Make a phone call from C# [closed]

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I live in a security complex, and to open the gate you have to phone a number, which is inconvenient when only ONE phone can open the gate! If I was to lose or forget my phone, no entry. So that's the back-story.

I want to be able to make a phone call to our gate system, from a C# app. It must look like it is comming from my current number, and because it only needs to dial (The line is never actually answered) I would prefer a free service.

Can someone please point me to such an API? I want to be able to only use an internet connection to make this phone call. I was looking at Twilio, but to test it, I need to pay. (Probably in case the call is answered, or they charge for the dialing time, that's the thing, I don't know how their charging is made, but I know the call is never answered, and would love to dial for free)

Answer 1

try out this may help.

    using Microsoft.Phone.Tasks;

PhoneCallTask phoneCallTask = new PhoneCallTask();

phoneCallTask.PhoneNumber = "2065550123";
phoneCallTask.DisplayName = "Gage";
phoneCallTask.Show();

https://msdn.microsoft.com/library/windows/apps/hh394025(v=vs.105).aspx

Answer 2

You can use AT Command, send an AT command to the port:

Using Basic AT Modem Commands
Hayes command set