Headset Installation FAQ

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Can You Pair a Plantronics CS540 With a Computer Over Bluetooth?

The CS540 uses DECT, not Bluetooth, so it won't show up on your laptop. Here is how the APU-76 cable connects the base to a computer instead.

Jorge Gomez Oct 05, 2026· 4 min read

Most CS540 problems are fixed with the switch and dials under the base. What to set for no dial tone, echo, static, n...

Pair a CS540 headset to its C054 base by docking it or with the subscription button, and what to check when the light...

Plugged a headset into your ESI phone and got silence? It's not broken — ESI phones need a headset key programmed bef...

Your Mitel phone has no headset key active until you assign one. Here are the feature codes that do it, and when the ...

Setup, the switches under the base, the headset controls and the lights, taken from Plantronics' own CS540 user guide...

An NEC desk phone ships with no headset key defined, so a working headset stays silent. Here is how to program one on...