Section: 10.3.2 Composition of the FPBI 10.3.2.1 FPBI general structure
Content: bit No 19 1 +-------------------------------------+ | | | +-------------------+ Type| Significant Part | FPBI 19 bits <-------------------------------------> Figure 14: General structure of FPBI The FPBI is composed of the following elements: - FPBI Type. Its length is 2 bits; - FPBI Significant Part. Its length is 17 bits. NOTE: The three LSBs bits of the FPBI form the 3-bit training sequence code (TSC). See 3GPP TS 45.056[ None ]  [35]. The following FPBI Type values have been allocated for use by CTS: 00 FPBI class A: residential and single-cell systems; 01 FPBI class B: multi-cell PABXs. All other values are reserved and CTS-MSs shall treat these values as FPBI class A.