I have a Viking 2000A door phone with a c 1000b controller set in N/O position connected to trunk port 704 with a couple of digital sets that have a DT 704 key. When door phone is pressed it will ring 3 times at door phone before ringing once at stations in the group. How do I set this to ring...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.