What your looking for is a CO hookswitch but on a analog telephone you can not disable the system hook flash. You are probbly going to find that you hit your flash button and dial a code to do a co hookflash on line one then press flash again to reconnect to line 1. I dont know the code and knowing IVX it dosent exist. Good luck maby this will send you in the right direction.


eOn/Vodavi/NEC/IVX/Cortelco/ITT/
Comdial/Adtran/Emrald Ice/Sprint:(

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