I have a problem with webex-js-sdk and the Webex with UCM phones

[andrews239]

Hello.

My webex client has no problem with registration and calling.

For some reason i have to use webex-js-sdk for test/automation.

https://webex.github.io/webex-js-sdk/samples/calling/ lets me to auth,
But on [register] button i got error:
"User is not configured for WebRTC calling. Please contact the administrator to resolve this issue."

Do I have a chance to use webex-js-sdk in my case?

I have been spending time a lot, to "play" with webex-js-sdk, but i didn't get any descriptions of the restrictions...

Thanks