Guardian’s HDE SERIES Analog telephones are intended for use in public areas where direct assistance or hands-free communication is required. They provide a two-way link to assistance through analog, half-duplex telephone transmission.

Guardian’s HDE-V SERIES VoIP telephones are intended for use in public areas where direct assistance or hands-free communication is required. HDE-V VoIP telephones are capable of remote monitoring, reporting the status of each unit and informing personnel of a malfunction.