16 lines with up to 16 SIP accounts
Built-in mega-pixel camera for video calling with privacy shutter
Runs on Android 7.0 operating system
Built-in Bluetooth for syncing with mobile devices and connecting
The Grandstream GHP621 is a compact IP phone designed for hotel rooms and similar environments, featuring 2 SIP lines, PoE support, speed dial keys, a customizable faceplate, and easy remote management via GDMS.
Grandstream CloudUCM Startup is a cloud-based PBX system designed for freelancers and small teams. It supports up to 10 extensions and 4 calls, includes built-in conferencing, live chat, and CRM integration, and comes with a 30-day free trial—no hosting fees required.
Mikrotik hEX Lite RB750r2 Routerboard 5-port 10/100 switch/router 
Wireless Vibration Window Sensor(DES-A30) 
