We're adding to our Voice over IP With tonight's release, two Voice Layer test types that have been in beta testing are moving into general availability, to join the existing RTP Stream test type. The SIP Server test allows customers to verify functionality and performance of a SIP server on the local network or in the cloud. This test type performs either a "SIP ping" (issue the OPTIONS command from the SIP protocol) and (optionally) performs registration with the target SIP server. The Voice Call test combines the functionality of the SIP Server and the RTP Stream tests to simulate a full voice call between two ThousandEyes Agents. As with other ThousandEyes tests, the new Voice Layer tests also provide a Network View for troubleshooting issues below the application layer.