To limit the number of SIP user names that CDRouter will create, set the testvar sipMaxUserNames to the limit value. If this testvar is set to -1, CDRouter will create a unique name and phone number for each test case. Some routers with SIP proxy support limit the number of unique users that can be registered. If no limits should be placed on the SIP user names, this testvar should be set to -1. NOTE: Some tests will still create multiple user names if the test needs to exercise more than one SIP endpoint or an endpoint with a specific URI.