Does AdvanceIP SWv4.20Y and TVSe SWv44.57 enable full integration of Polycom Soundpoint IP 560 SIP stations? If so, is there specific firmware and BootRom levels required for the Polycoms to work? This situation is for remote users to integrate into the phone system as if they were onsite. We are not interested in using the Avanti 3015IP stations as we already have the Polycom stations. Thanks in advance.