Carrier Access SNMP manual Self Test Loopbacks

Self Test Loopbacks

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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