SL2100 Digital/Analog Station CardProduct condition: New Provides interface for (8) digital stations and (2) analog stations Also provides interface for: Music on Hold or Background Music source External paging Zone Equipped with (4) 8 conductor interface jacks. (2) for (8) digital stations (1) for (2) analog stations (or Doorboxes) (1) for Music on Hold Background Music input, and External Paging Zone output, and (2) relay circuit connections. The above relay circuits are available