click to call action using in ember js

Am using ember-bootstrap nav component. The sidebar(on mobile view) is not collapsing when am using <a href='tel:'123-456-7890' class="">Call Us. While searching on their official site, I found that with we can achieve this. But when am giving it a try its giving errors Assertion Failed: You attempted to define a '' but did not pass the parameters required for generating its dynamic segments. There is no route named tel: 123-456-7890". Any suggestions?