RJ8 to 2.5mm Adapter

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	Question by Steve Purcell posted 15 Feb 2006
	RJ8 to 2.5mm Adapter
I have a phone with a 2.5mm headset jack. I bought a blueparrott wireless headset. The cable that came with the headset has an RJ8 (handset size) connector. Is there an adapter that has a female RJ8 socket and a 2.5mm plug so I can connect the headset to the phone. If not, can you tell me how to wire it if I try to make one from parts from the local radio shack?
	Answer by Joseph Golan posted 15 Feb 2006
Dear Steve, On the RJ8 Headset/Handset connector the center two pins are for the Microphone (Transmitter) and the outer two pins are for the speaker (receiver). On a 2.5mm jack, it is typically wired as follows: TIP:Headphone speaker signal (typically around 32 ohm element) RING: Microphone signal (typically electret capsule) SHIELD: Ground for both speaker and microphone signals It is unknown though if the signal levels will be a proper match between these two pieces of equipment. Sincerely, Joseph Golan, RCDD
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