The Alpha Communications® RY912 12-Line Interface Relay Board is designed to provide 'no phone line capability' when interfaced with the Alpha Communications® TE903NP, TE904NP or DPW100W (concierge/guard) master/phone stations, and PM900 control cabinet.
Provides 'No Phone Bill' (aka 'No Phone Line') capabilities for up to 12 remote telephones (each)