The C-1000B allows single line phones or phone systems to share a phone line with one or two Viking door boxes or paging amplifiers. The C-1000B provides two Touch Tone controlled relays to operate door strikes or gate openers and provides door box triggered CCTV camera switching.

Viking door boxes and paging amplifiers can be used on single line, residential or home office applications as well as on fully loaded systems, because they are no longer limited to installation on unused trunk ports.