Use just two wires to extend Ethernet,
E1/T1, X.25, or V.35 networks and
achieve G.SHDSL performance!
Use just two wires to extend Ethernet,
E1/T1, X.25, or V.35 networks and
achieve G.SHDSL performance!
G.SHDSL Two-Wire Extender/NTUs
© 2007. All rights reserved. Black Box Corporation.
FREE 24-hour Tech Support: 724-746-5500
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FEATURES
• Deliver symmetrical high data rate
DSL (G.SHDSL) over 2-wire, voice-grade
copper wiring.
• Offer high data rates up to 4.6 Mbps.
• Line rates can be selected in 64-kbps
intervals.
• Select lower speeds for applications
requiring long distances, as far as
9.9 miles (15.9 km).
• Use existing wiring and avoid the
expense and trouble of procuring
and pulling new cable.
• Choose from 10BASE-T/100BASE-TX,
E1/T1, X.21, and V.35 interfaces.
• All versions are interoperable with
one another.
• Easy to manage and configure via
an RS-232 console port connection.
• Built-in testing and diagnostics with a
line probe that determines the optimum
rate supported on the DSL side.
• 10/100 version is ideal for Ethernet
bridging applications between a LAN
and a WAN.
• Once configured, operate transparently
without any further user intervention.
• Two-wire interface is a transformer
coupled with 2500-VRMS isolation.
• Front-panel LEDs for at-a-glance status
monitoring and troubleshooting.
OVERVIEW
Bring symmetric high-speed digital subscriber line technology to your network users without spending extra for
your cable infrastructure.
The BLACK BOX
®
G.SHDSL Two-Wire Extender/NTUs interface with Ethernet, T1/E1, X.21, or V.35 networks to extend
services point-to-point to remote users at speeds up to
4.6 Mbps in both directions. And the best part is, this higher
speed is possible over just two copper wires! Other G.SHDSL
solutions require four wires to reach similar speeds.
They’re not only ideal for any far-flung campus application
where you want to use existing infrastructure to extend your
network, but they’re also particularly great for ISPs or other
service providers who want to use G.SHDSL to expand their
customer base.
The units work in pairs, with one unit set as the central
office (CO) unit and the other as the customer premises (CP)
unit, and both set to communicate the same DTE rate. For DSL
interconnections, the G.SHDSL Two-Wire Extender/NTUs use
two-wire copper cable of any gauge from 19 AWG (0.9 mm)
to 26 AWG (0.4 mm).
Choose the speed appropriate for your application or the
demands of your users or customers. All extender/NTUs feature
configurable nx64 data rates. Of course, at lower speeds you
can extend the reach of your network a greater distance. The
extender/NTUs use Trellis Coded Pulse Amplitude Modulation
(TCPAM) that enhances the spectral compatibility with the DSL
line. Communicating across a single pair of regular twisted-pair
lines, a pair of extender/NTU units enables you to extend a
network or service more than twice as far as conventional TDM
technologies—up to 9.9 miles (15.9 km) over 19 AWG (0.9-mm)
wiring at 192-kbps rates.
You can achieve this by using lower-cost cable, such as the
telephone wiring that you probably already have running
between offices or buildings. Plus, there’s no need to buy and
install expensive DSLAMs or other DSL interface equipment
for your central office.
To set passwords and configure the units, use their DIP
switches and/or a software-controlled console (such as a
VT100
™
terminal) plugged into the RS-232 port on either the
local or remote end. The same DIP switches and/or console
connection are also used to set DSL speeds (and, on applicable
models, serial data rates) in 64-kbps increments up to
4608 kbps (4.6 Mbps).
The G.SHDSL Two-Wire Extender/NTUs also include a probe
to determine the best DSL data rate reliably supported by the
DSL link between local and remote units. In addition, a DSL
error monitor inspects the line for intervals that exceed its
user-set error threshold and, if necessary, restarts the link
automatically.
Once configured and connected to your local network
and the two-wire line, the G.SHDSL Two-Wire Extender/NTUs
operate transparently. For at-a-glance troubleshooting, simply
observe the front-panel diagnostic LEDs. On all models, the
Power LED lights during normal operation, and on most
models, the DSL LED lights when the unit establishes a DSL
link (on the Ethernet model, a Link LED signals a detected
link). There‘s also an indicator that tells you when a test mode
is in progress or when the extender/NTU detects an error. (See
Tech Specs for a full description of each model’s indicators.)
A choice of four interfaces.
