Black Box Abeo G.703 LAN Installation and operating instructions

Manual and
Installation guide
AAbbeeoo GG..770033 LLAANN
EExxtteennddeerrss
MXU9020

Abeo LAN over X.21/V.35 Extenders
Chapter 1 Introduction
1.1 About the unit 2
1.2 Performance 3
1.3 Safety 3
1.4 Electromagnetic Compatibility 3
1.5 EN55022 Declaration 3
1.6 FCC Declaration 3
Chapter 2 Description of parts
2.1 Rear Panels 4
2.2 Status Display - Rear Panel 4
2.3 Status Display - LAN ports 4
2.4 Power Supply 5
2.5 Unbalanced BNC E1 Line Port 5
2.6 Balanced RJ-45 E1 Line Port 6
2.6.1 Connecting to a terminal device 6
2.6.2 Connecting to a network device 7
2.6.3 RJ-45 Connector layout 7
2.6.4 Cable lengths and types 8
2.7 LAN Ports 9
Chapter 3 Installation and Set-up
3.1 Setting-up the bit switches 10
3.1.1 Bit switch definitions 10
3.1.2 Timing 11
3.1.3 E1 Port select RJ-45/BNC 11
3.1.4 Loopback test 11
3.1.5 LAN mode 11
3.1.6 Auto MD /MD -X 11
3.1.7 E1 Line Port 11
Chapter 5 Specifications
5.1 Unit Specifications 15

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The Black Box MXU9020 is a four port auto-sensing 10/100BASE-T Ethernet Switch with an E1
Uplink. The product can be used to extend four LAN ports across a WAN link to a remote site.
Each LAN port may be connected to a single LAN workstation or to a hub or switch
supporting multiple workstations. The exact configuration will depend upon the user’s
network design and workload characteristics.
The MXU9020 Ethernet switch can switch between local LANs connected to its four ports,
and the unit may thus reduce the need for local LAN hubs and switches. The Ethernet switch
has full wirespeed filtering so that the WAN port carries only traffic destined for the remote
WAN-linked site, and an efficient HDLC encapsulation of packets ensures maimum
throughput over the WAN link. There is internal packet buffering to smooth out bursty
traffic. MXU9020’s are used in pairs, one on either side of a WAN link.
1.1 A out the MXU9020
MXU9020
MXU9020

Switching and filtering is performed at wirespeed: 148810 packets/second
The MXU9020 can handle a traffic level of 4064 packets/second over the E1 link.
The MXU9020 should not be connected to cabling which would be required by BS6701 to be
equipped with over-voltage protection. The following ports are designated SELV (Safety
Extra Low Voltage) within the scope of EN41003:
E1 Line (or WAN) port (BNC or RJ45)
4 x 10/100BASE-T Ethernet ports
These ports should only be connected to SELV ports on other equipment in accordance with
EN60950 clause 2.3.
n order to ensure EMC compliance all signal and data cables and connectors must use a
screened connector shell with a screened cable. The cable screen must be terminated to the
screened connector shell and not connected to any pins of the connector. Failure to use the
correct connector may compromise EMC compliance.
The MXU9020 is a Class A product. n a domestic environment it may cause radio
interference in which case the user may be required to take adequate measures.
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commerical
environment. This equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the isntruction manual, may cause harmful
interference to radiocommunications. Operation of this equipment in a residential area is
likely to cause harmful interference in which case the user will be required to correct the
interference at their own expense.
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1.2 Performance
1.3 Safety
1.4 Electromagnetic Compati ility
1.5 EN55022 Declaration
1.6 FCC Declaration

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All connections into and out of the MXU9020 are made through the rear panel which is
shown in schematic form below for both AC and DC powered models.
There is a status LED on the right hand side of the rear panel which indicates the status of
the unit as shown in the figure below.
Each LAN port RJ-45 connector on the rear panel has two miniature LEDs mounted on it. The
left hand (green) LED shows link activity, and the right hand (yellow) LED shows operation at
100Mbps when it is illuminated.
2.1 Rear Panel
2.2 Status Display - rear panel
Black Box MXU9020-DC
Black Box MXU9020
Status LED Meaning
Off No mains power present
On Green Status OK
On Red E1 WAN port LOS Alarm
2.3 Status Display - LAN Ports

