mozilla-b2g/firefoxos-loop-client — pull request #96 by jaoo (2014-08-22 17:01:52+00:00)
Title: Bug 1039168 - FxOS Loop client app needs to reject incoming calls with a reason of "busy" if already on a call

See bug https://bugzilla.mozilla.org/show_bug.cgi?id=1039168 please.