Carrier Access Access Bank II SNMP - Manual (Page 96)

Self Test Loopbacks
9/24/01 9-23
Danger: Four seconds of continuous ringing voltage (85 V) will be present
at the Tip and Ring pair of the channel-under-test until the test telephone is
picked up to trip the ringing.
Requirement: A test telephone connected to the punch down block or RJ-11
Harmonica should ring for 4 seconds.
3. As an aid to network technicians troubleshooting audio problems, 4 seconds of continuous
ringback tone are also sent toward the T1 network.
4. After the 4 seconds of continuous ringback tone, the FXS channel will “busy out” toward the
T1 network side.
Note: Each channel test switch can provide ringing during Trunk Processing (or
even when the T1 line is disconnected).
9.9 Self Test Loopbacks
If a Self-Test is in progress and Switch A is ON, setting a channel test switch to the ON position
should have the following result:
The affected channel receives 4 seconds of continuous ringing voltage (85 V) and the LED for that
particular channel turns RED. This allows a technician to ring the telephone and verify audio tone
when it is answered.
Note: During Self Test, a RED channel LED may come on, but does not indicate a
problem.
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