4-Port BRI-Hub (UK):
ISU2011-4-UK
4-Port BRI-Hub (Euro):
ISU2011-4-EURO
8-Port BRI-Hub (UK):
ISU2011-8-UK
8-Port BRI-Hub (Euro):
ISU2011-8-EURO
BRI-Hub
TECHNICAL: (0118) 965 6000
SALES: (0118) 965 5100
FAX: (0118) 965 5001
ADDRESS: 464 Basingstoke Road, Reading, Berkshire RG2 0QN
WEB:
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BRI-Hub
Contents
Introduction............................................................................................................................... 4
Description of functions................................................................................................ 4
Options. ......................................................................................................................... 5
BRI-Hub............................................................................................................ 5
BRI-Hub S......................................................................................................... 5
Technical Specifications ........................................................................................................... 6
SO Interface BRI........................................................................................................... 6
Common Features ......................................................................................................... 6
Power supply................................................................................................................. 6
Power Supply ................................................................................................................ 7
Sound Emission............................................................................................................. 7
S -Interface............................................................................................................................... 6
0
Parts List.................................................................................................................................... 7
Installation................................................................................................................................. 8
Tabletop......................................................................................................................... 8
Wall mount.................................................................................................................... 8
Rack Mount................................................................................................................... 8
Power Supply ............................................................................................................................ 9
BRI-Hub........................................................................................................................ 9
BRI-Hub-S .................................................................................................................... 9
Connecting the Hub................................................................................................................. 10
Power Failure Operation ............................................................................................. 11
Termination Resistors ..................................................................................... 13
Operation................................................................................................................................. 14
Displays and Controls ................................................................................................. 14
Displays........................................................................................................... 14
Controls........................................................................................................... 14
Maintenance ............................................................................................................................ 14
Cleaning ...................................................................................................................... 14
Troubleshooting ...................................................................................................................... 15
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BRI-Hub
Introduction
Within the data communications and LAN industry it is well known that a structured cabling
concept using a star topology has significant advantages, such easier maintenance,
unproblematic changes in the configuration and faster fault finding. Last but not least, a
structured cabling concept may be used for all kinds of LAN-, WAN and telecommunications
technologies.
Nevertheless, with ISDN a bus has to be formed to connect several users to one Basic Rate
Interface (BRI), but a bus cannot be formed with a star topology. Alternatively a complete
BRI must be dedicated to one user (point to point configuration), which is in many cases not
feasible or too expensive.
By using the active star BRI-Hub it is now possible to use the structured star-cabling concept
for ISDN. In addition the distance between the NT and the TEs may be extended because of
the use of point-to-point links between the BRI-Hub and the TEs. It is also possible to use the
"extended passive bus configuration" (distance up to 1000m) if all connections to the TEs are
in the same range of distance (+/- 50m).
The Phantom Feed unit can be used with the BRI-Hub to provide power to all 4 or 8 ports on
the BRI-Hub.
Description of functions
The BRI-Hub converts the ISDN BRI bus structure to a set of point-to-point connections,
which are connected within the BRI-Hub to form a 'logical bus'. At this, the BRI-Hub makes
it possible to hook up ISDN terminals via a maximum of 8 lines with the maximum length of
150 m each. Up to 1000 m is possible in a special configuration. Every port forms a separate
electrical segment. Through this wiring faults don't affect other segments.
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BRI-Hub
If a BRI needs to be made available in several rooms, it used to be necessary to install a bus
from the server room through all rooms. (See picture ‘old’). Now star wiring can be used with
BRI-Hub, which comes to use also for telephone and local area networks (see picture 'with
BRI-Hub').
Options
BRI-Hub
This option derives its power from the power supply provided.
BRI-Hub S
This option derives power from the S-Bus and uses an internal DC-DC converter to adapt the
voltage to power itself – no external power supply is required. This option is available as a
special request from Black Box.
Both of the above options can be used in conjunction with the Phantom Feed, a device used
to provide power on each of the hub’s S interfaces.
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BRI-Hub
Technical Specifications
SO Interface BRI
Number of interfaces……………………………………5 for BRI-Hub-4, 9 for BRI-Hub -8
Type and coding…………………………………………I.430, Mod. AMI, 4-wire
Frame structure………………………………………….I.430 (48 Bits per 250 µs)
Transmission rate………………………………………..192 kbps +/- 50 ppm
Interface connector………………………………………RJ-45
Common Features
Size (W x H x D)………………………………………..205 x 40 x 110 mm
Weight…………………………………………………..450g
Housing material………………………………………..ABS
Protection class………………………………………….IP 21
Environmental temperature……………………………..0° to 40° C
Storage temperature……………………………………..-20° to 70° C
Humidity……………………………………………….. max. 90% (non condens.)
