Lucent Technologies 555-233-119 Tone Generator Transmission Test (#40)

DEFINITY ECS Release 8.2 Maintenance for R8.2csi 555-233-119 Issue 1
April 2000
Maintenance Objects
3-1142TONE-PT (Tone Generator)
3
Tone Generator Transmission Test (#40)
The purpose of this test is to verify that the tone g eneration hardware on the
tone-clock circ uit pack is cap able of generating a sub set of system tones and a
set of test tones. This test does not verify all system tones the tone g enerator
produces durin g normal system operation.
The test is performed in two parts. For the first p art, the Tone Generator is told to
generate the touch-tone dig its. The digits are received and checked by a Tone
Detector touch-tone detec tor. If any of the digits fail, th e test is repeated using a
touch-tone detector in another Tone Detector circuit pack.
For the second part, the Tone Generator is told to generate call progress tones
that are detected and identified by a tone d etector. These tones are:
■440 Hz
■2225 Hz
■Digital Count
The tone generator is then told to generate a seq uence of test tones whose
output levels are measured by a ton e detector. These tones are:
■404 Hz at 0 dB
■1004 Hz at -16 dB
■1004 Hz at 0 dB
■2804 Hz at 0 dB
A Tone Detector general purpose tone det ector listens for the tones and
measures the quality of the tone. If any of the measured v alues are not within
limits, the test is repeated using a general purpose ton e detector in a different
Tone Detector circuit pack. If the values are still out of the limits, the test will fail.
For all the failure cases of Test #40, do the following:
1. Check that all Tone Detector circuit pac ks have the same compand ing
mode as that administered fo r the system. Correct the situation if there is a
mismatch.
2. Run the long test sequence: test tone-clock PC long repeat 1.
3. If the problem persists, rep lace the Tone-Clock circuit pac k by following
the steps outlined in the ‘‘How to Replace a Tone-Clock Circuit Pack’’
section.