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Palladion/Oracle Communications Session Monitor reports low MOS/Voice Quality because of Packet Loss (Doc ID 1990734.1)

Last updated on AUGUST 21, 2023

Applies to:

Oracle Communications Session Monitor - Version 3.3.x and later
Information in this document applies to any platform.

Goal

This article concerns the following issue: Palladion/OCSM displays bad Voice Quality (VQ) statistics caused by packet loss, but at the same time customer's analysis show that all the packets have arrived correctly to Palladion/OCSM

Solution

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In this Document
Goal
Solution
 1. If the Voice Quality issue started after an upgrade from a version < 3.3.80.0.0 to a version >= 3.3.80.0.0
 1.1 Make sure you upgrade to the latest version
 1.2 Improved skew calculation as of 3.3.80.0.0 may cause OCSM/Palladion to report worse Voice Quality statistics
 2. The jitter buffer size
 More about skew
 Positive/negative skew values
 High skew increase - considering the RTP stream gap/re-sync for the Wireshark analysis
 Packet rate estimations and issues if delta is too variable
 Versions before 3.3.93.0.0
 Versions starting with 3.3.93.0.0
 3. The time setting
 4. Other causes for packets to get discarded by the Jitter Buffer
References


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