Procedure 11.23: VERIFY OPERATION OF ALD2 CIRCUIT PACK(S)
14A
ANNOUNCEMENT SYSTEM
OVERVIEW
This procedure verifies the operation of 14A announcement system ALD2 circuit pack(s) by first performing
diagnostics followed by a channel output transmission level test, if the
recommended
Bellcore Technical Advisory
standard transmission level is in use, and/or verification of the audio quality of the announcement. (See 201-521-101
for additional information on the 14A announcement system.)
PROCEDURE
1.
Notify office supervision that selected ALD2 circuit pack will be out of service.
2.
NOTE:
The ALD2 pack has a front panel mounted LED display
(See Figure 11.23-1 ) which shows the operational modes available. These various modes of
operation and their meanings are listed in Table 11.23-1 .
At front panel of ALD2 pack, press
MENU
pushbutton repeatedly until
CHK SYS
appears on display; then
press the
SELECT
pushbutton.
Comment:
If the display does not change when the
MENU
pushbutton is pressed, press the
SELECT
pushbutton and then the
MENU
pushbutton as above.
Response:
Selected ALD2 pack is removed from service.
A complete diagnostic test of the ALD2 pack is started.
The first test is a visual check of the display. All the display LEDs are illuminated in a pattern
which first illuminates the even- numbered LEDs for 2 seconds and then illuminates the
odd-numbered LEDs for 2 seconds.
Display goes off for 2 seconds and then will read
STAND BY
.
When the diagnostic test is completed, the display will read
LOC MODE
if the diagnostic test
passed.
3.
Did the ALD2 circuit pack pass diagnostics?
If
YES
, go to Step 7.
If
NO
, continue with next Step.
4.
Notify office supervision that diagnostics failed for the selected ALD2 pack.
5.
Postpone further testing of this ALD2 pack until the error condition is corrected.
6.
Go to Step 33.
7.
NOTE:
The following test (Steps
8
through
14
) uses the Bellcore Technical Advisory standard
transmission level to the network of -24 dbm for special information tones (SITs) and -22 VU for
announcement messages. This test is
invalid
if using nonstandard SIT and announcement values.
Is the Bellcore Technical Advisory standard for SITs and announcement messages being used for this ALD2
pack?
235-105-210
October 1999
Copyright © 1999
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