Connecting The Ip Phone To The Device; Voice Vlan Assignment Modes; Automatic Mode - H3C S7500E-X Configuration Manual

Figure 50 Connecting the host and IP phone in series
Host

Connecting the IP phone to the device

As shown in
this connection method when IP phones sends out untagged voice packets. In this scenario, you
must configure the voice VLAN as the PVID of the access port of the IP phone, and configure the port
to forward the packets from the PVID.
Figure 51 Connecting the IP phone to the device

Voice VLAN assignment modes

A port can be assigned to a voice VLAN automatically or manually.

Automatic mode

Use automatic mode when PCs and IP phones are connected in series to access the network
through the device, as shown in
traffic.
When an IP phone is powered on, it sends out protocol packets. After receiving these protocol
packets, the device uses the source MAC address of the protocol packets to match its OUI
addresses. If the match succeeds, the device performs the following operations:
•
Assigns the receiving port of the protocol packets to the voice VLAN.
•
Issues ACL rules to set the packet precedence.
•
Starts the voice VLAN aging timer.
If no voice packet is received from the port before the aging timer expires, the device will remove the
port from the voice VLAN. The aging timer is also configurable.
IP phone
Figure 51, IP phones are connected to the device without the presence of the host. Use
Figure
Voice gateway
Device
50. Ports on the device transmit both voice traffic and data
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