Nortel 2001 Installation And Operation Manual page 232

Page 232 of 430
QoS tab
553-3001-368 Standard 7.00
Nortel IP Softphone 2050
Assign the QoS settings using the QoS tab (see Figure 29 on
the Enable check box if the IP Softphone 2050 is in a QoS-enabled network.
When selected, the IP Softphone 2050 uses the DSCP values configured at the
operating system level. If not selected, 0 is put in the DSCP field in outgoing
packets.
Not all operating systems allow assignment of all QoS settings. The
Configuration Utility allows settings only applicable to specific operating
systems to be assigned. The only possible assignments in Windows 2000
Professional are 802.1Q and DiffServ.
Note: Administrator privileges are required to set 802.1Q and DiffServ.
Prerequisites for Windows 2000 Professional 802.1Q/DiffServ:
To enable QoS on Windows 2000 Professional, the administrator must install
the QoS Packet Scheduler as follows:
• Open the Windows Network Properties and click Install....
• In the Select Network Component Type dialog box, choose Service
and click Add....
• In Select Network Service dialog box, choose QoS Packet Scheduler
and click OK.
Note: The Windows 2000 Professional CD-ROM may be required.
QoS registry settings assigned by the Configuration Utility
802.1Q and DiffServ on Windows 2000 Professional - Windows 2000
Professional requires a system-wide registry key setting to enable QoS
capabilities. This value can be created and modified only with Administrator
privileges. The key is:
HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services/
Qossp/EnablePriorityBoost
August 2005
page 233). Select