem cards with an X.21 or
V.35 interface require an external mechanical adapter.
Hot-swap cards at any time during operation—remove
and reinsert them without interfering with other modem cards
and their data transmission.
The RackNest 2/14 works with balanced or unbalanced
G.703 equipment. Unbalanced interfaces use only one transmit,
one receive, and one ground lead in contrast to balanced
interfaces, which use a pair of transmit and receive leads.
The RackNest 2/14 includes one 115-VAC or 230-VAC power
supply. Plus, you can order a second, backup power supply.
And all the hot-swapping’s not just for modem cards—
check out our RM110A-2PS model. It’s the real powerhouse
RackNest! The RM110A-2PS accommodates two 115-VAC Power
Supplies. Each power supply supports 14 modem cards, regardless of their line type. And, like the cards themselves, the power
supplies are hot-swappable during operation, so there’s no
effect on the modems and their data transmission.
Having the RM110A-2PS is like having insurance for your
communications. In the event one power supply fails, the
second kicks in—and the data continues to go through for
all your cards.
The Rack Nest 2/14 is easy to install into a rack. To operate
its one or two power supplies, simply plug one or both into the
RackNest 2/14 and press the operating switch on the RackNest’s
rear panel. The On LED confirms the RackNest 2/14 is receiving
power.
Terminal block plus BNC
adapter (ordered separately)
for unbalanced E1
Protective hood— which you would
remove temporarily to make balanced
T1/E1 connections, permanently to make
unbalanced E1 connections
The RackNest 2/14 can serve as host to 1 or 2
power supplies and up to 14 plug-in cards of any
compatible type.These cards communicate with
two sets of connectors on the rack’s rear panel.
Shown at left is how you’d connect a T1/E1 Fiber
Optic Line Driver (T1/E1 FOLD) Card. For each
card, a snap-in 5-position terminal block handles
balanced T1 or E1 communication and a DB25
female connector handles dry-contact alarms.
(To support unbalanced E1,you would need a
special adapter with BNC female connectors
for each card. Call Tech Support for details.)
The terminal block has two XMT terminals for
the transmit pair of balanced T1/E1 wires and
two RCV terminals for the receive pair of wires,
plus a terminal for an optional ground
connection.
Terminal block—top terminal
ground (GND, optional),2nd and
3rd terminals receive (RCV), 4th
and 5th terminals transmit (XMT)
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19.2-kbps Async/Sync Card (ME760C)
• Sends RS-232 data over 24 AWG wire up to 4 miles
(6.4 km) at 19.2 kbps or up to 15 miles (24.1 km) at
1200 bps!
• Differential diphase modulation eliminates line
distortion and provides clean transmissions.
• Runs sync or async, point-to-point or multipoint.
• Operates half-duplex over two wires or full or halfduplex over four wires.
• V.54 diagnostics perform local and remote loopback
tests.
Here’s your long-distance solution for point-to-point or
point-to-multipoint RS-232 applications—the 19.2-kbps
Async/Sync Card. It provides clean, clear data transmission up
to 4 miles (6.4 km) at 19.2 kbps and an astounding 15 miles
(24.1 km) at 1200 bps. And best of all, it achieves these
substantial distances over ordinary unconditioned phone
lines!
Because this card can cover such long distances over
standard twisted-pair wires, it’s especially well-suited for
campus-wide, building-to-building, or base-to-satellite RS-232
networks. It also works well in retail sales applications (with
credit card verifiers, for instance) and shipping applications
like cargo weigh stations on interstate highways.
To manage these distances and speeds, the card uses
conditioned differential diphase modulation, a process that
immunizes the line against background noise and eliminates
the signal distortion common over twisted-pair cable.
Additionally, this card is joined to the line through dedicated
isolation transformers that protect against damaging AC or
DC overvoltages.
It‘s versatile, too. It operates at both sync and async in halfand full duplex mode. (Note that line transmission is always
synchronous. The card, when set to async mode, converts
async data to sync data in accordance with the ITU V.14
async-to-sync conversion standard.)
You can perform local analog loopback as well as local
and remote digital loopback tests with the card’s V.54
diagnostic capabilities.
In digital loopback mode, the modem can be tested from
either end of the line. These tests are controlled either
through pushbuttons or Pins 18 and 21. You can also insert
a delay into the data stream so that loopback tests are not
carried across your network.
You can choose from eight selectable data rates up to
19.2 kbps for both point-to-point and multipoint applications.
