Which SIP Method is used by Active out of Service Detection to check a device for out of service status?
SIP Server starts successfully. However, its status on SCS is "Service Unavailable" and SIP Server distributes EventLinkDisconnected to clients. Which of the following circumstances would be responsible for the status and EventLinkDisconnected message?
T-Lib messages can be mapped to all of the SIP messages listed below except which of the following?
Which of the following choices below contains all the messages that SIP is required to act on during the request/response handshake?
In a SIP direct call setup, what message does the originating UAC send to the UAS of the recipient?