Hi,
CUCM 7 is already end of sale.
CUCM 7.1.5 supports UCL.If we refer the ordering guide of CUCM 8.5, you can get UCL licenses [Basic/essential].
http://www.cisco.com/web/partners/downloads/partner/WWChannels/technology/ipc/downloads/UC_8_6_OG.pdf
What I think if u place the order , you should get the licenses and at the backened, it would be DLU.
You can also speak to Cisco SE for further clarity.
regds,
aman