test: SpecUA: sets iceCheckingTimeout as low as 0.5 seconds
test: SpecUA: sets iceCheckingTimeout as low as 0.5 seconds

http://sipjs.com/api/0.7.0/ua_configuration_parameters/#icecheckingtimeout
https://github.com/onsip/SIP.js/issues/162#issuecomment-106328604

onsip/SIP.js,ronlobo/SIP.js,markandrus/SIP.js,Escaux/SIP.js,onsip/SIP.js