Cheapest that works
802.3af PoE injector
IEEE 802.3af PoE, Class 3, into the network port. Active injector, not passive.
The T54W takes standard 802.3af PoE, so no Yealink adapter is needed.
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Power Supply for Yealink T54W: 5V 2A, Not 5V 0.6A
Yealink 5V 2A wall adapter, or PoE from the network port
Verified November 2026
Which one do you have?
You need: No adapter needed; datasheet gives 2.2-5.5W over PoE
You need: Check the label: Yealink also sells 5V 0.6A and 1.2A units, and the T54W list is under the 2A part
- Device end
- DC plug; size not confirmed
- Wall end
- US or UK wall plug built in, per part
- Voltage
- 5V DC
- Current
- 2A
Polarity not confirmed. Read the label on your item.
The usual mistake
Reusing the 5V 0.6A adapter from a smaller Yealink phone: same voltage, not the 2A this phone's listed for.