Hi, friend!
CPIF (Calculated Planning Impairment Factor) value is an advantage factor and MOS (Mean Opinion Score) is an average estimatation of the VoIP performance.
MOS measures the subjective call quality for a call. MOS scores range from 1 for unacceptable to 5 for excellent. VOIP calls often are in the 3.5 to 4.2 range. The ITU P.861 (PSQM) and P.862 standards explain how to calculate MOS scores.
MOS

ICPIF
