3-contact 2.5mm male - 4-contact 3.5 mm female

I got an Iphone headset which has four contacs on a phone plug.
But the phone uses a normal 3-contact universal handsfree.

I have bought numerous adaptors but they don't seem to work.
I can hear the phone, but I can't be heard.

I am now tempted to make the adaptors myself. How do you spec them?
Would places like Mouser have them or are they still too new?

- = -
Vasos Panagiotopoulos, Columbia'81+, Reagan, Mozart, Pindus, BioStrategist
http://www.panix.com/~vjp2/vasos.htm
---{Nothing herein constitutes advice. Everything fully disclaimed.}---
[Homeland Security means private firearms not lazy obstructive guards]
[Urb sprawl confounds terror] [Phooey on GUI: Windows for subprime Bimbos]

 

[Jeff Liebermann]

On Mon, 13 Jan 2014 02:05:38 +0000 (UTC),
vjp2.at@at.BioStrategist.dot.dot.com wrote:

I got an Iphone headset which has four contacs on a phone plug.
But the phone uses a normal 3-contact universal handsfree.

Slightly wrong. A 3 contact 3.5mm plug can be used for earphones
only, but if you want a microphone, you'll need the 4th connection
(nearest the plug).

I have bought numerous adaptors but they don't seem to work.
I can hear the phone, but I can't be heard.

I am now tempted to make the adaptors myself. How do you spec them?
Would places like Mouser have them or are they still too new?

This should help:
<http://www.ediy.co.nz/use-ipod-touch-iphone-with-skype-xidc55676.html>
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

 

[Leif Neland]

vjp2.at@at.BioStrategist.dot.dot.com har bragt dette til os:

I got an Iphone headset which has four contacs on a phone plug.
But the phone uses a normal 3-contact universal handsfree.

I have bought numerous adaptors but they don't seem to work.
I can hear the phone, but I can't be heard.

How about buying a headset that fits instead of spending money on
numerous adaptors?

--
Husk křrelys bagpĺ, hvis din bilfabrikant har taget den idiotiske
beslutning at undlade det.

 

[dave]

On 01/12/2014 06:05 PM, vjp2.at@at.BioStrategist.dot.dot.com wrote:

I got an Iphone headset which has four contacs on a phone plug.
But the phone uses a normal 3-contact universal handsfree.

I have bought numerous adaptors but they don't seem to work.
I can hear the phone, but I can't be heard.

I am now tempted to make the adaptors myself. How do you spec them?
Would places like Mouser have them or are they still too new?

- = -
Vasos Panagiotopoulos, Columbia'81+, Reagan, Mozart, Pindus, BioStrategist
http://www.panix.com/~vjp2/vasos.htm
---{Nothing herein constitutes advice. Everything fully disclaimed.}---
[Homeland Security means private firearms not lazy obstructive guards]
[Urb sprawl confounds terror] [Phooey on GUI: Windows for subprime Bimbos]

I have a Yaesu adaptor for handheld transceivers that has the 4 chan
male 3.5mm to a stereo 3.5mm Female and a mono 3.5mm

 

[Adrian C]

On 13/01/2014 02:05, vjp2.at@at.BioStrategist.dot.dot.com wrote:

I got an Iphone headset which has four contacs on a phone plug.
But the phone uses a normal 3-contact universal handsfree.

I have bought numerous adaptors but they don't seem to work.
I can hear the phone, but I can't be heard.

I am now tempted to make the adaptors myself. How do you spec them?
Would places like Mouser have them or are they still too new?

What color is your phone? How heavy is it? Does the IMEI end with a C or
a Z?

--
Adrian C

 

[William Sommerwerck]

Have you considered getting a new phone? I was trying to make a four-pin
handset work on a three-pin cell phone around the time I decided to switch to
another provider. The phone that came with the change had a four-pin jack, and
everything worked fine.

 

[David Harmon]

On Sun, 12 Jan 2014 18:34:29 -0800 in sci.electronics.repair, Jeff
Liebermann <jeffl@cruzio.com> wrote,

On Mon, 13 Jan 2014 02:05:38 +0000 (UTC),
vjp2.at@at.BioStrategist.dot.dot.com wrote:

I got an Iphone headset which has four contacs on a phone plug.
But the phone uses a normal 3-contact universal handsfree.

Slightly wrong. A 3 contact 3.5mm plug can be used for earphones
only, but if you want a microphone, you'll need the 4th connection
(nearest the plug).

But the OP is talking about a 3 contact 2.5mm plug (see subject
line) for a mono headset with a microphone, total three wires.

I have bought numerous adaptors but they don't seem to work.
I can hear the phone, but I can't be heard.

The four conductor 3.5mm plugs are wired two different ways.
Using the wrong one often produces those symptoms.

If you split a 3-contact plug to add a 4th contact for a mic, there
are two ways to do it. The obvious way is to keep the ground on the
sleeve contact where it's always been and use the second ring
contact for the mic. That's the way phone manufactures did it, and
standardized under the OMTP Open Mobile Telecom Platform.
http://en.wikipedia.org/wiki/Open_Mobile_Terminal_Platform

Then some jerkwads produced something called the iPhone and just had
to be different. They put the ground on the second ring and the mic
on the sleeve and called it their own standard under the CTIA
Cellular Telecommunications Internet Assholes.
http://en.wikipedia.org/wiki/CTIA_-_The_Wireless_Association

Regrettably, most manufacturers decided to switch rather than fight,
so most new phones follow the CTIA wiring. A simple adapter
crossing ring2 with sleeve is all it takes to convert either one to
the other.
http://handtokey.blogspot.com/2013/11/converting-omtp-headphone-to-standard.html
http://www.amazon.com/Sony-EC250-Headphones-Adaptor-1249-0456/dp/B009HW15UG
https://encrypted.google.com/search?q=omtp+ctia

 

*+-Then some jerkwads produced something called the iPhone and just had
*+-to be different. They put the ground on the second ring and the mic

Exactly. Well put!


*+-http://handtokey.blogspot.com/2013/11/converting-omtp-headphone-to-standard.html
*+-http://www.amazon.com/Sony-EC250-Headphones-Adaptor-1249-0456/dp/B009HW15UG
*+-https://encrypted.google.com/search?q=omtp+ctia


AHa! Many thanks!

THe headset is a "retro handset" (I got several at a discount and they only
work on iPhones). My landline phones all have 3/2.5 jacks as well. I thought
universal meant universal (dag nab it)!

THanks again.

- = -
Vasos Panagiotopoulos, Columbia'81+, Reagan, Mozart, Pindus, BioStrategist
http://www.panix.com/~vjp2/vasos.htm
---{Nothing herein constitutes advice. Everything fully disclaimed.}---
[Homeland Security means private firearms not lazy obstructive guards]
[Urb sprawl confounds terror] [Phooey on GUI: Windows for subprime Bimbos]