ATMv2 problem with doorphone / building intercom 1

[ACSscott]

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?

 

[TouchToneTommy]

The ATM-V2 cards do an automatic impedance test, and that's the "loud digital feedback sound" you're hearing. There's no way to disable it, that I've seen. Doorphones seem to do much better as an analog STATION port instead of a Trunk port.

 

[DavidCT]

I saw something similar on a Doorking driveway entry device. The fix was to install a Viking RG-4 between the Doorking and the IP Office. The specific issue was the IP Office needs a Sine Wave ring pattern, and the Doorking was using something different.

https://www.vikingelectronics.com/products/pdf/rg-4.pdf

 

[ACSscott]

Thanks to you both.
David - The RG-4 actually looks better than the TBB-1B I was looking at. Thanks.
Tommy - I definitely always try to do the doorphones as a station port with ringdown to the door hunt group. However in this case it's the existing building intercom where 8 floors down the user is dialing a 4-digit number and then it rings to a dedicated analog phone in the customer's suite. I can't think of any way that would work on a station port... in essence it is already an analog station port itself.

 

[intrigrant]

With a station port you can program whatever you want, with a trunk you cannot.
Please explain in detail what the problem is when using it as a station instead of a trunk.

 

[ACSscott]

Thanks for your replies. I hadn't imagined this sort of connection would work with an analog station, maybe I'm just not getting my head around it? So I tried.
1. Connected the analog intercom connection to an analog station port on the IPO, set it as a ringdown (?D shortcode) and when you dial from the intercom, I just hear the dialtone at the building intercom speaker, does not ring on the IPO.
2. Removed the ringdown shortcode and set the analog station as a coverage appearance on the receptionist's phone. Same thing.

Any idea how I can get this to work through the analog station?

 

[Telecomboy]

Make sure you do not have any lines assigned to the door phone. If it is going off-hook on a line it won't properly dial the ?D short code. If you have no lines assigned, connect an analog phone direct to the port you are using and see what happens when you go off-hook. My guess is that the same thing will happen. If it does, the issue would appear to be your ?D short code. Where do you have that dialing?

 

[ACSscott]

button programming for that analog station is completely blank. ?D shortcode is fine; set to 'dial direct' and when I connect an analog phone to it and go off hook it dials the hunt group I have it set to. again, this is not a doorphone I installed but rather a connection to the building intercom. it is connected to an analog phone and works fine. that's why i wanted to connect it to a trunk port.

if you know how I can make it work with the station port I'm all ears... I didn't imagine it would be possible.