PLANET™ IPX-1800N ISDN IP PBX system is designed and optimized for the SMB and SOHO daily communications. The IPX-1800N is the next generation voice communication platform for small to medium enterprises. Designed as an open, scalable, and highly reliable telephony solution, the IPX-1800N is able to accept 30 extension registrations, and effectively scales from under 30 users to as many as 50-user enterprises. Designed to run on a variety of VoIP applications, the IPX-1800N provides centralized call control, auto-attendant, voice conferencing, ISDN access, digital and IP-based communications. The IPX-1800N integrates 4 ISDN telephony interfaces to become a feature-rich PBX system that supports seamless communications between existing local calls, IP phones and SIP-based endpoints.