Email support@riverworx.co.uk for latest prices Support Air and LAN synchronisation Seamless handover and roaming Up to 60 base stations Up to 250 handsets Up to 250 SIP accounts Up to 250 parallel calls Support XML/LDAP/Remote Phonebook Support XSI Directory/XSI Call Log External antenna, DECT radio coverage up to 50m indoors and 300m outdoors DECT technology: Yealink DECT technology is based on CATiq2.0, which focuses on high-quality Audio VoIP (wideband), and low-bitrate data applications. But we are not compatible with any third-party DECT devices (base station, handset, etc.). Support Opus Support SRTP / SIPS / TLS, LDAP(s) and HTTPS Support PoE Compatible with Yealink W59R/W56H/W53H, CP930W and DD Phone