ATCOM 5520 User Manual page 45

VLAN Enable：Before select it to enable VLAN, you need enable Bridge
mode in LAN config.
VLAN ID Check Enable：Enable VLAN ID check by selecting it. After
enable VLAN ID check, if VLAN ID of a data package is not the same with
the phone's or a data package do not have VLAN ID, the data package will
be discarded.
Voice/Data VLAN differentiated：After enable VLAN, system will set
packets with different type of VLAN ID. Undifferentiated means after using
VLAN, both voip packets and other data packets will use the voice VLAN ID;
tag differentiated means after using VLAN, VoIP(signal and voice) packets
will add voice VLAN ID, and other data packets will add data VLAN ID; data
untagged means after using VLAN, only VoIP packets will add voice VLAN
ID. Other data packets will not use VLAN.
DiffServ Enable：Select it or not to Enable or disable DiffServ.
DiffServ Value：Set DiffServ value, the common value is 0x00.
Voice 802.1P Priority：Specify 802.1P Priority of voice/signal data
package.
Data 802.1P Priority：Set 802.1p of data VLAN. Non-voip data (such as
http, telnet, ping etc) will use this value to set VLAN package.
Voice VLAN ID：Set VLAN ID of voice/signal data package.
Data VLAN ID：Set 802.1q of data VLAN ID. Non-VoIP data (such as http,
telnet, ping etc) will use this value to set VLAN package.
：
1）Enable VLAN, if set Voice and Data VLAN differentiated as Undifferentiated, all
packets will use the Voice VLAN ID as the tag.
2) Enable VLAN, if set Voice and Data VLAN differentiated as tag differentiated and
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