Chapter 3: Initial setup and connectivity
Power supply connectivity
You can connect the Avaya H239 and H249 phones to one or both of the following power supplies:
• External power adapter.
• 802.3af Class 2 Power over Ethernet (PoE) switch.
With a PoE switch, you can power the phone through a single Ethernet cable, which is also used
for data transmission. If you attach an Uninterruptible Power Supply (UPS) to the PoE switch, the
phone can continue working during a power outage.
If you do not have the equipment for a PoE connection, you can use the external power adapter
that is supplied with the phone.
If the phone is connected to both the power adapter and a PoE switch, then the power adapter
connection takes priority. The connection will switch to PoE if a power failure occurs.
Device connections
You must connect the power adapter, network, PC, and handset to the corresponding ports as
described in the image below:
October 2019
Installing and Administering the Avaya H239 and H249 Phones
11
