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New Yealink T27G defaults
#636720 05/07/20 06:20 PM
Joined: Jun 2006
Posts: 32
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Joined: Jun 2006
Posts: 32
Has anybody ran into this issue on New Yealink T27G I program the phone it works great at my office! I take it to a job location and it asks for the last 5 digits of serial number and the phone resets back to factory.

Yealink Telephones
Re: New Yealink T27G defaults
ThePhoneConnection #636721 05/07/20 07:48 PM
Joined: Dec 2007
Posts: 6,402
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Joined: Dec 2007
Posts: 6,402
Quick question.

You program the set on your company network and them plug the set into an completely different network with a completely different IP address and subnet mask...different DHCP server and all that. I believe the network configuration setting would be incorrect.

I could be my wife is more than willing to attest to.


Please don't confuse your "Internet Search" with my licenses, certifications and over 30 years experience.

"Thank you for calling Technical Support. If you feel you have reached this number in error, please hang up and press redial."
Re: New Yealink T27G defaults
ThePhoneConnection #636757 05/12/20 12:53 PM
Joined: Mar 2018
Posts: 291
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Joined: Mar 2018
Posts: 291
You might try stetting it up at your office, powering it down for a little while, and then powering back up at the office and see what happens. If it defaults then there is some kind of problem with the phone losing information after it loses power. If it stays the same then it might be that it is trying to pull information from the local phone server, or LLDP server.

The Cloud is just someone else's computer!

Moderated by  Professor Shadow 

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