Yealink Seamless handover and roaming, Up to 100 parallel calls, Up to 30 base stations, Up to 100 handsets, Up to 100 SIP accounts, Support LDAP/Remote Phonebook, Support Xsi, Directory DECT radio coverage up to 50m indoors and 300m outdoors, DECT technology: Support Opus, Support PoE, Compatible with Yealink W56H/W53H.