Carrier Access Access Bank II SNMP, Installation And User Manual

Page: 85 / 180

FXS-ID Configuration
8-12 9/24/01
8.7.3 “Busying Out” Individual FXS Channels
Switching a channel test switch to the ON position has three results on the selected FXS channel:
1. To confirm individual channel circuit integrity, 4 seconds of ringing voltage are sent to the
Tip and Ring pair. The Tip is then grounded until the channel test switch is turned to the OFF
position (to the right).
Warning:
Four seconds of ringing voltage (85 V) will be present at the Tip
and Ring pair of the FXS 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.
2. As an aid to network technicians troubleshooting audio problems, 4 seconds of ringback tone
are also sent toward the T1 network.
3. After the 4 seconds of 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).
8.7.4 Self Test Loopbacks
During Self-Test, switching a channel test switch to the ON position has the following result:
The affected FXS channel receives 4 seconds of ringing voltage (85 V) and the LED for that particu-
lar 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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