The three display states of the four LEDs on the
UTC9 permit more than 40 different connection
tests to be performed.
The following represent a few examples:
1a
(4)
Off
Grn
Red
Grn
Grn
Red
Grn
Grn
Grn
Red
Red
Red
Grn
Off
Grn
Grn
Off
Red
Grn
Grn
Red
Red
Grn
Red
1b
(5)
2a
(3)
2b
(6)
Meaning
Lead 1a interrupted
Lead 2a interrupted
Lead 1a and 2b reversed.
Lead 1b and 2b reversed.
Lead 1b interrupted.
Lead 2a connected
to terminal 5 instead
of terminal 3.
All leads incorrectly
connected or the
NTBA is in the
emergency mode.
Note:
The UTC9 is not designed for continuous
operation.
Use only for testing!
4.
Concluding the Test
Once test items 1 - 3 above have been
successfully completed, the terminal resistors
must be installed, then the connection is
checked one final time with the
UTC9
.
If the UTC9 display is positive, the ISDN
installation is operational.
UTC9 Display Evaluation
Display indicators during the connection socket
test
All LEDs are green.
All LEDs are red
No LEDs are on.
One or more LEDs fail
to go on.
One or more LEDs
are red.
Connection is OK.
All leads are
incorrectly connected or the
NTBA is in the emergency
mode.
The lead whose
associated LED fails
to go on is interrupted.
The lead whose LED
is red is incorrectly
connected.
Short circuit between
lead pairs or at least 2
leads of a lead pair
are interrupted.
CAUTION:
For technical reasons LED 3+6 also on the LAN
wiring tester go on in the normal mode and LED
4+5 in the emergency mode even if the wiring is
correct!
