I am getting ns_error_unexpected when there are two simultaneous "i_new_call" event occurs. Scenario 1 : When two intercom devices are pressed simultaneously, i receive two "i_new_call" event, after processing the events two icons are displayed on the screen to connect the call, when user click on connect there is no audio. And in console i can see "ns_error_unexpeted" from "addStream" method in SIPML5 js.
Scenario 2: when two intercom device are pressed one by one every thing works fine there is no "ns_error_unexpected" on cosole and both ends have audio
I am using Firefox 36.0.4 + SIMPL 1.5.23 + webrtc2sip + Asterisk 11.6 cert 9 on Red Hat 6