Hi,
This is supported. This is the output from my lab UC520:
nicmatth-sip(config-ephone)#type ?
12SP 12SP+ and 30VIP phones
521G Cisco IP Phone CP-521G
524G Cisco IP Phone CP-524G
525G Cisco IP Phone CP-525G
7902 Cisco IP Phone 7902
7905 Cisco IP Phone 7905
7906 Cisco IP Phone 7906
7910 Cisco IP Phone 7910
7911 Cisco IP Phone 7911
7912 Cisco IP Phone 7912
7920 Cisco IP Phone 7920
7921 Cisco IP Phone 7921
7925 Cisco IP Phone 7925
7931 Cisco IP Phone 7931
7935 Cisco IP Conference Station 7935
7936 Cisco IP Phone 7936
7937 Cisco IP Conference Station 7937
7940 Cisco IP Phone 7940
7941 Cisco IP Phone 7941
7941GE Cisco IP Phone 7941GE
7942 Cisco IP Phone 7942
7945 Cisco IP Phone 7945
7960 Cisco IP Phone 7960
7961 Cisco IP Phone 7961
7961GE Cisco IP Phone 7961GE
7962 Cisco IP Phone 7962
7965 Cisco IP Phone 7965
7970 Cisco IP Phone 7970
7971 Cisco IP Phone 7971
7975 Cisco IP Phone 7975
7985 Cisco IP Phone 7985
CIPC Cisco IP Communicator
anl SCCP Gateway (AN)
ata ATA phone emulation for analog phone
bri SCCP Gateway (BR)
vgc-phone vg248 phone emulation for analog phone
You can see 'ata' as an option towards the bottom.
-nick