Vlan (Virtual Lan) - Panasonic KX-TDA50 Manual

1.2.2

VLAN (Virtual LAN)

VLANs are logical segments within a corporate LAN. By assigning VLAN settings to IP-PTs, it is possible to
separate the packets transmitted by an IP-PT according to the type of data, and specify which VLAN each
data type will be sent over. This allows you to avoid generating unnecessary network traffic on each
segment, and to reduce the load on the network. As a consequence, speech quality can be assured.
Therefore, we recommend using the VLAN feature to perform VoIP communication effectively.
Some IP-PTs (e.g., KX-NT136) are equipped with 2 ports, primary and secondary, for packet
communication. Allocating these ports to different VLANs enables you to split the paths for packets
depending on whether the packet contains voice signals or data.
VLAN settings (VLAN ID and VLAN priority) for the primary port affect voice data transmitted by the IP-PT,
whereas VLAN settings for the secondary port apply to data transmitted by a PC connected to the IP-PT.
When sending packets, the IP-PT can attach information on which VLAN the packets are to be transmitted
over (VLAN Tagging). The switching hub that receives these packets reads the VLAN information and sends
the packets over the appropriate VLAN. This helps to ensure bandwidth for IP-PT voice transmissions.
In this way, an IP-PT with 2 ports can transmit voice packets from the primary port with higher priority than
other packets from the secondary port.
VLAN 1
Segment for Voice Data
Switching Hub
VLAN 1
Hybrid IP-PBX
IP-PT with 2 ports
Notes
• This VLAN feature complies with IEEE (Institute of Electrical and Electronics Engineers) 802.1Q.
Voice Packet
Primary Secondary
VLAN 2
Segment for Other Data
VLAN 2
PC
Other Packet
Other Packet
PC
Information about IP Proprietary Telephones
1.2 Network Management
9