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2.4 Power Supply
The MXU9020 is powered by a mains supply with an input voltage of 100-250VAC, 50-60Hz
with an input current of 60 to 24mA, and an input consumption of 6 watts approximately.
The MXU9020 is provided ex-factory with a 250mA internal fuse. Mains power is connected
via the EC inlet on the rear of the unit.
An alternative -48VDC powered unit is available. The input voltage and current ranges are
-36 to -72 volts DC, 200-100mA. A Buccaneer type socket is fitted to the rear panel, and a
plug is provided with the unit for the customer’s own wiring. The connections are labelled on
the rear panel of the MXU9020.
Note: The MXU9020 must be connected to mains safety earth for correct operation.
Excessive voltages are present inside the unit. There are no user serviceable parts inside the
unit, and the cover should not be removed by unqualified personnel. The unit must not be
exposed to damp or condensing conditions.
The network is connected to the BNC connectors at the rear of the unit as shown below:
Cable lengths should be restricted to those defined below. The total maximum attenuation
of each of the cables attached to the network port must not exceed 6dB whne measured at
1.024 MHz. The frequency/attenutation characteristic of the cables attached to the network
port shall follow a root frequency law.
Pin No, Connection
1 -48VDC
2 Ground
3 0VDC
2.5 Un alanced BNC E1 Line Port
Pin Function
Tip Signal
Ring Shield
Cable Max Length (metres)
UR202 720
RG59U 600
BT2002 650
BT2003 680

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2.6 Balanced RJ-45 E1 Line Port
The layout of the female RJ-45 line or network port mounted on the rear panel is shown
below.
A connecting cable from the network port to a terminal port such as a router or a PABX is
straight through. Connections are defined in the table below.
Pin Function
1 Tx tip
2 Tx ring
3 Tx shield
4 Rx tip
5 Rx ring
6 Rx shield
7 Not connected
8 Not connected
2.6.1 Connecting to a terminal device
DSU port pin DSU port
function
erminal
port pin
erminal
port function
1 Tx tip 1 Rx tip
2 Tx ring 2 Rx ring
3 Tx shield 3 Rx shield
4 Rx tip 4 Tx tip
5 Rx ring 5 Tx ring
6 Rx shield 6 Tx shield
7 Not connected Not connected Not connected
8 Not connected Not connected Not connected

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2.6.2 Connecting to a network device.
A connection from the network port to a network device such as an E1 line or an NTU
requires a crossover cable. Connections are defined in the table below.
The figure below shows both the plug and socket head on so that any connecting wires are
behind the connector. The connector numbering is shown.
DSU port pin DSU port
function
Network
port pin
Network
port function
1 Tx tip 4 Rx tip
2 Tx ring 5 Rx ring
3 Tx shield 6 Rx shield
4 Rx tip 1 Tx tip
5 Rx ring 2 Tx ring
6 Rx shield 3 Tx shield
7 Not connected Not connected Not connected
8 Not connected Not connected Not connected
2.6.3 RJ-45 Connector layout.

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2.6.4 Ca le lengths and types
Cable lengths should be restricted to those defined below:
Note: The totoal maximum attenuation of the cable attached to the network port must not
exceed 6dB when measured at 1.024 MHz. The frequency/attenuation characteristic of the
cables attached to the network port shall follow a root frequency law. This port type is
approved to CTR12, CTR13.
Pin Max Length (Metres)
Belden 8132 (28 AWG) 175
Belden 9841 (24 AWG) 300

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2.7 LAN Ports
The four LAN ports are supported by an array of four RJ-45 female connectors mounted on
the rear panel of the MXU9020.
These ports automatically sense the LAN interface and switch between MD and MD -X
configurations. This removes the potential requirement for Crossover cables when
connecting LANs to the MTU9020 whatever LAN equipment is being used. The ports also
automatically sense the LAN speed and operate at either 10 Mbps or 100 Mbps, and sense
whether operation should be in full or half duplex mode.
There is a miniature LED on the lower right corner of each RJ-45 socket on the rear panel
which is illuminated yellow when operation is at 100 Mbps. The miniature LED on the lower
left corner of each RJ-45 socket is illuminated green when the link is active.
The RJ-45 connector layout for an auto-sensing MD /MD -X port is shown below.
Pin No. MDI Signal MDI-X Signal
1 Tx Data +ve Rx Data +ve
2 Tx Data -ve Rx Data -ve
3 Rx Data +ve Tx Data +ve
4 Not Connected Not Connected
5 Not Connected Not Connected
6 Rx Data -ve Tx Data -ve
7* Not Connected Not Connected
8 Not Connected Not Connected
The pin numbering for the connector is shown below: