Which of the following types of conference calls can support more than three parties?
Which of the following choices below contains all the messages that SIP is required to act on during the request/response handshake?
Which header in the INVITE message will SIP Server analyze in order to select the proper geo-location for an inbound call?
Using SIP default settings, after how many seconds will an endpoint will be marked "out of service" without a response following an INVITE message?
