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AT-2716POE Fast Ethernet Fiber & PoE Adapter Installation and User’s Guide
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Figure 32. VLAN topology
In Figure 32, the VoIP phone is attached to the AT-2716POE copper port.
However, many VoIP devices cannot recognize VLAN tagged packets.
The AT-2716POE Configuration Utility handles this situation by allowing
you to enable the VLAN setting on the copper port and assign a unique
VLAN ID to the port for the VoIP traffic. Once this is done, the AT-
2716POE adapter will insert the correct VLAN tag on each VoIP Ethernet
packet before traffic flows onto the fiber cable.
The adapter is configured so that traffic from both VLANs flows through
the fiber port to the fiber backbone of the local area network. The data
traffic and VoIP traffic are segmented or isolated from each other with this
configuration even though all of the packets travel on the same fiber cable
connected to the AT-2716POE fiber port.
Example 1 shows a scenario where non VLAN aware VoIP phone is
present. VoIP data is transmitted untagged on VLAN 2 and network data
is tagged with VLAN1 and is segmented from VoIP data.