some of our board directors had Cisco OLD EoL IP Phones 7985 as desktop phones,
the surprise today 2 weeks after an upgrade implementation was that the old 7985, doesn't support IP Array in the DCHP option 150.
ip dhcp pool IP_Telephony
option 150 ip xx.xxx.x.xx xx.xxx.x.xx
the IP Phones show on the screen TFTP Quering xxx.xxx.xxx
our solution was move the phones to the data vlan and use only 1 IP in the option 150 for that scope.
cmterm_7985.4-1-7-0