SECTION MITL91 OS/91 1
O-096-350-NA
a
A
-
Available
-
not in use
(-
-,
a
C
-
Conversation
-
in use
l
E
-
Error
-
found faulty by diagnostics
l
F
-
Found
-
in use by test line
a
0
-
Optional
-
no specific circuit selected.
3.18 Once the test line has obtained a speech path and a receiver, it
does not change its selection until it originates a new call
(changing the switch settings meanwhile will cause the display to
change to reflect the status of the receiver, and speech path whose
numbers are on the switches). If a valid speech path is selected, but an
invalid receiver is selected (e.g.,
91),
then the line is connected to the
speech path, no receiver is selected, and no dial tone is introduced.
This provides the ability to listen to a speech path for the presence of
noise. The test line, since it has
.not
been assigned a receiver, will not
time-out and revert to reorder tone. It is then possible to listen to any
unused speech path by remaining off-hook and selecting the speech
path number with the bottom two switches.
Slot Initialization Activate
3.19
Occasionally, when circuit cards are plugged into the system,
the logic circuits on the card may not reset completely. In order
to guarantee complete reset of all card logic, a slot initialization pro-
:
cedure has been provided. This procedure allows the service per-
sonnel, after inserting a card into a shelf, to initialize the card slot from
the test line. To initialize the card slot, dial 555
+
5 + nn, where nn is
the card slot number (1-17 shelf 1, 31-42 shelf 2). Since inserting a
card may cause diagnostic errors, this procedure is normally followed
by dialing 555 + 1 to clear all system errors.
093
101
109 117
094 102 110 118
m--v
log5
103 111 119
I
I
I
096 104 112 120
B-w-
12 13 14
15 Card Position
Note: The ---- indicates the applicable
equipment number.
i
Figure 3-4 Receiver Equipment Numbers
Page 26
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