The Yealink W90DM DECT IP Multi-Cell DECT Manager is designed to provide organisations who require wireless coverage with full ease of deployment. This device creates an extremely scalable and reliable solution for organisations of any size and any shape. The system supports up to 250 handsets and 250 simultaneous calls, which ensures one call in each handset, and allows you to get rid of the limited wireless signal coverage of only one base station. Meanwhile, the system can work with Yealink W53H, W56H, W59R, CP930W, and DD Phones (sold separately) with seamless roaming and handover of the calls, making freely mobile communication in and between each zone achievable. The W90DM has a modern, compact design with Yealink HD voice quality, combined with the full-duplex technology Opus, giving you an elaborate audio experience.Supports Air and LAN synchronisationSeamless handover and roamingUp to 60 base stationsUp to 250 handsetsUp to 250 SIP accountsUp to 250 parallel callsSupports XML/LDAP/Remote PhonebookSupports XSI Directory/XSI Call LogExternal antenna, DECT radio coverage up to 50m indoors and 300m outdoorsDECT technology: Yealink DECT technology is based on CATiq2.0, which focuses on high-quality Audio VoIP (wideband), and low-bitrate data applications. Not compatible with any third-party DECT devices (base station, handset, etc.)Supports SRTP / SIPS / TLS, LDAP(s) and HTTPSSupports OpusSupports PoE