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Sometimes, facing below issue while sdk.Platform.Login(Username, Extension, Password, true).

A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 199.255.120.210:443


Why?????

Maybe network issue ... see the reference:

https://community.ringcentral.com/questions/1512/cannot-establish-connection-with-ring-central-serv.html

I don't think it is our server problem. You use your own .Net SDK, right?

Check out this discussion.

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