Manual of VDSL2 Mini MEG101AE-R4 Page #1
http://www.black-box.eu
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Manual
MEG101AE-R4
VDSL2 Mini Modem
Manual of VDSL2 Mini MEG101AE-R4 Page #2
http://www.black-box.eu
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Dear customer,
thanks for purchasing MEG101AE-R4, the new release of our successful MEG101 series.
Please be noted that the Release 4 is different from previous releases. Therefore this one
is not compatible with older releases and not to be used with the older aggregation
switches MEG801 series.
Our years of experience in xDSL technology made this product better and more intuitive
then other previous xDSL devices from Black Box. The DIP switches are described in a
way that makes it easier for you. The maximum bandwidth is now 100Mbps while the
latency is lower.
Anyway, as time changes, things are changed. The Release 4 does no longer have the
telephony port for transmitting analogue telephony in parallel. Therefore you now get 2
LAN Ports.
If you wish to transmit analogue telephony (or S2M/E1 or ISDN) please contact Black Box.
There are ways and devices available to transmit any telephony connection on a working
low latency Ethernet Network connection.
For any questions, please feel free to contact your nearest Black Box office. Visit
www.black-box.eu for a list of countries and offices and phone numbers and addresses.
Manual of VDSL2 Mini MEG101AE-R4 Page #3
http://www.black-box.eu
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Warranty
MEG101AE-R4 is sold with a standard warranty of 12 months. Your local dealer or near
Black Box office may have agreed with you to a longer warranty period.
Warranty does not include:
o Using any other power or power supplies then the original included power supplies
o Opening the device
o Changing the device
o Placing screws or nails with or in or through the device
o Damages by surge or overpower
o Damages by heat, water or direct sunshine
If you experience any error or problem, please be sure, Black Box will care for you and the
problem. Please contact your local dealer or nearest Black Box office for support. If you
are told to send the device for RMA and repair, ALWAYS ship the whole device with power
supplies.
Spare power supply for MEG101AE-R4 is Black Box Partnumber KVT127E-PS-R2
Safety warnings
o DO NOT open the device. Opening or removing covers can expose you to
dangerous high voltage points or other risks. ONLY qualified service personnel can
service the device.
o Place connecting cables carefully so that no one will step on them or stumble over
them. DO NOT allow anything to rest on the power cord and do NOT locate the
product where anyone can work on the power cord.
o DO NOT install nor use your device during a thunderstorm.
There may be a remote risk of electric shock from lightning.
o DO NOT expose your device to dampness, dust or corrosive liquids.
o DO NOT use this product near water, for example, in a wet basement or near a
swimming pool.
o DO NOT obstruct the device ventilation slots or staple the units,
as insufficient air flow may harm your device.
o DO NOT place items on the device.
o DO NOT use the device for outdoor applications, and make sure all the
connections are indoors or have waterproof protection place.
o Keep the device and all its parts and accessories out of children’s reach.
o Clean the device using a soft and dry cloth rather than liquid or atomizers.
Power off the equipment before cleaning it.
Manual of VDSL2 Mini MEG101AE-R4 Page #4
http://www.black-box.eu
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MEG101AE-R4 Setup Steps
MEG101AE-R4 is a Point to Point Ethernet bridge using simple telephony wires as a
media. MEG101AE-R4 offers you two LAN 10/100 Mbps Ports. Therefore MEG101AE-R4
is a fully switched L2 device.
To get started, unpack the device. Only use the included power supply. Do not mix this
power supply up with power supplies from older MEG101 releases. Followed by
unpacking these are your steps to get the line up and running:
a.) Configure one device to be installed on side A to be the Transmitter (TM)
Set DIP Switch #1 (Mode) to ON.
b.) Configure one device to be installed on side B to be the Receiver (RCV)
Set DIP Switch #1 (Mode) to OFF.
c.) Leave the other DIP Switches #2 to #4 in factory default (OFF-OFF-OFF)
c.) Connect your 2 wire route to the LINE Port by either using the RJ11 (middle pins) or
the terminal block.
d.) Connect the power supplies and wait for the LINE LED to light up.
