1. Robust aluminum alloy die-cast body stainless steel face plate
2. Waterproof rating IP55 dust proof.
3. LED indicator for incoming call optional.
4. One button for emergency call, 3W loudspeaker with full metal keypad.
5. Lightening protection to ITU-T recommendation K.21.
6. POE power supply or DC12V powered.
7. Temperature range from -40 degree to +70 degree.
8. Standard Support Session Initiation Protocol (SIP), RFC 3261.
9. Calling indoor extension for two-way conversation.
10. Support echo cancellation.
11. Remote software upgrade, configuration and monitoring.
12. Optional 7 minute time out to release the line if the other side hang up.This function upon buyer's requirement).
13. Application: Vila, bank, hotel, school, parking lot, door gate, metro, railway, LRT, speedway, power plant, bridge etc.