I have a customer that wants to have the UC540 emulate their existing Norstar KEY system. They have 6 lines & 15 stations. I have already setup and tested a hybrid key lab with FXO's as shared lines https://supportforums.cisco.com/docs/DOC-15755 . This works fine. The only problem is, I can not select several phones to ring and several phones not to ring when a FXO call comes in. Either all the phones have to ring or all the phones are silent ring, not a mix of both. Is there any way around this? Perhaps in CLI.