Configuring QoS settings on the Sametime Connect or Notes-embedded client

Configure QoS (quality of service) settings on the IBM® Sametime® Connect client or the IBM Notes-embedded client by using the managed-settings.xml file which is only supported on Mac OS. For Microsoft Windows, the Sametime client uses the Windows Audio/Video QoS settings.

About this task

For information about the Windows Audio/Video QOS settings, see the Microsoft documentation Overview of Policy-Based QoS.

To configure QoS settings on the Mac, update the managed-settings.xml file and push it to clients as described in the topic Automatically updating client preferences with the managed-settings.xml file in the Configuring Sametime Connect Client preferences with the Expeditor managed settings framework section of this documentation.

In Sametime, you can configure QoS using DIFFSERV values, which are the decimal equivalents of hexadecimal DSCP codes. Use the following table to determine the DIFFSERV values that correspond to the DSCP codes that you want to use.

Table 1. DSCP codes and their corresponding DIFFSERV valuesThe DSCP codes are grouped by CS (Class of Service) level and range from 0 through 56.
DSCP code DIFFSERV value
Default 0
CS1 8
AF11 10
AF12 12
AF13 14
CS2 16
AF21 18
AF22 20
AF23 22
CS3 24
AF31 26
AF32 28
AF33 30
CS4 32
AF41 34
AF42 36
AF43 38
CS5 40
EF 46
CS6 48
CS7 56

For Microsoft Windows, the Sametime client uses the Windows Audio/Video QoS type; the corresponding DSCP type is 0x28. For details, see the Windows documentation on the QOS_TRAFFIC_TYPE enumeration.

The managed-settings.xml file is typically stored on the Sametime Community Server or on any other HTTP site.

Procedure

  1. Open the managed-settings.xml file in a text editor.
  2. In the managed-settings.xml file, locate the QOSEnable setting.
  3. Set the QOSEnable value to true.
  4. Set the audio value to the DIFFSERV value that you are using for audio transmissions.
  5. Set the video value to the DIFFSERV value that you are using for video transmissions.
  6. Set the servicetype value to DIFFSERV.
  7. Save and close the file.
  8. To allow the settings to effect on the users' Sametime clients, restart the Sametime clients.