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Maintenance Object Repair Procedures
140AY Loop Around Test (#210)
This test checks the integrity of the record channel on the Announcement circuit
pack (Announcement Port 1). The main function of the 140AY device is to accept
Pulse Code Modulation (PCM)/Adaptive Differential Pulse Code Modulation
(ADPCM) samples and compress/expand the samples using ADPCM. This test
connects a Tone Generator to one port (Announcement Port 1, the recording
port), and a Tone Detector to another port (Announcement Port 9). A tone is
generated by the Tone Generator on the first port and looped through the 140AY
device to the second port. The Tone Detector then responds with a tone
present/absent message. The 140AY Loop Around Test is repeated at three
different speech compression rates.
Since this test involves sending a tone through two different ports, the Playback
Speech Memory Array (PSMA) Test (#206) [see ANN-PT (Announcement Port)
Maintenance documentation for a description of this test] is run on the two ports
first to make sure that they are working properly.
Table 10-48. TEST #210 140AY Loop Around Test
Error
Code
1-3
10
90
1000
10-146
Issue 4 May 2002
Test
Result
ABORT
Response to the test request was not received within the
allowable time period. The error code indicates at which
speech compression rate the test aborted (one being the first
rate tested, three being the last).
1. Retry the command at 1-minute intervals a maximum of 5
times.
ABORT
The PSMA Test (#206) failed on Announcement Port 1.
ABORT
The PSMA Test (#206) failed on Announcement Port 9.
1. Refer to "ANN-PT (Announcement Port)" Maintenance
documentation, Test #206.
ABORT
System resources required to run this test are not available.
This test needs Announcement Ports 1 and 9 to run. One of
the ports may be in use on a valid call.
1. Retry the command at 1-minute intervals a maximum of 5
times.
2. If the test continues to abort and Ports 1 and 9 are not in
use, escalate the problem.
Description/Recommendation
Continued on next page
555-233-123
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