DECT IP Multi-Cell DECT Manager, DECT technology, Air sync and LAN sync, Up to 60 base stations, Up to 250 handsets, Up to 250 SIP accounts, Up to 250 parallel calls, Support LDAP/Remote Phonebook/XML Phonebook/XSI Directory, Compatible with Yealink W56H/W53H/W59R/CP930W/T41S+DD10K