On Premise IP PBX (Audio Only) with No FXO ports, No FXS ports and supporting up to 250 users
UCM6300A

The UCM6300 Audio series enables enterprises to create strong and scalable unified communication and collaboration solutions.
This IP PBX Audio series provides a platform that integrates basic business communications needs such as voice, instant messaging (IM), voice meetings, audio web meetings, data, analytics, mobility, facility access, intercoms, and more.
Features
•  Supports up to 250 users and up to 50 concurrent calls
•  Zero configuration provisioning of Grandstream SIP endpoints
•  Built-in Instant Messaging, Audio Conferencing & Web Meetings platform supporting access from computers, mobile devices, and SIP endpoints
•  Wave for Android, iOS, Chrome and Firefox browsers allows communication with all UCM6300 users & solutions
•  API available for third-party integrations, including CRM and PMS platforms
•  Advanced security protection with secure boot, unique certificate and random default password to protect calls and accounts
•  Three Gigabit auto-sensing RJ45 network ports with integrated PoE+ and support NAT router
•  Automated NAT firewall traversal service facilitates secure remote connections
•  Supports Full-Band Opus voice codec and H.264/H.263/ H.263+/H.265/VP8 video codec, jitter resilience up to 50% packet loss
•  Compatible with GDMS for cloud setup, management and monitoring
•  Based on Asterisk* version 16 open source telephony operating system