- Ring with adjustable volume and cadence
- Hearing aid compatible amplified handset with thumbwheel volume control
- Optional RC-4A for secure remote relay control, see DOD 582
- SIP compliant
- PoE powered (class 1, <4 Watts)
- Outbound Proxy, Authentication ID, Peer to Peer, VLAN Tagging
- Network downloadable firmware
- Cycles to up to three rollover phone numbers on busy or no-answer
- Remotely programmable
- Extended temperature range (-40F to 140F)
- Selectable auto-answer feature for monitoring
- Diagnostics (for testing remote RC-4A relay)
- K-1900D-IP available in red or ash
- Hearing aid compatible amplified handset with thumbwheel volume control
- Optional RC-4A for secure remote relay control, see DOD 582
- SIP compliant
- PoE powered (class 1, <4 Watts)
- Outbound Proxy, Authentication ID, Peer to Peer, VLAN Tagging
- Network downloadable firmware
- Cycles to up to three rollover phone numbers on busy or no-answer
- Remotely programmable
- Extended temperature range (-40F to 140F)
- Selectable auto-answer feature for monitoring
- Diagnostics (for testing remote RC-4A relay)
- K-1900D-IP available in red or ash