server.rtp.strictSdpMediaPortUse
                                                    Specifies whether the server accepts packets from ports other than the UDP port and IP address.
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                                                                     Value  | 
                                                                
                                                                     Boolean 1 (default): rejects packets from any other port. 0: the server does not check the UDP port, and accepts packets from any port. DEFAULT: 1  | 
                                                            
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                                                                     How to set  | 
                                                                
                                                                     If using the Management Station, set on the Speech Server service. If not using Management Station, set in an NSS configuration file (user-NSSxx.txt).  | 
                                                            
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                                                                     Usage  | 
                                                                
                                                                     Seldom changed.  | 
                                                            
By default, the server only accepts packets from the UDP port and IP address defined in the SIP/RTSP setup (in the SDP offer/answer).