Support For Enhanced Link Noise Monitoring (Lnm) - Cisco MWR 1941-DC - 1941 Mobile Wireless Router Software Configuration Manual

New Features in Cisco IOS Release 12.2(15)MC2h
Command
Router(config-if)# ip rtp compression-connections
number
To restore the default value, use the no form of this command.

Support for Enhanced Link Noise Monitoring (LNM)

With Cisco IOS Release 12.2(15)MC2h, LNM algorithm support has been changed or updated. There is
no longer support for the existing or previous LNM algorithm. The enhanced LNM algorithm is now
supported by default. However, the existing or previous LNM CLI is still used to set the threshold and
duration values.
The averaging algorithm is responsible for maintaining the simple moving average of link quality Bit
Error Rate (BER), Line Code Violation/Path Code Violation (LCV/PCV) values as and when noise
samples arrive. The noise is calculated as a simple moving average for the duration configured. The
average noise at any time represents the noise average for the last configured duration in seconds. It is
recalculated each second as the noise samples arrive each second. Basically, it's a sliding window of
noise averages for the last duration in seconds.
The Benefits of this new algorithm are the following:
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Cisco MWR 1941-DC Mobile Wireless Edge Router Software Configuration Guide
1-12
Improves CDMA backhaul link robustness by detecting noisy spans and removing them out of
service 100 percent of the time and restoring them back 100 percent of the time when the link quality
reaches an acceptable value.
Improves CDMA Link Noise Monitoring Capability through intelligent threshold setting by using
the averaging algorithm and providing better detection at a wide range of Bit Error Rate levels.
100 percent detection at the Threshold which the customer sets to.
Alerts the customer 100 per cent of the time about the quality of the spans.
Removes the degraded span effectively and having only acceptable spans in service.
Chapter 1 Overview of the Cisco MWR 1941-DC Router
Purpose
Number of RTP header compression connections the cache
supports in the range of 3 to 1800.
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