IBM 4.3-W User Manual
Chapter 7: Collection Formulas
Netcool/Proviso Cisco IP Telephony Technology Pack User’s Guide, Version 4.3-W
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MOS
Type
Import
Description
The mean opinion score (MOS). This is a high-level metric.
In voice communications, particularly internet telephony, the MOS provides a numeric measure of the quality of
human speech at the destination end of the circuit.
human speech at the destination end of the circuit.
There is no algorithm for MOS calculations. This is a subjective metric based on the end-user’s judgment of call
quality.
quality.
The scheme uses subjective scores that are mathematically averaged to obtain a quantitative indicator of the
performance. To determine MOS, a number of listeners rate the quality of test sentences read aloud over the
communications circuit by male and female speakers. Listeners give each sentence a rating as follows:
performance. To determine MOS, a number of listeners rate the quality of test sentences read aloud over the
communications circuit by male and female speakers. Listeners give each sentence a rating as follows:
•
1 (bad)
•
2 (poor)
•
3 (fair)
•
4 (good)
•
5 (excellent)
The MOS is the arithmetic mean of all the individual scores. It can range from 1 (worst) to 5 (best). In our context,
our MOS calculation is based on the consolidation of Jitter, latency, and packets lost, which give a good overview
of the real MOS value.
our MOS calculation is based on the consolidation of Jitter, latency, and packets lost, which give a good overview
of the real MOS value.
Syntax
#Bulk Metric
Generic Database Alias
None.
Formula Editor Path
AP > Specific > Bulk > VOIP > Cisco > CDR