1-5 
Table 1-2 Matching relationship between port types and voice devices capable of acquiring IP address 
and voice VLAN automatically 
Voice VLAN 
assignment 
mode 
Voice 
traffic 
type 
Port type Supported or not 
Access Not supported 
Trunk 
Supported 
Make sure the default VLAN of the port exists and is not 
a voice VLAN, and the access port permits the traffic of 
the default VLAN. 
Tagged 
voice 
traffic 
Hybrid  
Supported 
Make sure the default VLAN of the port exists and is not 
a voice VLAN, and the default VLAN is in the list of the 
VLANs whose traffic is permitted by the access port. 
Access 
Trunk 
Automatic 
Untagge
d voice 
traffic 
Hybrid 
Not supported, because the default VLAN of the port 
must be a voice VLAN and the access port is in the voice 
VLAN. This can be done by adding the port to the voice 
VLAN manually. 
Access   Not supported 
Trunk 
Supported 
Make sure the default VLAN of the port exists and is not 
a voice VLAN, and the access port permits the traffic of 
the default VLAN and the voice VLAN. 
Tagged 
voice 
traffic 
Hybrid  
Supported 
Make sure the default VLAN of the port exists and is not 
a voice VLAN, the traffic of the default VLAN is permitted 
to pass through the port, and the voice VLAN is in the list 
of the tagged VLANs whose traffic is permitted by the 
port. 
Access 
Supported 
Make sure the default VLAN of the port is a voice VLAN.
Trunk  
Supported 
Make sure the default VLAN of the port is a voice VLAN 
and the port permits the traffic of the VLAN. 
Manual 
Untagge
d voice 
traffic 
Hybrid 
Supported 
Make sure the default VLAN of the port is a voice VLAN 
and is in the list of untagged VLANs whose traffic is 
permitted by the port. 
 
IP phones acquiring IP address and voice VLAN through manual configuration can forward only tagged 
traffic, so the matching relationship is relatively simple, as shown in 
Table 1-3: