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ATMv2 problem with doorphone / building intercom

Paul Pulver
post Aug 9 2018, 11:37
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I've run into this twice now in the past month. In one instance, it was a doorphone that was working on a 500v1, and when I replaced it with a 500v2 and new DS8's and ATMv2 cards, the doorphone would not work. Specifically you press the doorphone, it emits a half ring, a beep and then a loud digital feedback sound. The IP Office sees nothing. Luckily, here they had an old Analog Trunk 16 module which I reinstated and it worked on this. Another site, a building intercom system. No ATMv1 to use here, and it does the exact same thing on my 500v2 r9.1.4 on a v2 combo card. Working fine for now on an analog telephone, but they wanted it run through the system. Thinking of using a Viking TBB-1B or some other talk battery booster type thing, as I surmise that it might be a talk or ringing voltage issue. What's the voltage coming from this building intercom? Great question, me. I will have to bring my volt meter to site. Has anyone else run into this?

Any help will be apprecited.

I didn't find the right solution from the Internet.

video demonstration

Thank you.
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