Voice VLAN (Voice VLAN) is a VLAN (virtual local area network) specially designed to carry client voice traffic. When configuring a Voice VLAN and including ports with VoIP equipment in this VLAN, the user gets the opportunity to configure the quality of service (QoS) parameters for voice data and increase the priority of voice traffic, thereby improving call quality.

How does voice VLAN work?

To prioritize voice streams, they must first be identified. The Business VoIP VLAN can identify the voice data stream in two ways: one is by determining the source MAC address of the received packet (MAC address-based mode), and the other is by identifying the VLAN tag of the received packet (VLAN-based mode).