International Revenue Share Fraud is a fraud scenario in which the fraudulent user earns money by directing lots of traffic to his or her own revenue share numbers.
Private Branch Exchange is a telephone exchange (often SIP based) that connects a business to a VoIP carrier (Communication Service Provider).
Real-time Transport Protocol. Used for transporting media. Defined in RFC 3550. For more information, see the IETF Tools website at:
Virtual Local Area Network is a technique to separate a network into distinct, isolated broadcast domains.