UCM630X Series User Manual
Version 1.0.11.10
Three options are available:
• Ascend
When the call goes out from this analog trunk, it will always try to use the first idle
FXO port. The port order that the call will use to go out if UCM6302 is used would
be port 1→port 2→. Every time it will start with port 1 (if it is idle).
• Poll
When the call goes out from this analog trunk, it will use the port that is not used
last time. And it will always use the port in the order of port 1→2→1→2→1→2→...,
following the last port being used in case UCM6302, is used.
• Descend
When the call goes out from this analog trunk, it will always try to use the last idle
FXO port. The port order that the call will use to go out if UCM6302 is used would
be port 2→port 1. Every time it will start with port 2 (if it is idle).
The default setting is “Ascend” mode.
The Non-Linear Processing (NLP) in echo cancellation helps to remove/suppress
residual echo components that could not be removed by the LEC (Line Echo
Canceller). Following modes are supported:
• Default: The NLP limits the signal level to the background noise level when
active, and the background noise level adjustment is low.
• High Noise Level Adjustment: The NLP limits the signal level to the
background noise level when active, and the background noise level adjustment
is high.
• Noise Masking: The NLP sends sign noise when active, and the background
noise level adjustment is high.
• White Noise Injection: The NLP injects white noise when active. The level
corresponds to the background noise level at Sin, and the background noise
level adjustment is high.