Hello.
Yes, the x7960 works with the UC520.
For transparency, here's the output of the load command on a UC520 running current sw.
Hope this helps.
Adam
UC520(config-telephony)#load ?
12SP 12SP+ and 30VIP phones
301 Cisco IP Phone SPA301
303 Cisco IP Phone SPA303
501G Cisco IP Phone SPA501G
502G Cisco IP Phone SPA502G
504G Cisco IP Phone SPA504G
508G Cisco IP Phone SPA508G
509G Cisco IP Phone SPA509G
521G-524G Cisco IP Phone CP-521G/524G
525G Cisco IP Phone SPA525G
525G2 Cisco IP Phone SPA525G2
6901 Cisco IP Phone 6901
6911 Cisco IP Phone 6911
6921 Cisco IP Phone 6921
6941 Cisco IP Phone 6941
6961 Cisco IP Phone 6961
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
7914 Cisco IP Phone 7914 14-Button Line Expansion Module
7915-12 Cisco IP Phone 7915 12-Button Line Expansion Module
7915-24 Cisco IP Phone 7915 24-Button Line Expansion Module
7916-12 Cisco IP Phone 7916 12-Button Line Expansion Module
7916-24 Cisco IP Phone 7916 24-Button Line Expansion Module
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
7941 Cisco IP Phone 7941
7941GE Cisco IP Phone 7941GE
7942 Cisco IP Phone 7942
7945 Cisco IP Phone 7945
7960-7940 Cisco IP Phone 7940/7960
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
ata ATA phone emulation for analog phone
