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Connecting ISDN End Devices Directly to the Internal U
Important: Connecting end devices directly is only
possible on 19" casing variants.
Requirements
– Minimal distance between the devices Maximum
length of the connecting cables to be used: 10 m.
Note: If the end device is placed a considerable
distance away from the PBX, the cable and the wall
sockets must be permanently installed. See
– One U
/S
adapter
P0
0
Note: To connect a single COMfortel 1100/1500/
2500/2500 AB system telephone, no U
is required. If two COMfortel 1100/1500/2500/2500
AB system telephones should be connected to the
U
port, another U
P0
P0
Installing Cable and the Wall Socket on the Internal U
Warning: Power surges, which can occur during
electrical storms, can cause life-threatening electric
shocks or damage/destroy the PBX.
Let a skilled electrician lay all the cables inside the
building.
Note: For a structured cable installation configured
on one of the 19" casing variants, CAT5 cables and
CAT5 wall sockets are used instead of the cables and
wall sockets listed here.
Important: For structured cable installation on a 19"
casing variant, the line length all of the applicable end
devices must be taken into account.
Requirements
– Installation cable (for example, J Y (St) Y 2x2x0.6)
with the following characteristics:
One twisted pair per U
unscreened; however: screened for unfavourable
conditions, for example, near a strong transmitter
or an electrical power line
– An ISDN connection socket (for example, IAE or
UAE8)
Caution: Terminators integrated into the wall sockets
are destroyed and can therefore cause damage to the
device.
Do not install terminators on one end of a line
connected to the U
port. Terminators are already integrated into the
Page
/S
adapter
P0
0
/S
adapter is required.
0
port
P0
port, as opposed to the S
P0
Connecting ISDN End Devices
Steps to Take
1.
Single COMfortel 1100/1500/2500/2500 AB: Connect
the COMfortel 1100/1500/2500/2500 AB to the RJ-45
socket on the internal U
Another end device or two COMfortel 1100/1500/
2500/2500 AB units: Insert the U
the RJ-45 socket on the internal U
2.
Another end device or two COMfortel 1100/1500/
2500/2500 AB units: Connect the end devices to the
49.
U
/S
P0
Further Steps
To finish commissioning, you need to set up a phone
number for the end device in the COMset
configuration manager.
To finish commissioning, you need to set up an
internal phone number for each end device in the
COMset configuration manager.
end devices (COMfortel 1100/1500/2500/2500
AB or U
Remove the terminators already integrated in the
wall sockets in order to use the sockets on the U
port.
– Distance/line length between the devices depends on
the cable used:
Maximum 600 m for a screened cable with a pair
diameter of 0.6 mm
Maximum 1000 m for an unscreened cable with a
pair diameter of 0.6 mm
– One U
connected
Note: To connect a single COMfortel 1100/1500/
2500/2500 AB system telephone, no U
is required. If two COMfortel 1100/1500/2500/2500
AB system telephones should be connected to the
U
port, another U
P0
Note: When using a U
to use an ISDN wall socket. The U
be mounted permanently on the wall and firmly
connected with both screw terminals on the back of
the PBX. See
Steps to Take
1.
Lay the line.
0
Note: Prevent interference. Avoid laying long lengths
of parallel lines, especially next to mains. Twist the
pairs.
P0
port.
P0
adapter.
0
P0
/S
adapters).
P0
0
/S
adapter, depending on the device to be
P0
0
/S
adapter is required.
P0
0
/S
adapter, you do not need
P0
0
Fig. 49 on page
50.
Port
/S
adapter into
P0
0
port.
P0
Port
P0
/S
adapter
P0
0
/S
adapter can
P0
0
49
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