TechContrarian

In order to mark Audio and Video packets for DSCP in OC 2007 R2 â?? the following steps has to be performed on Vista SP1 and SP2 PCs:

1)    Create and update the following key : (32 bit DWORD set to)

a.    HKEY_LOCAL_MACHINE\Software\Microsoft\RTC\Transport\QoSEnabled

b.    Set 32 bit Dword to 1 to enable

c.    Reboot PC â?? (this will not take effect until rebooted)

After the reboot, RTP Media will be marked with the following default values: (which can be changed)

1)    Audio calls will be marked with DSCP 40

2)    Video will be marked with DSCP 24

These default values can be changed by going to Group Policy and changing the default value show below:

Setting SIP [...]