Is there a way to block specific inbound numbers via the UC520. I have a customer who wants to block all 800, 866, unknow and private numbers coming into the UC520?
Use Translation rules that will work just like in regular CME, give it a try.
voice translation-rule 1
rule 1 reject /#/
rule 2 reject /#/
*where # is the number that you wish to block.
voice translation-profile BLOCK_NUMBER
translate incoming 1
Assign this translation profile to the incoming dial-peer that you are using.