I applied online. The process took 4 weeks. I interviewed at RingCentral (San Jose, CA) in Mar 2016
Interview
Half an hour interview, with main focus on SIP and TCP/IP protocols. Need to prepare everything related to layer 3 and layer 4 protocols in details. A knowledge of VOIP basics and protocols like SIp, RTP, H.323 is a plus.Not more focus on programming. All the TCP/IP protocol stack concepts need to be clear.
