Audio systems and intercoms Non-exhaustive list and subject to change. Last update: May 2022. 2N® IP Bêta Version 2.28 – Video Onvif, SIP audio Vocalys SE Released Alarm transmitter Astium Released Own. Addvals A8004 / A8015-E / A8207 Released SIP protocol Vocia Released Own. SSI MENA NCO PRAESIDEO Released Own. Concept Tech Xellip Released SNMP protocol or CASTEL protocol GE700 Released ICX protocol Lisnet Released Lisnet protocol Alert Bêta Call transfer application Alphacom Released OPC server ♦ New integration