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T21P Stuck on "Initializing" - Recovery Mode Fails`
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complex1 Offline
3CX Adv. Cert. Engineer

Posts: 1,198
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Post: #2
RE: T21P Stuck on "Initializing" - Recovery Mode Fails`
(08-21-2021 10:36 PM)YCMJamie Wrote:  A few T21P E2 handsets have decided to brick themselves after reboots. There was no firmware upgrade happening at the time.

(The provisioning file has no firmware URL listed in it, so I'm not sure why or how they got stuck on "Initializing" when they are rebooted.)

To restore the phones to working order, I asked my vendor for recovery files (.bin, .rfs and .rom) and I started a TFTP server.

When I put the handsets into recovery mode (by holding down the speaker button) and enter the correct IPs for the gateway and TFTP server, the TFTP server displays a "File too large" error when the handsets attempt to download the .rom file.

The .bin (which is larger than the .rom) and .rfs files download just fine though.

The phone displays show "Start Upgrading" and they just sit on that screen for hours.

Any ideas? Are these phones just duds?


Please give this one a try, but the use is at your own risk.
"https://www.go-ccs.nl/downloads/Yealink T21-E2.zip"

Kind regards,

I am not an employee of Yealink.
Dutch is my native language, not English. Apologies for my imperfect grammar.
Please do not send unsolicited PM messages. I will not answer them.
(This post was last modified: 08-22-2021 03:08 AM by complex1.)
08-22-2021 03:08 AM
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RE: T21P Stuck on "Initializing" - Recovery Mode Fails` - complex1 - 08-22-2021 03:08 AM

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