[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 » Phone specific topic » T2xP Series » Yealink T28P Firmware Upgrade Fails

Post Reply 
 
Thread Rating:
  • 1 Votes - 5 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Yealink T28P Firmware Upgrade Fails
Author Message
rlsabin Offline
Moderator
*****

Posts: 61
Joined: Nov 2012
Reputation: 2
Post: #3
RE: Yealink T28P Firmware Upgrade Fails
The number 12 being displayed indicates that the existing firmware on the phone has software protection and can not be upgraded with the new firmware you are using. You need to find out who the existing firmware on the phone was produced for and contact them to see if they have a later version you could use to update your phones

Rick
01-14-2014 10:59 AM
Find all posts by this user    like0    dislike0 Quote this message in a reply
Post Reply 


Messages In This Thread
RE: Yealink T28P Firmware Upgrade Fails - rlsabin - 01-14-2014 10:59 AM

Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  T21P E2 firmware upgrade janp 0 1,155 01-27-2024 02:43 AM
Last Post: janp
  Call forwarding with SIP devices Yealink and Cisco Call Manager CUCM joao.schlemm 8 25,289 12-27-2023 06:49 PM
Last Post: nolto
  T28P - OpenVPN TLS error: Unsupported protocol 1sae 0 1,062 07-18-2023 06:50 AM
Last Post: 1sae
  Which Yealink USB headset complies with T2xG/T2xP series ? oliv 2 2,615 02-08-2023 09:30 PM
Last Post: oliv
  Dial-Now fails to recognize time-out braymond 2 10,461 01-31-2023 05:33 PM
Last Post: eddie79it
  Possible upgrade T26P Zdenda_Enter 3 4,692 07-12-2022 04:23 PM
Last Post: Zdenda_Enter
  Firmware upgrade fails on T21P E2 p.pasquino@technology4you.it 0 5,396 11-02-2021 04:42 PM
Last Post: p.pasquino@technology4you.it
  T21P Stuck on "Initializing" - Recovery Mode Fails` YCMJamie 5 13,616 08-24-2021 07:04 PM
Last Post: YCMJamie
  T21P_E2 firmware 84.0.125 slow with VLAN GwenH 3 12,322 11-03-2020 11:01 PM
Last Post: complex1
  how to connect yealink T23G to mikrotik openvpn server m.taghavi 4 13,962 10-11-2020 11:31 AM
Last Post: bozko

Forum Jump:


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

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