Cisco 6921 Administration Manual page 103

Chapter 7 Viewing Model Information, Status, and Statistics on the Cisco Unified IP Phone
To display the Call Statistics screen for information about the latest voice stream, follow these steps:
Procedure
Step 1 Press the Applications button.
Select Admin Settings.
Step 2
Select Status.
Step 3
Select Call Statistics.
Step 4
The Call Statistics screen displays these items:
Table 7-4
Item
Rcvr Codec
Sender Codec
Rcvr Size
Sender Size
Rcvr Packets
Sender Packets
Avg Jitter
Max Jitter
Rcvr Discarded
Rcvr Lost Packets
Voice Quality Metrics
Cisco Unified IP Phone 6921, 6941, and 6961 Administration Guide for Cisco Unified Communications Manager 7.1 (SCCP)
OL-19025-01
Call Statistics Items for the Cisco Unified Phone 6900 Series
Description
Type of voice stream received (RTP streaming audio from codec):
G.729, G.711 u-law, G.711 A-law.
Type of voice stream transmitted (RTP streaming audio from
codec): G.729, G.711 u-law, G.711 A-law.
Size of voice packets, in milliseconds, in the receiving voice stream
(RTP streaming audio).
Size of voice packets, in milliseconds, in the transmitting voice
stream.
Number of RTP voice packets received since voice stream was
opened.
Note This number is not necessarily identical to the number of
RTP voice packets received since the call began because the
call might have been placed on hold.
Number of RTP voice packets transmitted since voice stream was
opened.
This number is not necessarily identical to the number of
Note
RTP voice packets transmitted since the call began because
the call might have been placed on hold.
Estimated average RTP packet jitter (dynamic delay that a packet
encounters when going through the network) observed since the
receiving voice stream was opened.
Maximum jitter observed since the receiving voice stream was
opened.
Number of RTP packets in the receiving voice stream that have been
discarded (bad packets, too late, and so on).
The phone will discard payload type 19 comfort noise
Note
packets that are generated by Cisco Gateways, which will
increment this counter.
Missing RTP packets (lost in transit).
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