Supply voltage…………………………………………..6 - 9V
Power consumption……………………………………. max. 2W
Power supply
Primary voltage…………………………………………220V~ +/-10%, 50 Hz
Output voltage…………………………………………..6V=
Output current…………………………………………..max. 500mA
S -Interface
0
Connector: RJ-45 (ISO 8877, EN 28877)
Pin
1
Signal
Direction Power Feeding
PS3 +
2
PS3 -
3
4
5
6
TE(+)
NT(+)
NT(-)
TE(-)
TE ꢀ NT PS1 + (Phantom)
NT ꢀ TE PS1 - (Phantom)
NT ꢀ TE PS1 - (Phantom)
TE ꢀ NT PS1 + (Phantom)
PS2 -
7
8
PS2 +
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BRI-Hub
Environmental and Safety Notes
The device conforms to all european and international standards for safety, environment,
EMC and the ISDN basic rate interface.
Power Supply
•
•
•
The power adaptor is according to safety class II (VDE 0551) and my only be used
indoor.
Do not use the power adaptor when it was brought from a cold to a warm
environment. In that case condensing water may damage the unit.
There are no user serviceable part inside the power adaptor. Therefore it is not
necessary to open the unit
Sound Emission
The unit does not emit any sound.
Parts List
When opening your BRI-Hub the following parts should be present:
•
•
BRI-Hub unit
ISDN cable with two RJ45 plugs (Western plugs) to connect the BRI-Hub to the
network termination (NT) or the PABX basic rate interface. The cable has a length of
2m.
•
•
•
Power Supply adaptor (not with BRI-Hub-S)
Users Manual
Two 6mm dowels and two 6mm screws for wall mounting
The power feeding unit, The Phantom Feed, may be used to feed all TE ports with power
(40V, 8W). This device is available as an option.
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BRI-Hub
Installation
For proper operation the device must be placed in a suitable location. It should be a clean and
dry environment without direct sun light. Sufficient cooling must be possible. Do not pack or
cover the unit or set other warm equipment on top of it.
Tabletop
Just place the unit on a clean and dry place. Multiple BRI-Hub units may be stacked. The
rubber stands give enough space for proper cooling.
Wall mount
The wall assembly works as follows:
•
Drill two holes vertically, one above the other with a separation of 95 mm, into the wall
where you want to place the BRI-Hub.
•
•
Completely put the dowels into the drilled holes.
Turn the BRI-Hub screws into the dowels; with a separation of approx. 7 mm still left
between wall and screw head.
•
•
Now place the BRI-Hub so that the screws fit into the holes in the floor plate. The power
LED is in the upper right corner.
Carefully shift the BRI-Hub downward, so that the screws move into the slots inside the
floor plate.
Caution! Don't use any excessive force. If the screws are turned too far into the dowels, the
screws may not move into the slots. Turn the screws out a little and try again.
Rack Mount
For the assembly into a rack an optional 19” front panel is needed. This may hold one or two
BRI-Hub devices. This 19”rackmount panel is available as a special from Black Box. Please
call technical support for further information. The front panel is fixed to the BRI-Hub devices
by two engine screws.
•
•
To do this the panel is set onto the front of the BRI-Hub.
The two screws are put into the holes of the panel provided for this. (Left from the NT
port and right besides the power LED.
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BRI-Hub
•
•
The screws must be put into the holes of the BRI-Hub. The screws slide approximately 25
mm into the case.
The screws can be screwed in tight.
Power Supply
BRI-Hub
The standard BRI-Hub is supplied with a wall mount power adapter. There is no power
switch at the device. The BRI-Hub is active when the power adaptor is plugged into an outlet
and the DC connector of the power adaptor is connected to the BRI-Hub.
BRI-Hub-S
Besides the operation with a power adaptor it is possible for a BRI-Hub-8S or BRI-Hub-4S to
get its power through the power feeding of the NT or PABX via the NT port. Please note that
the BRI-Hub needs approximately twice the power as an ISDN telephone. Therefore it is not
possible to operate the BRI-Hub from the ‘restricted mode’ power feeding.
If the DC connector of the power adaptor is plugged into the BRI-Hub DC socket, the BRI-
Hub will switch to the power adaptor automatically even if the power supply doesn't deliver
any electrical power. Therefore it is necessary to unplug the DC connector from the BRI-Hub
when the power feeding of the BRI is used.
