"The purpose of this Standard is to define the BICC Bearer Control Tunneling Protocol. The BICC Bearer Control Tunneling Protocol is a generic tunneling mechanism for the purpose of tunneling Bearer Control Protocols (BCP) over the ""horizontal"" BICC interface between CCUs. This Standard defines the BICC Bearer Control Tunneling Protocol@ which transports the tunneled protocol data units (PDU) of the Bearer Control Protocols supported. It describes the coding and procedures for the identification of the tunneled Bearer Control Protocol. This Standard references the specific Bearer Control Protocols that are tunneled.1 1 A ""|"" indicates a change from ITU-T Recommendation Q.1990. Strictly editorial changes are not shown. "