T23P provisioning with different firmware versions

[jolouis]

A few things:
1) Try turning up the syslog to level 6 as requested, and then reboot the phone and view the log after the reboot. You should see a bunch of AUTOP related entries in the log mixed in with everything else that should hint at what's going on.

2) You are using "static." provisioning values, but I'm pretty sure those were only added in V81 firmware. In V80 firmware they didn't exist, so defining them will do nothing, hence you don't see them taking effect. Remove the leading "static." from those lines, and see if that changes things.

3) I have to dig into this further but did notice on testing a V81 device the other day that it seemed to be failing to provision. In V81 Yealink introduced the concept of boot files. So instead of phones automatically requesting y00000000000xx.cfg as they used to, they now request y00000000000xx.boot. That boot file then has to specify the appropriate CFG files to use (ie. the y00000000000xx.cfg and MAC.cfg files). The documentation says " If boot file is not found on the provisioning server, IP phones download the common CFG file first, and then the MAC-Oriented CFG file during auto provisioning – i.e., the old mechanism for auto provisioning"

But I did not see this happen at all so I suspect there's an issue. Will do some more digging on this to be sure but you are not alone in the V81 struggles.