- Viking Door Entry Control for 4 Entry Phones Provides CO Sharing Call Waiting and One Aux Contact- Allows an entry phone to share a single telephone line with a residential or business telephone system- House phones ring with C O line cadence or distinctive ring when the entry phone Call button is pressed- Compatible with these Viking entry phones - E-10 E-20A E-30 E-40 Handsfree Phones - K-1500-7 Stainless Steel Panel Phone - Or use with any analog touch tone phone- Provide entry phone activated chimes and whole house paging when used with Viking model SLP-1- Produces double Call Waiting tones- One set of normally open and normally closed contacts available for operating a doorbell camera lights etc - Add door strike capability with the Viking model RC-2A Remote Touch Tone Controller
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