Streaming Statistics


A Cisco Unified IP Phone can stream information to and from up to three devices simultaneously. A phone streams information when it is on a call or running a service that sends or receives audio or data.


The streaming statistics areas on a phones web page provide information about the streams. Most calls use only one stream (Stream 1), but some calls use two or three streams. For example, a barged call uses Stream 1 and Stream 2.


To display a Streaming Statistics area, access the web page for the phone as described in the Access Web Page for Phone, and then click the Stream 1, the Stream 2, the Stream 3, the Stream 4, or the Stream 5 hyperlink.


The following table describes the items in the Streaming Statistics areas.


Item

Description


Remote Address


IP address and UDP port of the destination of the stream.


Local Address

 
IP address and UPD port of the phone.
                                 


Start Time


Internal time stamp indicating when Cisco Unified Communications Manager requested that the phone start transmitting packets.


Stream Status

 
Indication of if streaming is active or not.


Host Name


Unique, fixed name that is automatically assigned to the phone based on its MAC address.


Sender Packets


Total number of RTP data packets transmitted by the phone since starting this connection. The value is 0 if the connection is set to receive only mode.

 
Sender Octets


Total number of payload octets transmitted in RTP data packets by the phone since starting this connection. The value is 0 if the connection is set to receive only mode.


Sender Codec

 
Type of audio encoding used for the transmitted stream.


Sender Reports Sent (see note)


Number of times the RTCP Sender Report have been sent.


Sender Report Time Sent
(see note)
 

 
Internal time stamp indication when the last RTCP Sender Report was sent.

 
Rcvr Lost Packets


Total number of RTP data packets that have been lost since starting receiving data on this connection. Defined as the number of expected packets less the number of packets actually received, where the number of received packets includes any that are late or duplicate. The value displays as 0 if the connection was set to send-only mode.


Avg Jitter


Estimate of mean deviation of the RTP data packet interarrival time, measured in milliseconds. The value displays as 0 if the connection was set to send-only mode.


Rcvr Codec

 
 Type of audio encoding used for the received stream.


Rcvr Reports Sent (see note)

 
Number of times the RTCP Receiver Reports have been sent.


Rcvr Report Time Sent
(see note)

 

 

Internal time stamp indication when a RTCP Receiver Report was sent.

 
Rcvr Packets


Total number of RTP data packets received by the phone since starting receiving data on this connection. Includes packets received from different sources if this is a multicast call. The value displays as 0 if the connection was set to send-only mode.


Rcvr Octets


Total number of payload octets received in RTP data packets by the device since starting reception on the connection. Includes packets received from different sources if this is a multicast call. The value displays as 0 if the connection was set to send-only mode.


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 
Voice Quality Monitoring


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 on the Cisco Unified IP Phones 7962G and 7942G provide the following maximum MOS LQK score under normal conditions with no frame loss: 

  • G.711 gives 4.5 G.722 gives 4.5 
  • G.728/iLBC gives 3.9 
  • G.729 A/AB gives 3.8 


These codecs on the Cisco Unified IP Phones 7961G/G-GE and 7941G/41G-GE 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.


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).

 
Latency (see note)


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.


Max Jitter


Maximum value of instantaneous jitter, in milliseconds.


Sender Size


RTP packet size, in milliseconds, for the transmitted stream.

 
Sender Reports Received
(see note)


Number of times RTCP Sender Reports have been received.


Sender Report Time Received (see note)


Last time at which an RTCP Sender Report was received.

 
Rcvr Size


RTP packet size, in milliseconds, for the received stream.


Rcvr Discarded


RTP packets received from network but discarded from jitter buffers.


Rcvr Reports Received
(see note)


Number of times RTCP Receiver Reports have been received.


Rcvr Report Time Received (see note)

 
Last time at which an RTCP Receiver Report was received.


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 
Voice Quality Monitoring.


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 for the Cisco Unified IP Phones 7962G and 7942G provide the following maximum MOS LQK score under normal conditions with no frame loss:

  • G.711 gives 4.5
  • G.722 gives 4.5
  • G.728/iLBC gives 3.9
  • G.729 A/AB gives 3.8

 

These codecs for the Cisco Unified IP Phones 7961G/G-GE and 7941G/G-GE 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.


Cmltve 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.


Note When the RTP Control Protocol is disabled, no data generates for this field and thus displays as 0


Related Topics

Cisco Unified IP Phone Settings

Features, Templates, Services, and Users

Call Statistics Screen

Voice Quality Monitoring