Carrier Access Access Bank II SNMP - Manual (Page 124)

Self Test Fault Indications
9/24/01 12-3
2. Verify that T1 Test 1 or T1 Test 2 LED turns green after approximately 16 seconds.
12.3.2 Card Self Test
At the start of the self test sequence, when the Controller asserts the self test bit toward the voice
card, the following events occur on a per channel basis:
• The voice card reads from the Controller and sees the self test flag at logic 1 (active).
• The received A/B signaling bits are not processed since the signaling state machine is
skipped in software.
• The outputs of the signaling state machine are forced to:
Table 12-1: Card Self Test Signaling States
12.4 Self Test Fault Indications
12.4.1 Voice Channel LED is RED during Self Test
During Self-Test, a red channel LED may come on, but does not indicate a problem.
12.4.2 No Test Tone During a Self Test
If no ringback tone is present at the drop for a particular voice channel during a self test, there may be
an open or broken pair in the voice cable. If no test tone is present on any channel during a self test,
the voice cable may be disconnected. To correct the problem:
1. Check the voice cable for a loose connection.
2. Check the voice cable for a broken/open pair.
3. If no test tone is present on a set of 12 channels during a self test, the associated voice card
may be faulty. Try replacing the voice card.
Signaling Output
Ringing voltage OFF
Tip Lead GROUNDED
Quiet Channel OFF
Ringback ON
A bit to network ZERO
B bit to network ONE
T1 Test 1 LED RED (failure)
T1 Test 2 LED RED (failure)