Async/Sync 2-Wire SHM Card (ME375C-232)
• Sends RS-232 data over 24 AWG wire up to 4 miles
(6.4 km) at 19.2 kbps.
• Transmits async data up to 115.2 kbps and sync data
up to 128 kbps using 2B1Q line coding.
• Adaptive equalizer provides noise immunity and high
performance over low-quality lines.
• Full diagnostics include internal BERT and local and
remote loopbacks.
• Transmits at over 3 miles (4.8 km)— even at maximum
speeds!
• 2-wire, twisted-pair operation.
• Single async/sync channel.
• Full duplex operation using echo cancellation.
The Async/Sync 2-Wire SHM Card runs at amazing speeds:
Async data goes 115.2 kbps while sync data travels up to 128
kbps. You get this astounding data rate even at this modem’s
maximum distance of 3.4 miles (5.5 km) over your existing,
inexpensive, 2-wire, twisted-pair lines! Full duplex over only
two wires is possible because of the adaptive echo-canceling
technique.
Perform diagnostics on local analog loopback as well as
local and remote digital loopback. You can test both modems
and the line at either end when you’re in the digital loopback
mode. And you can control the loopbacks via a manual switch
or through the DTE interface.
The Async/Sync 2-Wire SHM Card incorporates interface
circuits for the terminal or computer, an adaptive echocanceler, an automatic adaptive equalizer, a modulator, and
a demodulator. The adaptive equalizer provides noise
immunity and high performance over low-quality lines.
The SHM card can also be used to operate full duplex over
one pair of dedicated telephone lines. Full duplex operation
uses echo cancellation. Set one modem to be a master and
the other to be a slave.
The cards are coupled to the line through an isolation
transformer, which protects against AC or DC overvoltages.
The protection circuitry enables the units to survive even if
DC is accidentally connected to the line.
CARDS AVAILABLE FOR THE RACKNEST 2/14:
NOTE: All cards must be used in pairs.
724-746-5500 blackbox.com
MT650C-R2
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Sync SHM Cards (ME270C-530-R2, ME275C-35-R2,
and ME275C-X21-R2)
• Super-high speeds for your point-to-point applications—
up to 2.048 Mbps.
• Transmit data at T1 speeds, without installing T1 lines.
• Transmission range up to 1.1 miles (1.8 km).
• Choice of cards for extending balanced or unbalanced
G.703 interface on line side.
• Full duplex transmission over 4 wires.
• Selectable Forward Error correction for rates up to
1.024 Mbps.
It’s tough to keep your file transfers, bridging, and heavy
data traffic moving at a steady pace. If you want your data
to go fast, one of these Sync SHM Cards gets things moving!
The cards move data up to 2.048 Mbps, increasing your
network speed in some cases by as much as 33%. They’ll help
eliminate traffic jams, increase file-transfer times, and enable
your network bridges to work at their true full speed. Your
mainframes will trade data faster than ever. And your network
users will spend less time waiting for big files to download.
These cards are also ideal for CAD users with large graphics
files—transmitting faster than a T1 line.
The cards operate full duplex over unconditioned lines at
13 user-selectable data rates up to 2.048 Mbps. You can also
select the transmission baud rate on the link.
Transmit and receive timing can be provided internally or
derived externally from the data terminal or receive signal.
The cards also have FIFOs for jitter attenuation or phase
difference correction either from the incoming analog signal
on the line side or from the external clock on the DTE side.
V.54 diagnostic capabilities enable you to perform local
analog loopback as well as local and remote digital loopback.
The SHM cards also include an internal pseudo-random pattern
generator along with a basic error rate tester (BERT) to ensure
complete end-to-end integrity. If a bit error is detected, an LED
alerts you.
Built-in isolation transformers and protection circuitry
protects the cards and any attached DTE from line hazards
such as AC or DC overvoltages.
Async/Sync 144-kbps SHM Cards (ME445C-35
and ME445C-530)
• Selectable speeds range up to 144 kbps.
• Built-in BERT supports V.54 loop diagnostics.
• Includes conditioned diphase modulation.
• Runs full or half-duplex over unconditioned lines.
• Efficient transmission and reception of serial data
over a twisted-pair cable.
• Two types of interfaces available: V.35 and RS-530.
Also named LDM-MR144, these cards support transmission
speeds of 144 kbps at up to 3 miles (4.8 km). They achieve even
longer distances at slower speeds. Specifically, the cards
operate at user-selectable data rates from 19.2 to 144 kbps.
