Altigen ACM 6.7 Administrator's Manual page 321

Virtual LANs
The NIC in both the MAXCS server and the IPTalk client (used with MaxCommunicator/
MaxAgent) must support 802.1p. To see if the NIC supports the 802.1p feature, open
the NIC's Properties dialog box and select the Advanced tab. See if the "QoS Packet
Tagging" property is in the Property list. (Different NICs have different properties and
may display a different property name for the 802.1p feature.) If the NIC supports the
802.1p feature, the default value is Disabled and you can change this value to enable
802.1p as seen in the following figure:
Once the 802.1p property is enabled, the operating system should notify the NetFilter
driver whether the NIC supports the 802.1p feature.
For 802.1p, eight different classes of service are available, expressed through the 3-bit
user priority field in an IEEE 802.1Q header added to the frame. In MAXCS, 802.1p
tagging is implemented in the NetFilter driver in the server side applying QoS tagging to
the voice packet. The IP phone tags the voice packet from the ARM processor with a user
configured value.
To specify the priority value
The server side configuration is located in the HMCP board's Board Configuration
settings or the VoIP board's Board Configuration > Advanced setting:
In MaxCommunicator/MaxAgent, the configuration is in the IPTalk configuration screen:
MAXCS ACM 6.7 Administration Manual 307