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T21P E2 and power adapters
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Aishion_Yealink Offline

Posts: 110
Joined: Mar 2017
Reputation: 1
Post: #4
RE: T21P E2 and power adapters
(03-02-2018 11:28 AM)Mauro Wrote:  Excuse me, I'm not an expert about the topic, but isn't it the voltage that has to be EXACTLY the same (both have 5V), while Ampere have to be the same OR ABOVE?
Aren't more Ampere in a PSU a good thing, usually? I thought a PSU could supply any Ampere (at a specific voltage) up to its maximum amount, which is the one written on it.

It's logic that you cannot use a T21P E2 PSU in a T20P due to the T20P probably requiring MORE than 600mA... but I guess the opposite should work (IF the connection "jack" is the same, of course... IS IT?), as T21P E2 consumption has to be less than 1.2A.

Just like the PSU of a PC... the fact that it supports up to 500W does not mean that you machine MUST consume 500W all the time! Isn't it?
Or like if you have a top-level cell phone PSU which has got 2A, you can still use it also to recharge an entry-level cell phone which original PSU was only 1A... isn't it?

Dear customer,

Thanks for your prompt reply.

For your question, yes you can successfully power on the T21P E2 using T20P PSU.

But we can't tell that the PSU can work with T21P E2 since it may caused some potential problem such as decrease device lifetime.

Hope you understand and have a nice day!

Any question, please feel free to contact us.

Best Regards

03-07-2018 09:25 AM
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Messages In This Thread
T21P E2 and power adapters - Mauro - 02-27-2018, 02:40 PM
RE: T21P E2 and power adapters - Mauro - 03-02-2018, 11:28 AM
RE: T21P E2 and power adapters - Aishion_Yealink - 03-07-2018 09:25 AM

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