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11-26
Surveyor
User’s Guide
Table 11-11. H.323, SIP, or UNKNOWN Channel Table Column Descriptions
Table Column Description
Channel Channel type, Audio, Video, or Data.
Min User R Factor The lowest User R-factor calculated during a sampling interval for a
call.
User R Factor Voice quality measure expressed as a numeric value between 0 and
94. The value is calculated by Surveyor. Surveyor uses a formula that
includes packet loss, jitter, transmission delay, and recency to deter-
mine the User R-factor.
Max User R Factor The highest User R-factor calculated during a sampling interval for a
call.
Min Network R Factor The lowest Network R-factor calculated during a sampling interval for a
call.
Network R Factor Voice quality measure expressed as a numeric value between 0 and
94. The value is calculated by Surveyor. Surveyor uses a formula that
includes packet loss, jitter, and transmission delay to determine the
Network R-factor.
Max Network R Factor The highest Network R-factor calculated during a sampling interval for
a call.
Estimated MOS A conversion of the combined R-factors to a Mean Opinion Score. The
MOS maps to a purely subjective evaluation of call quality where users
rate speech samples on a scale of 1 to 5.
Dst Addr The destination IP address.
Dst Port The destination UDP port.
Src Addr The source IP address.
Src Port The source UDP port.
Sync Source Synchronization source. Internal number identifying the source.
Packet Count Packet Count. The value is calculated by Surveyor.
Byte Count Byte Count. The value is calculated by Surveyor.
Dropped Packets Packets Dropped. The value is calculated by Surveyor.
Codec Codec/Decoder type. (DataType in H.245)
Jitter (ms) Jitter in milliseconds. The value is calculated by Surveyor. Surveyor
uses the formula described in RFC 1889 to calculate jitter.
Min Jitter (ms) Minimum Jitter in milliseconds. The value is calculated by Surveyor.
Surveyor uses the formula described in RFC 1889 to calculate jitter.