You have four models to choose from, including one
with an Ethernet/Fast Ethernet interface, one with an E1/T1
interface, and two serial (V.35 or X.21) interface models.
All versions work with one another, which means that,
along with network or service extension, you can provide
interface conversion, too. Use, for instance, a V.35 model
at one end of a circuit and an E1/T1 model at the other end.
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#26567
724-746-5500 blackbox.com
Wire Gauge
Distance at 192 kbps Distance at 4.6 Mbps
26 AWG (0.4-mm) wire 4 mi. (6.4 km) 1 mi. (1.6 km)
24 AWG (0.5-mm) wire 5.3 mi. (8.5 km) 1.3 mi. (2.1 km)
22 AWG (0.6-mm) wire 6.6 mi. (10.6 km) 1.7 mi. (2.7 km)
19 AWG (0.9-mm) wire 9.9 mi. (15.9 km) 2.5 mi. (4 km)
Buyer’s Guide
Maximum Distances
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#26567
Extending an Ethernet network.
The 10BASE-T/100BASE-TX G.SHDSL Two-Wire Extender/
NTU (LB510A) has an RJ-45 interface for 10-/100-Mbps network
links and a G.SHDSL network termination unit (NTU) for
accessing IP services over the two-wire infrastructure. It’s unique
because it has both a built-in Ethernet port and TDM-based
G.SHDSL network access for maximized bandwidth.
Working as a low-cost customer premise equipment (CPE)
solution, the LB510A delivers long-range, dedicated, bridgedEthernet connections to distant users or customers running
bandwidth-intensive applications.
In an enterprise environment, you can use the 10BASE-T/
100BASE-TX G.SHDSL Two-Wire Extender/NTU to extend your
corporate LAN across a campus or across town to deliver
services to users at the higher speeds. The LAN port on the
LB510A autosenses 10BASE-T/100BASE-TX connections to match
your local network speed and autonegotiates for full or halfduplex connection. It also has an MDI-X button on its front
panel that enables you to switch between network-side
straight-through and crossover cabling.
For easy management, the 10BASE-T/100BASE-TX model
features an embedded Web server and can be configured
remotely from an IP network-based GUI simply by entering the
LB510A’s IP address into a standard browser. Because it has an
EOC management channel, the extender/NTU can be remotely
managed end to end.
The LB510A also features an IEEE 802.1d transparent
learning bridge up to 1024 addresses, uses the Spanning Tree
Protocol, and has built-in ping and traceroute facilities.
Comprehensive hardware diagnostics on the 10BASE-T/
100BASE-TX model enable you to easily maintain and install
the unit independent of your operating system.
Extend an E1/T1, X.21, or V.35 network.
Although similar in size and function to the LB510A, the
E1/T1, X.21, and V.35 models differ not only in their interface,
but their diagnostics and clocking modes, too.
With these G.SHDSL Two-Wire Extender/NTUs, you can
run local and remote loopbacks, including both local analog
loopbacks (LALs) and remote digital loopbacks (RDLs). The
V.35 model can also be used to enable DTE loops.
You can also run basic error rate (BER) tests with the E1/T1,
X.21, and V.35 extender/NTUs. They include an internal PRBS
pattern generator and detector that you can use to run tests
of this type without the need for any external equipment.
For controlling DSL and serial clock sources, the E1/T1,
X.21, and V.35 models support internal or receive recover
clock modes. The V.35 and X.21 models also support external
mode clocking, and the E1/T1 model also supports network
clocking.
With a G.703/G.704 interface on a pair of BNC connectors
as well as an RJ-48C jack, the E1/T1 G.SHDSL Two-Wire
Extender/NTU (ME231A) suits both balanced and unbalanced
E1/T1 connections. Use the dual BNC (TX and RX) to connect
a 75-ohm dual coax E1 or T1 network interface and the RJ-48C
to link to either a 120-ohm E1 or 100-ohm T1 twisted-pair
network interface.
The X.21 G.SHDSL Two-Wire Extender/NTU (ME232A) has a
DB15 connector, which by default is configured as data circuit
terminating equipment (DCE) for connection to data terminal
equipment (DTE), such as a router. But you can also use the
X.21 interface configured as DTE for connecting a DCE, such
as a modem or multiplexor. In either case, connect DTE or DCE
devices with an X.21 straight-through cable.
Supporting connections to V.35 serial equipment, the V.35
G.SHDSL Two-Wire Extender/NTU (ME233A) has a DCE
interface on a DB25 connector. Use this interface to connect
to DTE equipment, such as a router, through a V.35 straightthrough cable. To connect to another DCE device, such as a
multiplexor or a G.703 NTU, simply add a tail-circuit cable.
