Alcatel 1850 TSS-320 Technical Handbook page 88

• Physical Layer adaptation to PDH client: Eq/Pqx_A
Eq/Pqx_A_Sk
Clock recovery
Signal decoding
Eq/Pqx_A_So
Signal encoding
• Physical Layer adaptation to framed PDH client: Eq/Pqe_A
Eq/Pqe_A_Sk
Clock recovery
Signal decoding
Frame alignment with LOF detection
Eq/Pqe_A_So
Signal encoding
• Framed PDH client monitoring: Pqem
Pqem_Sk
RDI detection
Near End errored block count
b) HO Path Layer
• High Order Path adaptation to PDH client layer (LPAn): Sn/Pqx_A
Sn/Pqx_A_Sk
C2 byte extraction for PLM detection
Client signal de-mapping
Sn/Pqx_A_So
C2 byte insertion
Client signal mapping
• High Order Path trail termination (HPT): Sn_TT
As described in section 3.4.2.1 on page 79.
• VC-4 Tandem Connection Trail Termination: SnD_TT
As described in section 3.4.1.1 on page 71.
• VC-4 Tandem Connection Adaptation: SnD_A
As described in section 3.4.1.1 on page 71.
Alcatel 1850 TSS-320 Rel. 1.1
86/270 8DG 07734 AAAA Edition 01
Technical Handbook Common
Functional Description