What is a voice VLAN of an AR router


A voice VLAN is divided for user voice data flow. By creating such a voice VLAN and adding the interface that connects to a voice device to the voice VLAN, voice data flow can be transmitted on the voice VLAN to ensure transmission quality.

Other related questions:
What are the differences between a bridge on an AR router and a VLAN
A bridge on an AR router can forward WAN packets in Layer 2. In addition, Layer-3 interfaces can be added into a bridge, which is different from a VLAN into which only Layer-2 interfaces can be added.

What is the voice VLAN
A voice VLAN refers to a VLAN used to transmit voice data flows. You can create a voice VLAN and add the interface connected to a voice device to the voice VLAN. Then voice data flows can be transmitted on the voice VLAN, ensuring the voice data transmission quality.

VLAN configuration on an AR router
If interfaces cannot implement Layer 2 and Layer 3 conversion, enable the sub-interface or route interconnection function. For details, see the URL: Example for Configuring VLANs to Communicate Through Sub-interfaces .

Voice VLAN priority modification method on an AR router
Voice VLAN priority configuration methods for low-end AR devices and high-end AR devices are different. - For high-end devices such as AR2200, AR3200, and AR3600, their chips support ACL. After an interface is added to the voice VLAN, packet priorities can be changed to 6 by default based on the ACL or defined by running the voice-vlan remark command. - For low-end devices such as AR120, AR150, AR160, AR200, AR500, and AR1200, their chips do not support ACL. Therefore, packet priorities cannot be automatically changed but can be defined by running the vlan priority command.

How to configure the voice function on the AR router
1. Configure the AR router to work in PBX, SIP AG, or H248 AG mode. 2. Configure initial information, such as media and signaling IP address pools, country code and area code, enterprise, and DN set. 3. Configure the SIP server. 4. Configure users. 5. Configure a call prefix. 6. Configure a trunk group. 7. Configure a call route.

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