Black Box Switch ISU2011 4 EURO User Manual

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:  
 
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  
TECHNICAL: 0118 931 2233  
3
 
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.  
SALES: 0118 965 5100  
4
 
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.  
TECHNICAL: 0118 931 2233  
5
 
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 +  
SALES: 0118 965 5100  
6
 
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.  
TECHNICAL: 0118 931 2233  
7
 
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.  
SALES: 0118 965 5100  
8
 
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.  
TECHNICAL: 0118 931 2233  
9
 
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.  
SALES: 0118 965 5100  
10  
 
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  
TECHNICAL: 0118 931 2233  
11  
 
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.  
SALES: 0118 965 5100  
12  
 
BRI-Hub  
Termination Resistors  
The signal pairs must be terminated with 100resistors 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  
100each  
TECHNICAL: 0118 931 2233  
13  
 
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 (100).  
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.  
SALES: 0118 965 5100  
14  
 
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.  
TECHNICAL: 0118 931 2233  
15  
 
BRI-Hub  
Notes  
SALES: 0118 965 5100  
16  
 

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