Option 66 issues with firmware 36.72.0.25 and 26

[JamesK]

I am trying to use Option 66 with my yealink phones so they will grab the configuration files automatically. on firmware 36.72.0.1 this works great. This is whey you had to have both the common cfg file and the mac cfg file.

now when i received some new Yealink phones they came with 36.72.0.26 firmware. I thought i would give it a try.

I set the phone up. Plugged it into a POE switch. It booted up but after several minutes nothing happened.

I confirmed i had the option 66 programmed correctly. I logged into the phone's gui and found it has "Server URL ftp://{$ftp_server}" and "User name {$ftp_username}"

In the Release notes i found this:
"11. Unified the auto provisioning files (Common.cfg/MAC.cfg) among all types of
Yealink SIP phone.
Description: In the new version, the same feature configuration items were unified
among all phone types. For the individual not unified configuration items, the new
configuration files would have corresponding annotations, for more information,
please refer to the Yealink_SIP_Phones_Auto_Provisioning_Guide."

first off there is no new "Yealink_SIP_Phones_Auto_Provisioning_Guide". The two newest ones i can find are from December of 2013 and Jan of 2014. So a new one of those would be nice so we could figure out how to use the phones.

2nd I rolled the phone back to 36.72.0.1 and it works fine. I tried 36.72.0.25 as .26 is not available for download, and .25 would not provision either and the two fields have the same information i listed above for the 26.

Is there something the new firmware is looking for in the configuration file that it did not or some other sort of change we need to know about?

Can you get the update "Yealink_SIP_Phones_Auto_Provisioning_Guide" out there for us?

Can you get .26 firmware out there?

What is the difference between .26 and .25?