Alcatel 1850 TSS-320 Technical Handbook page 90

a) Plesiochronous Physical layer
Note that q = 12,11.
• Physical Trail Termination (PPI): Eq_TT
Eq_TT_Sk
Electrical signal recovery
LOS detection
Eq_TT_So
Generation of the electrical signal
• 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) LO Path Layer
• Lower Order Path adaptation to PDH client layer (LPAm): Sm/Pqx_A
Sm/Pqx_A_Sk
K4 byte extraction for PLM detection
Client signal demapping
Sm/Pqx_A_So
K4 byte insertion
Client signal mapping
Alcatel 1850 TSS-320 Rel. 1.1
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Technical Handbook Common
Functional Description