This string contains the SIP URL for the destination of the phone call. If you are developing 
a PSTN gateway, you will use this member to get the PSTN phone number. Most applications 
can ignore this member. Please refer to the installed SIP RFCs for a description of the 
format of SIP URLs (RFC 3261).
    Namespace: 
   LanScapeAssembly: LMEVoipManaged (in LMEVoipManaged.dll) Version: 6.0.5226.26700
