BTR
TELECOM
Error Detection
SiTi
When testing the wall outlets the LEDs on the
SiTi
will light as follows:
all LEDs
light green
all LEDs
light red
all LEDs
are off
all wires are connected
correctly
all wires have been
misconnected
short circuit on the wire pairs
or interruption on at least two
wires of a pair
Test Device for
ISDN Installations
SiTi
Quick and easy testing
with four LEDs
P/N
130 659-E
one or several
interruption of such wire of
which the related LED is off
LEDs are off
one or several
misconnection of such
LEDs light red
wire of which the related
LED lights red
User Manual
SiTi
The
SiTi
is a simple device for testing the
installation of an ISDN-S
0
-connection.
Checking of the installation is done by
plugging the
SiTi
into the RJ45 jack. The
terminating resistors should not yet be
mounted.
The four LEDs of the
SiTi
show the wiring
diagram of the four terminating wires for
the ISDN-installation.
terminal
number
By combining those four LEDs with their
different conditions green, red and off, the
SiTi
can show more than 40 different wiring
conditions. The following chart shows
some examples.
LED auf dem
SiTi
1a
(4)
off
red
1b
(5)
2a
(3)
2b
(6)
Error
green green green
wire 1a is interrupted
green
wire 2a is interrupted
green green red
green red
off
green green off
green red
4
5
3
6
SiTi
wire 1a has been
reversed with wire 2b
wire1b has been
reversed with wire 2b
wire 2a connected to
terminal 5 instead of
terminal 3
all wires are
misconnected or
the NTBA is running
in emergency mode
1a
1b
2a
2b
green red
green
wire 1b interrupted,
wire
number
red
red
red
red
1. Check of the NTBA Connection
First the ISDN connection at the NTBA is
checked at normal and at emergency
operation.
Normal mode
means that the NTBA is
connected to the 230 V mains.
Emergency mode
means that the NTBA is
not
connected to the 230 V mains and the
installation is supplied by the Telecom
power supply.
When the
SiTi
is plugged into the jacks of
the NTBA, the four LEDs light green when
the NTBA is working in normal operation, if
it is running in the emergency mode all
LEDs light red, provided that the NTBA and
the attachment are working correctly.
2. Check of the Wall Outlet Installation
The NTBA has to run in normal operation
and the terminating resistors should not be
mounted when the wall outlet installation
is tested. The
SiTi
is plugged in one jack
after another (see error chart on the back).
3. Enhanced Check for S
0
-Bus Installation
If more than one ISDN device is to run at
one ISDN installation it is important that
wires 2a and 2b are not reversed when
terminated.
In order to exclude reversal of these two
wires, wire 2a is interrupted at the first
possibility of the ISDN installation. Now
the
SiTi
should show at each wall outlet
the interruption of wire 2a.
If it is showing interruption of wire 2b
this proves that wire 2a and 2b have been
reversed.
When all reversals have been detected and
corrected, wire 2a can be reterminated.
4. Test Completion
After completing all tests the terminating
resistors are mounted and the ISDN
installation can be put into operation.
Note:
The
SiTi
is not meant for steady
operation. Use it only for testing.
Designed and manufactured by:
1298/100/01/MAMS/899805-01
Blumberger
Telefon- und Relaisbau
Albert Metz e. K.
Im Tal 2
D-78176 Blumberg
phone +49 7702/533-0
fax
+49 7702/533-433
btr.telecom@ria-btr.de
www.ria-btr.de
Subject to technical change.
BTR
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