VK-LS-911 - Viking Electronics Analog Emergency Line Sharing Device

Analog Emergency Line Sharing Device for IP PBXs/VoIP Phone Systems
Shares FXO port with another analog device and seizes the line in the event of a 911 call
Maintains the availability of the line in the event the emergency call is disconnected, so 911 personnel can call back to reestablish the connection
Routes both incoming and outgoing calls
Gives priority to emergency devices
Incoming calls routed to one of two ports by distinctive ring or quick callback
Status LED displays mode of operation
Provides a busy signal to the phone port when an emergency device is in use