H3C Technologies H3C S5560 Series Switches - Manual (Page 204)

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• If the voice VLAN configuration is based on the voice VLAN information of the accessing port, the
voice traffic from the IP phone will be forwarded in the voice VLAN of the accessing port. Whether
the voice packets are tagged depends on the voice VLAN configuration of the accessing port. For
more information about configuring a voice VLAN on a port, see "Configuring a voice VLAN on a
port."
IP phone access methods
Connecting the host and the IP phone in series
As shown in Figure 52 , the host is connected to the IP phone, and the IP phone is connected to the device.
In this scenario, the following requirements must be met:
• The host and the IP phone use different VLANs.
• The IP phone is able to send out VLAN-tagged packets, so that the device can differentiate traffic
from the host and the IP phone.
• The port connecting to the IP phone forwards packets from the voice VLAN and the PVID.
Figure 52 Connecting the host and IP phone in series
Connecting the IP phone to the device
As shown in Figure 53 , the IP phone is connected to the device without the presence of the host. Use this
connection method when the IP phone sends out untagged voice packets. In this scenario, you must
configure the voice VLAN as the PVID of the port, and configure the port to forward the packets from the
PVID.
Figure 53 Connecting the IP phone to the device