The HAI C3 (Cellular Communications Center) is a wireless cellular communicator that allows phone calls to be made over the GSM cellular network using the existing telephones in your home. The HAI C3 can be used when there is no land line in your home or if the land line is temporarily unavailable.
The HAI C3 is perfect for homeowners without land lines, vacation homes, and locations that need remote monitoring. It provides better sound quality than regular cell phones because the attached antenna is better and more powerful than the one on a cell phone.
Regular telephones connected to the HAI C3 can be used to make calls. If a land line is present, you will hear the normal dial tone and you can make your call as normal using the land line service. However, if the land line is currently unavailable, you will hear a different tone which indicates the HAI C3 is in cellular mode and the call will be made using the cellular network.
The HAI C3 will work with regular home telephones, speakerphones, and answering machines.
The HAI C3 ships with an included backup battery in case the power goes out.