NOTE: Actual distance and link performance may vary
depending on the environment and the gauge and type
of wire you use.
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TECH SPECS
Clocking Modes — ME231A– ME233A: Internal, receive recovered;
ME233A also supports external clocking
Data Rates — From 64 kbps to 4608 kbps (4.6 Mbps) in 64-kbps steps
Diagnostics — LB510A: Ping and traceroute facilities, DSL run-time
statistics, DSL line error counters, local interface error counters,
bridged PPP statistics, Ethernet port statistics;
ME231A– ME233A: V.52 compliant (511/511E) pattern generator/
detector with error injection mode controlled by front-panel
switch; local and remote loopback control either by a front-panel
switch or from the DTE interface
Distance (Maximum) — See chart on page 2
Interconnection Cable Required — Twisted-pair, unconditioned, dry,
metal wire 19 AWG (0.9 mm) to 26 AWG (0.4 mm)
Line Coding — Trellis Coded Pulse Amplitude Modulation (TC-PAM)
CE Approval — Yes
Connectors — LB510A: Interface: (1) RJ-45 (10-Mbps/100-Mbps);
G.SHDSL: (1) RJ-11 (2-wire polarity insensitive on Pins 3 and 4);
Console: (1) RJ-45 (RS-232);
E1/T1, X.21, and V.35 models: Interface: ME231A: (2) BNC F, (1) RJ-48C;
ME232A: (1) DB15 F;
ME233A: (1) DB25 F with M/34 converter (included);
G.SHDSL: All: (1) RJ-45 (2-wire polarity insensitive on Pins 4 and 5);
Console: All: (1) RJ-11 (RS-232)
Indicators — LB510A: Power LED (solid yellow during normal operation);
WAN: Link LED (solid yellow when DSL link in established,
blinks when DSL link is in training);
Tx LED (solid yellow when DSL port is transmitting data);
Rx LED (solid yellow when data is received from the DSL port);
Ethernet: Link LED (solid yellow when valid signal is received on
the Ethernet port);
100 M LED (solid yellow when 100-Mbps link is negotiated);
Tx LED (solid yellow when LAN port is transmitting data);
Rx LED (solid yellow when data is received from LAN port);
E1/T1, X.21, and V.35 models: All: Power LED (solid green during
normal operation);
DSL LED (solid green when a DSL link is established, blinks
once every second while the DSL link is training);
TM/ER LED (solid red to indicate a test mode in progress, blinks
red if an error is detected either during a test mode or
during normal DSL operation)
ME232A–ME233A only: Terminal LED (ME232A: Solid green when
control signals have been asserted [while operating as a
DCE] and when indication signals have been asserted [while
operating as a DTE]; On ME233A, solid green when serial
interface asserts DTR;
ME231A only: LINK LED (solid green when valid framing is
detected, blinks once per second when signal without valid
framing is detected;
LOSS LED: Blinks once per second to indicate either framing
errors or clock slips
Operating Environment — Temperature: 32 to 122°F (0 to 50°C);
Humidity: 5 to 95%, noncondensing
Power — Input: 90–260 VAC, 50 –60 Hz, autosensing, external
Size — Each extender unit: 1.6"H x 5.5"W x 4.2"D (4 .1 x 14 x 10.7 cm)
1/29/2007
#26567
Recognize any of these situations?
• You wait more than 30 minutes to get through
to a vendor’s tech support.
• The so-called “tech” can’t help you or gives you
the wrong answer.
• You don’t have a purchase order number and the
tech refuses to help you.
• It’s 9 p. m. and you need help, but your vendor’s
tech support line is closed.
According to a survey by Data Communications
magazine, 90% of network managers surveyed say
that getting the technical support they need is extremely
important when choosing a vendor. But even though
network managers pay anywhere from 10 to 20% of
their overall purchase price for a basic service and
support contract, the technical support and service they
receive falls far short of their expectations— and
certainly isn’t worth what they paid.
At Black Box, we guarantee the best value and the
best support. You can even consult our Technical Support
Experts before you buy if you need help selecting just
the right component for your application.
Don’t waste time and money— call Black Box today.
Why Buy From Black Box?
Exceptional Value. Exceptional
Tech Support. Period.
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Item Code
G.SHDSL Two-Wire Extender/NTUs (NOTE: Must be used in pairs.)
10BASE-T/100BASE-TX LB510A
E1/T1 ME231A
X.21 ME232A
V.35 ME233A
LB510A: rear view
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