eugene1578 avatar image
eugene1578 asked Tyler Liu answered

i want to make app using ringcentral


i am ringcentral beginer.

i am developing app using the c# SDK.

Can i realize softphone using ringcentral c# sdk.?

i have several question.

question is follow.

1. how to Accept Incoming Call

2. In order to call, what should i do on code?.

I have realized about ring function at present. But I cant call(send and receive voice).

What do I have to next step?.

In a word, What should I do to go form ring to connected?

Please explain the step to call.

3. how to Creates SIP registration of a device/application?

my ringcentral accout info is as follow.

phoneNumber. 18059213091

pass TempPass1!

app: ringcentral_DesktopApp

Result to Creates SIP registration is follow.



curl -X POST --header "Content-Type: application/json" --header "Accept: application/json" --header "Authorization: Bearer U0pDMTFQMDFQQVMwMHxBQUEzQmFzcU1WVVpjWnNLemg1V0hJMkpGbEExNExWU21Cd0VuVnAweERZc2NubDhlcFhtY2Q1czhVT2dzenlQREkxNF9QWWRPMEVYNENYQjd4dmJsWHJoVHJNQURXT09Va3pUbnJ2enFlcXBkbTN3YjFDdGhGUXpXTDZXUjhrSGhLX3ZIZU5lVDNUUE50cnpRNWM4OEw5OEo1ejc1WmhSNE5PcUVfeHVObHkyNWZpNWxtZWNTRFFwSzc4M2ZYWWtWV0l8MGRybm93fDZCcV9Jc0ZlT0M3d0ZVUkJIUHFOTWc" -d "{\"sipInfo\":{\"transport\":\"WSS\"}}" ""

Request URL

Response Body


"errorCode": "CMN-301",

"message": "Request rate exceeded",

"errors": [


"errorCode": "CMN-301",

"message": "Request rate exceeded"




Response Code


Response Headers


"date": "Sat, 01 Jul 2017 23:23:37 GMT",

"content-length": "161",

"content-language": "en",

"routingkey": "SJC11P01",

"content-type": "application/json"


i am sure that you will help me well.

getting started
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1 Answer

Tyler Liu avatar image
Tyler Liu answered
As far as I can tell, it's impossible to implement a working soft phone with merely C#. There is no way to accept a call with C#. There is also no way to make a call directly except Ringout.

If you want to create a soft phone programmatically, you can take a look at webrtc. And here is the library:

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Developer sandbox tools

Using the RingCentral Phone for Desktop, you can dial or receive test calls, send and receive test SMS or Fax messages in your sandbox environment.

Download RingCentral Phone for Desktop:

Tip: switch to the "sandbox mode" before logging in the app:

  • On MacOS: press "fn + command + f2" keys
  • On Windows: press "Ctrl + F2" keys