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Media Quality Summary Report

 

Topic Last Modified: 2012-05-21

The Media Quality Summary Report provides overall quality data for different endpoint types, including Enterprise Voice peer-to-peer calls,, Enterprise Voice conference calls, and calls that rely, at least in part, on the public switched telephone network (PSTN).

Filters provide a way for you to return a more finely-targeted set of data or to view the returned data in different ways. For example, the Media Quality Summary Report enables you to filter the returned data by such things as access type (that is, interval access vs. external access) or by wired/wireless network connection. You can also choose how data should be grouped. In this case, calls are grouped by hour, day, week, or month.

The following table lists the filters that you can use with the Media Quality Summary Report.

Media Quality Summary Report Filters

Name Description

From

Start date/time for the time range. To view data by hours, enter both the start date and time as follows:

1/1/2011 1:00 PM

If you do not enter a start time, the report automatically begins at 12:00 AM on the specified day. To view data by day, enter just the date:

1/1/2011

To view by week or by month, enter a date that falls anywhere within the week or month that you want to view (you do not have to enter the first day of the week or month):

1/3/2011

Weeks always run from Sunday through Saturday.

To

End date/time for the time range. To view data by hours, enter both the end date and time as follows:

1/1/2011 1:00 PM

If you do not enter an end time, the report automatically ends at 12:00 AM on the specified day. To view data by day, enter just the date:

1/1/2011

To view by week or by month, enter a date that falls anywhere within the week or month that you want to view (you do not have to enter the first day of the week or month):

1/3/2011

Weeks always run from Sunday through Saturday.

Access type

Indicates whether the client was logged on to the internal network or the external network when the call was placed. Select one of the following:

  • [All]

  • Internal

  • External

Network type

Indicates the type of network the client was connected to when the call was placed. Select one of the following:

  • [All]

  • Wired

  • Wireless

VPN

Indicates whether an external client was using a virtual private network (VPN) connection when the call was placed. Select one of the following:

  • [All]

  • VPN

  • Non-VPN

The following table lists the information provided in the Media Quality Summary Report.

Media Quality Summary Report Metrics

Name Can you sort on this item? Description

Call type/Endpoint type

No

When you click this item, the report shows detailed information about calls based on that type. Call types include:

  • UC Peer-to-Peer Calls

  • UC Conference Sessions

  • PSTN Conference Sessions

  • PSTN Calls: Media Bypass

  • PSTN Calls (Non-Bypass): UC Leg

  • PSTN Calls (Non-Bypass): Gateway Leg

  • Other Call Types

Call volume

No

Total number of calls per call type.

Poor call percentage

No

Total number of calls classified as poor. A poor call is any call which at least one of the measured metrics exceeded the allowed value (for example, a call that experienced excessive jitter).

Call volume (wireless call)

No

Total number of calls that used a wireless connection.

Call volume (VPN call)

No

Total number of calls that used a VPN connection.

Call volume (external call)

No

Number of calls that used an external connection (that is, a connection outside the internal network).

Round trip (ms)

No

Average amount of (in milliseconds) required for a real-time transport protocol (RTP) packet to travel to another endpoint and then back. Round-trip times of 100 milliseconds or less are considered of acceptable quality.

High round-trip values can be caused by international call routing, a routing misconfiguration, or an overloaded media server. High round-trip times result in difficulties with two-way, real-time audio conversations.

Degradation (MOS)

No

Average amount of mean opinion score (MOS) degradation experienced during a call. Degradation values can range from a low of 0.0 to a high of 5.0. A value of 0.5 or less represents acceptable degradation. Historically, mean options scores were calculated by having users rate the quality of a call on a scale of 1-to-5. In Microsoft Lync Server 2010, the Monitoring Server uses a set of algorithms to predict how users would have rated a call.

High degradation values can be caused by congestion, lack of bandwidth, wireless congestion or interference, or an overloaded media server or endpoint. High degradation results in distorted or lost audio.

Packet loss

No

Average rate of RTP packet loss. (Packet loss occurs when RTP packets, a protocol used for transmitting audio and video across the Internet, failed to reach their destination.) High loss rates are generally caused by congestion, lack of bandwidth, wireless congestion or interference, or an overloaded media server. Packet loss typically results in distorted or lost audio.

Jitter

No

Average jitter detected between RTP packet arrivals. (Jitter is a measure of the "shakiness" of a call.) High jitter values are typically caused by congestion or an overloaded media server, and result in distorted or lost audio.

Healer concealed ratio

No

Average ratio of concealed audio samples to the total to the total number of samples. (A concealed audio sample is a technique used to smooth out the abrupt transition that would usually be caused by dropped network packets.) High values indicate significant levels of loss concealment applied caused by packet loss or jitter, and results in distorted or lost audio.

Healer stretched ratio

No

Average ratio of stretched audio samples to the total to the total number of samples. (Stretched audio is audio that has been expanded to help maintain call quality when a dropped network packet has been detected.) High values indicate significant levels of sample stretching caused by jitter, and result in audio sounding robotic or distorted.

Healer compressed ratio

No

Average ratio of compressed audio samples to the total number of samples. (Compressed audio is audio that has been compressed to help maintain call quality when a dropped network packet has been detected.) High values indicate significant levels of sample compression caused by jitter, and result in audio sounding accelerated or distorted.

 
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