How install Door Intercom circuit board with HAI circuit board?

pac1234

Member
Adding a door intercom (Channel Vision TE-111), where when someone rings the front door bell all the house phones ring with a distinctive ring. 
Have a HAI OmniPro II and not sure which of the following below is the correct spot to splice it in?
Do I place the TE-111 before, after, or in parallel with the HAI circuit board?
What I have now:  Line in from street ---- to HAI ---- to house phones
Option 1: Line in from street ---- TE-111 (line) / TE-111(Tel) -----  to  HAI -----  to house phones
Option 2: Line in from street ---- to  HAI -----  TE-111 (line) / TE-111(Tel) -----  to house phones
Option 3: Line in from street ---- splice into two (2 Line in wires):  with one to the HAI, and one to the TE-111 (line) ----- take the line coming out of the HAI, and the one out of the TE-111(phone) and splice them back into one wire  -----  to house phones
Thanks!
 
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