You can use the cards in either full or half-duplex applications.
A built-in BERT tests both the line drivers and the line.
An ERROR LED flashes when a bit error is detected.
With the cards, your data is safe, too, thanks to conditioned
diphase modulation. This feature not only provides background
noise immunity, but it gives you efficient data transmission and
reception and eliminates normal line distortion.
As a bonus, the cards include V.54 diagnostic capabilities
for local analog loopback and local and remote digital loopback testing.
Transmit timing is provided internally, derived externally
from the PC or terminal, or regenerated from the receive
signal.
724-746-5500 blackbox.com
ME760C
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T1/E1 Fiber Optic Line Driver (MT650C-R2)
• Drive data at full T1 or E1 speed over fiber.
• Maximum distances up to 3.1 miles (5 km) of multimode
cable or 23.6 miles (38 km) of single-mode cable.
• Optical link is immune to EMI/RFI, surges, taps, and
ground loops.
•ST
®
connectors.
Would you like to put your high-speed computer or other
DTE device in a different room from your T1 or E1 CSU/DSU?
In a different building? A different campus? Or would you just
like to make a connection at T1 or E1 speeds without handing
your entire budget to a telco for a subscription to T1 or E1
service?
Pairs of these T1/E1 Fiber Optic Line Drivers (T1/E1 FOLDs)
can pass data to each other at full T1 or E1 speed across multimode or single-mode fiber optic cables. Not only does this solve
device-placement problems, it does so with optical links that
aren’t susceptible to tapping, noise, and other hazards of
electrical communication.
The T1/E1 FOLD transmits and receives data on the 1300-nm
wavelength into as much as 23.6 miles (38 km) of single-mode
cable. It has common ST
®
type connectors.
You can set the FOLD to use a 100-Ω balanced T1 interface,
a 120-Ω balanced E1 interface, or a 75-Ω unbalanced E1
interface. The balanced interfaces on the cards are expressed
on the RackNest’s 5-position terminal blocks. For the
unbalanced interface, you’ll need a special adapter (call us
for ordering details).
724-746-5500 blackbox.com
TECH SPECS
Number of Slots — 14 slots for cards
Connectors —
Line: (14) 5-screw, snap-type terminal blocks;
DTE: (14) DB25 F connectors
Operating Temperature — 32 to 122°F (0 to 50°C)
Humidity — 10 to 90%, noncondensing
Power — RM110A: 115-VAC (±10%), 47–63 Hz;
RM110AE: 230 VAC (±10%), 47–63 Hz;
RM110A-2PS: (2) 115-VAC power supplies (one main and one
redundant), 47–63 Hz
Size — 7"H x 19"W x 10.4"D (17.8 x 48.3 x 26.4 cm)
Item Code
First, choose a rack with your system’s voltage…
RackNest 2/14
115-VAC RM110A
230-VAC RM110AE
RackNest 2/14 with Dual Power Supplies
115-VAC RM110A-2PS
Then order backup power supplies you may need…
Power Supply
115-VAC PS1000A
230-VAC PS1000AE
Next, order up to 14 cards to populate the rack…
Async/Sync Card, 19.2 kbps
RS-232 ME760C
Async/Sync 2-Wire SHM Card
RS-232 ME375C-232
Async/Sync 144-kbps SHM Cards (LDM-MR144)
V.35 ME445C-35
RS-530 ME445C-530
Sync Cards
Balanced G.703 Interface on Line Side, 2.048 Mbps
RS-530 ME270C-530-R2
Unbalanced G.703 Interface on Line Side, 2.048 Mbps
V.35 ME275C-35-R2
X.21 ME275C-X21-R2
T1/E1 Fiber Optic Line Driver (T1/E1 FOLD), ST
1300-nm Single-Mode MT650C-R2
To connect the V.35 or X.21 cards, you need…
V.35 Adapter FM150-R2
X.21 Adapter FM151
NOTE: Each adapter supports two cards.
For optimum performance and a 20% savings, order…
CAT5 Solid-Conductor Bulk Cable, 2-Pair, PVC,
Custom Lengths EYN717A
NOTE: Other lengths and plenum cable available.
Call Tech Support.
RS-232 Cable, 25-Conductor, 10-ft. (3-m) ECM25C-0010
NOTE: Other lengths available. Specify gender when ordering.
RM110A
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