Maybe you experience one or the other of the following:
1.) If you experience that the line is unstable (LINE LED is on for some minutes, then
again off for some seconds, then again on etc…), change DIP Switch #3 (SNRM)
to ON. Therefore you need to repower both units.
2.) If you experience Network dropouts, change DIP Switch #4 (Interleave) to ON.
Therefore you need to repower both units.
3.) If you experience interferences or bad audio quality on nearby telephony
transmissions, change DIP Switch #2 (Band) to ON. Therefore you need to
repower both units.
The maximum bandwidth of MEG101AE-R4 is 100Mbps symmetrical up to a cable length
of 300-400m. How many meters exactly mainly depends on your wire diameter, quality,
number of interconnects and more.
The maximum cable length of MEG101AE-R4 is up to 3000m (good and thick cables). But
for longer cables (>300-400m) the bandwidth is lower and asymmetrical. See page 13 for
a performance/reach table.
Avoid using telephony RJ11 ribbon cables. These cables are built with using very
low diameter stranded cables. Using them will mean that bandwidth is lower and
reach is shorter!
Manual of VDSL2 Mini MEG101AE-R4 Page #5
http://www.black-box.eu
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What does Interleave mean?
This feature is used to protect the transmission and the stability of the connection against
crosstalk issues. Crosstalk is coming from signals on other cables. With the Interleave
feature your connection and transmission is getting more reliable.
Without Interleave through noise caused by crosstalk you may loose a certain amount of
data. This leads to a re-request of data, which slows down your overall bit rate and net
bandwidth. With a lot of lost data packets you may also loose synchronization between
transmitter and receiver.
Interleaving is a method of taking data packets, chopping them up into smaller bits and
then rearranging them so that once contiguous data is row spaced further apart into a non
contiguous stream. Data packets are re-assembled into the right order of data by the
receiver.
If your line is particularly susceptible to bursts of noise then interleaving should improve
your VDSL experience. Noise on the line caused by crosstalk will not damage a complete
block of data, but parts of data blocks, which can be re-assembled by CRC.
Note: Higher interleave means higher latency.
Manual of VDSL2 Mini MEG101AE-R4 Page #6
http://www.black-box.eu
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What does SNRM mean?
This means the Signal to Noise ratio. Any xDSL device puts a signal on a cable which
degrades with every meter and kilometre of cable. The degradation comes from noise
produced by other signals on nearby cables, by high power devices (elevators), by
smartphones (EMI) and other wireless devices.
At the end the signal of the xDSL device has a certain strength in comparison to the noise.
You can compare this with two people talking being in an empty room talking (no noise) or
two people talking in a disco (high noise).
Many xDSL devices adopt themselves in term of bandwidth and modulation. The better
the signal in comparison to the noise comes through, the higher the bandwidth can be.
Setting the MEG101AE-R4 to a higher SNRM of 9db means that the modem will
synchronize the line with a spare of 9db budget. If you experience high EMI at your
installation a higher spare budget means more stability but less bandwidth.
What does DIP Switch #2 do?
The factory default setting is to have DIP Switch #2 to OFF position. This is good for
long/bad cables (and for short/good cables too). A different frequency spectrum is used
whether you have DIP Switch #2 to ON or OFF position.
DIP Switch #2 ON for short/good cables 500kHz to 30MHz
DIP Switch #2 OFF for long/bad cables 25kHz to 30MHz
In mode “for long/bad cables” the modem completely autodetects cable length. The
complete frequency spectrum can be used. In mode “for short/good cables” just a part of
the frequency spectrum is used. That mode also allows maximum bandwidth, but the
frequencies from ISDN/telephony nearby cables are not touched and used. That reduces
EMI interferences.
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