[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

Yealink Forums » IP Phone Series » T4x Series » T42S unable to update firmware

Thread Closed 
 
Thread Rating:
  • 0 Votes - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
T42S unable to update firmware
Author Message
complex1 Offline
3CX Adv. Cert. Engineer
*****

Posts: 1,526
Joined: Jan 2014
Reputation: 44
Post: #2
RE: T42S unable to update firmware
(08-24-2022 03:15 AM)brianstoiber Wrote:  I have multiple T42S SIP phones. They were on an old firmware version (66.83.0.30) and needed to upgrade them as I am moving our service to 3CX. I need to get to 66.86.0.5.

I have been able to upgrade the firmware to 66.84.0.35 but I can't get them any farther than that. Every time I try to upgrade them, I get an error saying

Update failed(-5)

or they will say

Firmware updating...
Do not power off!
Unable to complete.
Will try again now!

Any help on what I need to do?

Hi,

Please reset the phone to factory default and try again.
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.
08-24-2022 05:41 PM
Find all posts by this user    like0    dislike0
Thread Closed 


Messages In This Thread
RE: T42S unable to update firmware - complex1 - 08-24-2022 05:41 PM
RE: T42S unable to update firmware - oliv - 09-29-2022, 07:45 PM
RE: T42S unable to update firmware - oliv - 09-30-2022, 02:29 PM

Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  newest firmware for T4XS units causes bootup loop davedogmoore@gmail.com 0 868 01-21-2024 03:44 PM
Last Post: davedogmoore@gmail.com
  SIP-T46G Need firmware update instructions RobbyK 2 1,268 01-11-2024 10:52 PM
Last Post: RobbyK
Question SMS/Text Auto Reply on T42S tcodispot 0 524 01-09-2024 03:51 AM
Last Post: tcodispot
  Firmware T42s Raimundo 1 1,602 11-23-2023 06:45 PM
Last Post: Darsh
  T46U + EXP43 Stuck on Welcome Screen after update danantonielli 2 3,396 10-06-2023 10:04 PM
Last Post: roland@simplicloud.co.za
  T41S FIRMWARE 66.9.0.80 vers 66.86.0.5 DANJEAN 1 2,041 08-23-2023 01:00 AM
Last Post: complex1
  Model T42s and T42g, the speakerphone is enable on incoming calls Lissvazquez 6 3,016 07-28-2023 10:27 PM
Last Post: complex1
  T43U T42S Call Park BLF robm 0 1,095 05-19-2023 12:16 AM
Last Post: robm
  Yealink SIP-T40P Firmware UnitedTech_Support 1 2,193 05-05-2023 08:07 PM
Last Post: complex1
  T48U Custom Firmware Upgrade to Official Friendly 0 2,074 03-29-2023 01:20 AM
Last Post: Friendly

Forum Jump:


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

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