Hello,
my client has made change to its network to reinforce security. I don't know exactly what changes, though. The network gurus are a bit under water with other tasks so I want to have an idea before bothering them.
53XX and 69XX phones work fine. However on some sites (big extended LAN network over the planet) the 52XX phones don't boot, they stay stuck at the TFTP step then reboot. I have not upgraded my 3300 in more than a year so there is no new software to load for the phones, they should just be doing their version check and boot.
Basically on some sites (each with own network parameters, but should be the same everywhere, evidently it's not the case) no 52XX phone is working (but 53XX OK), on other sites all 52XX phones are working.
What's the difference between 52XX and 53XX phones that could explain this ? According to the documentation there is no network protocol or port difference.
Thanks for your ideas
Regards
