[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.

Post Reply 
Thread Rating:
  • 0 Votes - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Yealink T48S won't factory reset
Author Message
complex1 Offline
3CX Adv. Cert. Engineer

Posts: 1,308
Joined: Jan 2014
Reputation: 39
Post: #4
RE: Yealink T48S won't factory reset
(07-16-2022 06:47 AM)djcartledge Wrote:  
(07-15-2022 07:53 PM)complex1 Wrote:  
(07-15-2022 01:04 PM)djcartledge Wrote:  Hello
I have a T48S that a client wants to re-use with 3CX
However we have tried to reset to factory and it does its thing and resets from the LCD , but when it restarts, it re provisions and we can't login to remove the auto provisioning.
no one knows the Admin password.
The unit just will not co-operate.

All my other 48S units work fine on the reset.
Does anyone know how I can get around this issue


Please factory reset the phone without internet/network connection.
After reboot, try to log in with the default admin password?
Can you log in? Yes, then the phone's MAC-address is locked to an RPS somewhere. You have to contact the reseller and ask to remove the MAC-address from that RPS.
If the phone is provisioned from your 3CX then the admin password can be found there. (3CX Phone extension)

Thanks. However, I have tried that with no internet connection. The phone still will not allow logging after factory resetting. incorrect password. The moment the internet is plugged back in, it automatically re provisions.
Why does a factory reset not clear all settings including provisioning?


I guess the phone was not provisioned by 3CX, but by another provider/PBX.
If you can't log in with the default password after a factory reset, the phone is locked, so you can't do the reset.
For the time being, it is best to submit a ticket to the Yealink helpdesk.

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.
07-16-2022 05:16 PM
Find all posts by this user    like0    dislike0 Quote this message in a reply
Post Reply 

Messages In This Thread
RE: Yealink T48S won't factory reset - complex1 - 07-16-2022 05:16 PM

Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  T48S Very Slow Response nolto 1 444 08-11-2022 05:51 PM
Last Post: complex1
  Yealink T42G Phone stuck at Welcome LFC 12 21,593 08-08-2022 04:16 PM
Last Post: markvdheijden
  Ringer Loud on Yealink T46S when using WH62 Dual Headset KellyL@AlternateAccess.com 0 524 07-07-2022 05:06 AM
Last Post: KellyL@AlternateAccess.com
  Yealink T48s Firmware update failed dangmoss 2 3,116 02-19-2022 03:09 AM
Last Post: dangmoss
  Problem Change Firmware T48s from SFB to SIP Lars Maschke 2 3,124 01-14-2022 10:22 AM
Last Post: kumagera
  Yealink T42S and T42G Phone stuck at Welcome Pierre06 7 5,610 01-10-2022 11:36 PM
Last Post: Pierre06
  Factory reset T46s w/o admin password DanielP 7 11,604 12-02-2021 06:07 PM
Last Post: complex1
  NAP over Yealink T46 - not working Bernhard77 0 1,676 11-16-2021 09:15 PM
Last Post: Bernhard77
  SIP account on the Yealink T46U suddenly Not Registered kmsfn 0 1,646 10-26-2021 04:44 PM
Last Post: kmsfn
  Yealink, provisioning and Sophos firewall UCUC 4 4,536 10-07-2021 10:06 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