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Cisco Unified IP Phone 6921, 6941, and 6961 Administration Guide for Cisco Unified Communications Manager 7.1 (SCCP)
OL-19025-01
Chapter 7 Viewing Model Information, Status, and Statistics on the Cisco Unified IP Phone
Status Menu
Sender Packets
Number of RTP voice packets transmitted since voice stream was
opened.
Note
This number is not necessarily identical to the number of
RTP voice packets transmitted since the call began because
the call might have been placed on hold.
Avg Jitter
Estimated average RTP packet jitter (dynamic delay that a packet
encounters when going through the network) observed since the
receiving voice stream was opened.
Max Jitter
Maximum jitter observed since the receiving voice stream was
opened.
Rcvr Discarded
Number of RTP packets in the receiving voice stream that have been
discarded (bad packets, too late, and so on).
Note
The phone will discard payload type 19 comfort noise
packets that are generated by Cisco Gateways, which will
increment this counter.
Rcvr Lost Packets
Missing RTP packets (lost in transit).
Voice Quality Metrics
Cumulative Conceal Ratio
Total number of concealment frames divided by total number of
speech frames received from start of the voice stream.
Interval Conceal Ratio
Ratio of concealment frames to speech frames in preceding
3-second interval of active speech. If using voice activity detection
(VAD), a longer interval might be required to accumulate 3 seconds
of active speech.
Max Conceal Ratio
Highest interval concealment ratio from start of the voice stream.
Conceal Secs
Number of seconds that have concealment events (lost frames) from
the start of the voice stream (includes severely concealed seconds).
Severely Conceal Secs
Number of seconds that have more than 5 percent concealment
events (lost frames) from the start of the voice stream.
Latency
Estimate of the network latency, expressed in milliseconds.
Represents a running average of the round-trip delay, measured
when RTCP receiver report blocks are received.
Table 7-4
Call Statistics Items for the Cisco Unified Phone 6900 Series (continued)
Item
Description