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BRI-Hub
Connecting the Hub
6V DC
CE
The DC connector of the power adapter is inserted into the jack on the left side of the rear
panel (Jack "6V DC").
Do not use other power adaptors than the original one. In any case notice the polarity of the
connector. Inner tip +, outer ring -.
To connect the BRI-Hub to the NT or an internal BRI of a PABX, use one of the connectors
labelled 'NT'. Use the enclosed ISDN-cable. Both connectors are parallel connected, so it
doesn't matter which one you chose. The second connector may be used to connect a test
device or other TEs. (see ‘Power Failure Operation’ on next the page).
Termination of the NT-port may be switched on and off using the Term-switch. When
installing the BRI-Hub, check that both ends of the bus are terminated properly, but only the
ends!
Depending on the quality of your cables, a maximum length of 150m may be connected to
every TE-port of the BRI-Hub. Note that the sum of the cable lengths (NT-BRI-Hub plus
BRI-Hub-TE) should not exceed 150m. Since the BRI-Hub will normally be placed directly
next to the NT or the PABX, the entire 150m are available for the TE connection.
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BRI-Hub
The TE-ports termination resistors are permanently active and cannot be switched off.
Please install terminating resistors to the end of the connecting cables.
In the above example the Term-switch must be in the off position, i.e. termination resistors
are off. This is because the BRI-Hub is not connected to the end of the bus.
Power Failure Operation
If the BRI-Hub loses power, the terminal devices directly connected to the NT ports will still
operate. For this to happen case one must observe the maximum cable length and the position
of the terminating resistors. In more detail this is:
•
The length of the cable connecting the NT to the BRI-Hub plus the length of the cable
connecting the BRI-Hub to the TE on the second NT port must not be longer than 150m.
Both cables form a passive bus.
•
•
In case of a bus installation at the NT port, BRI-Hub must be the last device on the bus.
The termination resistors must be switched off. Termination resistors must be installed at
the end of the TE’s bus
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BRI-Hub
Configuration for power fail communication with the BRI-Hub
If cable connections between the BRI-Hub and the terminal equipment (TE) are longer than
the proposed 150m, operation may be possible under specific conditions:
1. The NT must be switched to "extended passive bus". "Point-to-point" or "adaptive
timing”.
2. All cable connections at the TE ports must have the same range of length, i.e. +/- 50 to
100m, depending on the cable quality.
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BRI-Hub
Termination Resistors
The signal pairs must be terminated with 100Ω resistors at both ends of the bus.
These must be installed as shown below. If not placed correctly, they may short the power
feeding voltage.
Pin Pin description Direction
1
2
3
4
5
6
7
8
2a
1a
1b
2b
TE ꢀ NT
NT ꢀ TE
NT ꢀ TE
TE ꢀ NT
100Ω each
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BRI-Hub
Operation
No service is needed during operation.
Cable shorts at one TE port only affect the power feeding voltage of all ports if they are
internally connected. To reduce this effect self-healing fuses are connected to each port.
The current version of the BRI-Hub cannot clear problems with cable reversals of the TE pair
(Pins 3 and 6 of the RJ-45). If one of the connected TEs has such a pair reversal, no operation
is possible since the pulses sent by different TEs have different polarity.
Displays and Controls
Displays
Pwr
is on (green), when the BRI-Hub is operating. I.e. the power supply is active.
This may be the power adaptor or the power feeding when using the 'S' option
(BRI-Hub-S)
Controls
Term
On: (down position). Both pairs of the NT port are terminated (100Ω).
Off: (up position). Termination resistors off.
Maintenance
Cleaning
To clean the BRI-Hub use a damp piece of cloth or antistatic cloth. Please do not use scoring
or alcoholic fluids.
Caution! Never clean the BRI-Hub wet. This may cause short circuits inside the device.
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BRI-Hub
Troubleshooting
Fault
Problem
How to clear the problem
Pwr-LED is off BRI-Hub is powered off Plug in power adaptor
No mains power
Check for main power
Faulty power adaptor
Use other compatible power adaptor. Check
polarity!
For BRI-HUB-S only:
loss of power inside NT
or PABX
Use original power adapter
BRI-Hub is faulty
Please return the device to your dealer.
Use another port for test.
Specific devices Cable shorts
on a port do not
operate via the
BRI
Check for cabling faults.
Faulty terminal
equipment
Check with other equipment
Cable too long
A BRI-HUB is used
which is in the power
down mode
Connect TE directly to the BRI-Hub for test
Power on the BRI-HUB
Only devices at
port 1 may
communicate
If you are still having problems with you BRI-Hub, please call Black Box technical Support.
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BRI-Hub
Notes
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