Cisco 7925G - Manual (Page 15)

8-15
Cisco Unified Wireless IP Phone 7925G Administration Guide for Cisco Unified Communications Manager 7.0(1)
OL-15984-01
Chapter 8 Viewing Security, Device, Model, Status, and Call Statistics Information on the Phone
Viewing the 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 (value1/value2) Estimated average RTP packet jitter (dynamic delay that a packet
encounters when going through the network).
• Value 1 is the average jitter in milliseconds (ms).
• Value 2 is the current audio frame buffer depth in millisecond
(ms).
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
MOS LQK Score that is an objective estimate of the mean opinion score (MOS)
for listening quality (LQK) that rates from 5 (excellent) to 1 (bad).
This score is based on audible concealment events due to frame loss
in the preceding 8-second interval of the voice stream. For more
information, see the
“Monitoring the Voice Quality of Calls” section
on page 10-12 .
Note The MOS LQK score can vary based on the type of codec
that the Cisco Unified IP Phone uses.
Avg MOS LQK Average MOS LQK score observed for the entire voice stream.
Min MOS LQK Lowest MOS LQK score observed from start of the voice stream.
Max MOS LQK Baseline or highest MOS LQK score observed from start of the
voice stream.
These codecs provide the following maximum MOS LQK score
under normal conditions with no frame loss:
• G.711 gives 4.5
• G.729 A /AB gives 3.7
MOS LQK Version Version of the Cisco proprietary algorithm used to calculate MOS
LQK scores.
CumConcealRatio Total number of concealment frames divided by total number of
speech frames received from start of the voice stream.
Table 8-6 Call Statistics Items (continued)
Item Description