atcomsystems.ca/forum Forums TDM Business Telephone Systems NEC Telephones & Systems NEC Electra Professional 2 programming question

HI! I have in my home office an NEC Electra Professional 2 system with many 16 and 8 button phones.
Currently, on some of the phones, when you pick up the phone they go to my 3rd telephone line to make an outgoing call, and some go right to the internal intercom. (From the intercom if you push "9" then it goes to line 3).
I want to program them to all go to Line 1 first (or the first available open line (be it 1 then 2 then 3) when you pick up the receiver. Does anyone know how to program this through the telephone?

Thanks - I appreciate your help! [email protected] - Bennett