Ip Softphone 2050 Support; Three-Port Switch Support - Nortel 2033 Installation And Operation Manual

Page 486 of 600

IP Softphone 2050 support

Three-port switch support

553-3001-368 Standard 20.00
Appendix B: 802.1Q VLAN description
The IP Softphone 2050 supports 802.1Q with Windows 2000. By default,
when 802.1Q is enabled, the priority bits of all frames are set to 6 and the
VLAN ID is set to 0 (a restriction of Windows 2000).
For more information, see the "Nortel IP Softphone 2050" on
The section refers to the following IP Phones:
• IP Phone 2002
• IP Phone 2004
• IP Phone 2007
• IP Phone 1120E
• IP Phone 1140E
• IP Phone 1150E
The three-port switch does not interpret the 802.1Q header, but rather, allows
the packets to pass through unmodified. Priority is achieved on a per port
basis. The phone "port" traffic has higher priority over the Ethernet port to
which the PC is connected.
An IP Phone can receive Broadcast frames from a PC's data VLAN. Any data
network broadcast storm packets from the network are seen by the IP Phone.
Significant broadcast storms occurring on the DATA VLAN can impact IP
Phone performance. Refer to "Enhanced VLAN Tagging" on
configuration information to filter network activity from impacting IP Phone
performance.
Enhanced 802.1P and 802.1Q support on the IP Phones improves voice
quality by taking advantage of the VLAN filtering available on the three-port
switch on the BCM 1100/1101/1103.
December 2006
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