[YMCS/YDMP Free Trial Program]Yealink would like to offer Free Trial Program of Yealink device management service for our current eligible customers. You can see the details below.
https://www.yealink.com/ydmp-freetrial-2020


Post Reply 
 
Thread Rating:
  • 0 Votes - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
T42S factory reset without default password
Author Message
complex1 Offline
3CX Adv. Cert. Engineer
*****

Posts: 1,549
Joined: Jan 2014
Reputation: 48
Post: #2
RE: T42S factory reset without default password
(09-27-2020 05:41 AM)JeffWilkinson Wrote:  I recently picked up several 2nd hand Yealink T42S handsets from auction.
These have been customised and the default password is not "admin".
I need to factory reset or change the password back to "admin", so I can login and reprovision them.

The firmware currently installed shows version: 66.81.193.110

So far I have tried the normal factory reset method of holding the "Ok" button down waiting for the prompt and then selecting Yes. This prompts for a password which is not "admin" (keeps saying wrong password).
I have also tried the another method I came across when searching for a answer - which is to hold the "speaker" button down and power cycle the handset. I get to the 1.TFTP or 2.USB display on the screen. I stop pressing the speaker button and press 1 for TFTP... It then displays some IP address settings (192.168.0.100,255.255.255.0,192.168.0.1 and a TFTP address of 192.168.0.23) . The instruction i had found suggested I press OK button and then power reset the phone and it would perform a factory reset.
Unfortunately it just boots back up with the same settings.
Can anyone help me ? I would hate to have to throw all these handsets out.

Hi Jeff,

Because the user is prohibited to factory reset the phone I suggest to use the Recovery method using an TFTP server.
The necessary recovery files can be downloaded here:
https://www.go-ccs.nl/downloads/Recovery_T42S.zip

As I never had to use this procedure I can’t help you with it if you have questions or run in to issues. So use it on your own risk.

Kind regards,
Frank.

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.
09-27-2020 08:49 AM
Find all posts by this user    like0    dislike0 Quote this message in a reply
Post Reply 


Messages In This Thread
RE: T42S factory reset without default password - complex1 - 09-27-2020 08:49 AM

Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  Hotdesking how to make key after username (password) use numbers by default fergusinc 1 1,885 02-10-2024 06:38 PM
Last Post: complex1
Question SMS/Text Auto Reply on T42S tcodispot 0 1,347 01-09-2024 03:51 AM
Last Post: tcodispot
  Firmware T42s Raimundo 1 3,283 11-23-2023 06:45 PM
Last Post: Darsh
  Key pad speed dial FAILS from non-default account jseeley 1 2,310 09-08-2023 05:56 AM
Last Post: jseeley
  T46S Factory Default HornetSoft 0 2,208 08-17-2023 06:47 PM
Last Post: HornetSoft
  Model T42s and T42g, the speakerphone is enable on incoming calls Lissvazquez 6 5,926 07-28-2023 10:27 PM
Last Post: complex1
  T43U T42S Call Park BLF robm 0 1,759 05-19-2023 12:16 AM
Last Post: robm
  T42s VPN & local SIP Accounts noch work, only one of them mysterox 0 2,155 10-27-2022 04:54 PM
Last Post: mysterox
  T42S unable to update firmware brianstoiber 6 12,586 09-30-2022 05:31 PM
Last Post: complex1
  Yealink T48S won't factory reset djcartledge 3 7,814 07-16-2022 05:16 PM
Last Post: complex1

Forum Jump:


User(s) browsing this thread: 1 Guest(s)

Contact Us   Yealink   Return to Top   Return to Content   Lite (Archive) Mode   RSS Syndication