Ring Intercom connection to Tegui T72 (374260 / 364260) partialy ok

Hi, i have bought Ring Intercom (2024 version with one cable) and tried to connect it to my Tegui T72 (374260), in Ring app there is no 374260, only 374220, so i choose this one... It is digital intercom with 2 BUS connections (pin 1 and pin 2), this intercom has also pin 3,4 and A1. I tried to connect it as app says to do it (with C2,C3, C9 and C10), but if i connect it that way i get to much interference and buzzing, can't hear anything and door opens automatically without need to press anything...so something is wrong... ... this is because app says i need to connect C2 and C9 together under pin 1 (BUS) , C10 goes to pin2 (BUS) and C3 goes to pin 3.... but i found connection description of Tegui T72 and pin 3 is "EAL-1 DIG" So i tried to install it only with pin1BUS (C9) and pin2BUS (C10)... I do get notification, i can accept call, but i don't hear anything, i can buzz door open, but unlock time is only 1 sec...it is to short, (this intercom system expect me to keep button pressed until person opens the door)... So this way i can't hear anything and unlock time is to short... Is there anything else i can try ? Can i connect some wire directly to mic and speaker of intercom handset to get audio ? And is there any wire i can use to connect under press button of intercom (solder it under) to get proper door opener with possibility of longer unlock time ? Hope to hear soon from you. Thanx in advance. Best regards. Miki