Features:
- Phone line powered
- No dial pads
- Designed to mount in a standard emergency phone enclosure (10" x 7" x 3")
- Built for easy installation and simple operation
- Intelligent call progress detection for automatic hang-up on CPC, silence, busy signal or timeout
- Alternate action "call" button to place or cancel a call
- Selectable auto-answer feature allows remote monitoring
- Two-way handsfree communication
- Vandal resistant metal push button
- Programmable maximum call length
- Programmable VOX (mic/speaker) switching speed
- Adjustable mic and speaker volume
- Use on an analog ringdown circuit that provides CPC, busy, Return to dial tone or silence when called phone hangs up
Applications:
- Commercial, industrial or residential elevators
- Use in conjunction with a Viking K-1900-5 Dialer or a K-1900-30 Multi-Number Dialer on CO lines or analog PABX/KSU stations
- Use on a programmed ringdown circuit of an analog PABX/KSU station
The K-1500-EHFA Emergency Phone provides reliable handsfree emergency communication. The phone can be connected directly to a CO line or analog PABX/KSU station when used in conjunction with a Hot-Line dialer or programmed ring down circuit. The phone can also be used with Viking's DLE-200B ring down circuit.
When the button is pressed, the K-1500-EHFA will come off hook until its intelligent call progress detection automatically hangs it up. During this time, the user may converse handsfree.
The K-1500-EHFA components conform to industry-set standards and are mounted on a formed aluminum panel, finished in red powder paint for easy visibility.
For more information, please see 
User Manual
