ANL-LINE, ANL-NE-L (8-Port Analog Line)
Issue 1 May 2002
8-93555-233-143
The noise test is performed by filtering out the tone, and then measuring inherent
port noise.
NOTE:
This loop-around test is sensitive to the length of the loop, the equipment in
the loop, or the equipment terminating the loop, such as off-premises
stations. If this test is causing a false alarm, then disable the test by
changing the Tests field to “no” using the change station command for this
station.
Figure 8-1. Analog Looparound and Conference Test
TDM BUS
BFC: Battery Feed Chip
NPE: Network Processing Element
Analog
Line
Port
BFC
CODEC
NPE Tone
Generator
Tone
Detector
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