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3.4 Utilizing QoS advantages
The PBX voice gateway is equipped with QoS capabilities. This provides higher priority for voice than data
from the LAN. However you must install the device according to the following diagram in order to give voice
output a higher priority than data output from a LAN. The "To WAN" Ethernet port on the front panel is used
to connect to the router. The "To LAN" Ethernet port that is near the RS-232 port on the front panel is used
to connect to the HUB or Switch on the LAN. This will give voice output a higher priority than data output.
Fig 9 Diagram shows the utilization of embedded QoS capabilities. To maintain QoS functions while
stacking the devices, you need to connect the LAN port of the primary PBX gateway (that connects to the
router) to the WAN port of the secondary PBX gateway. Likewise the LAN port of the secondary PBX
gateway connects to the HUB or Switch on the LAN.