DHI-ARC3800H-FW2-Wireless Alarm Hub2

Supports connecting up to 8 IPCs in the same LAN
Supports in-hub pre-recording, so the camera doesn’t need a SD card
Supports two-way voice intercom with intercom siren
Supports accessing Internet via Ethernet, Wi-Fi, and 4G
Supports voice call alarm and SMS alarm,
Supports connecting up to 150 wireless peripherals

https://www.dahuasecurity.com/products/Alarms/Wireless-Alarm/Controllers/ARC3800H-FW2