1. TCP Internet protocol / Voice over Internet Protocol -SIP
2. 1 WAN / LAN port for Bridge mode 3. Page bar on the handset for broadcast directly
4. Direct dialing and dual way intercommunication
5. Settable for single / group / multi-groups / all groups broadcast
6. Multiple channels for intercommunication and each channel up to five people
7. Confidential intercommunication function
8. Priority broadcast setup for ten levels
9. LED indicator light shows power status / Off Hook / phone call coming
10. Able to remotely update the telephone settings 11. Explosionproof type were IECEx/ATEX zone 1