Alcatel 1660SM Technical Handbook page 458

From LPC matrix to HPC matrix
HPA (Sn/Sm_A_So) : VC4 assembly, TU pointer generation, TU–AIS generation , signal label
insertion,
HPT (Sn_TT_So) : path trace identification insertion, RDI and REI indications insertion, VC–4 BIP–8
calculation and insertion.
Moreover:
F2 and F3 byte insertion (Tx side) : F2/F3 bytes are inserted on the DCC frame
N1 byte insertion (Tx side) : for the network Tandem Connection Termination & Monitoring function
(TCT/TCM).
The G.A. provides also the HSUT, HPOM, (alternative) and LSUT, LPOM functions (alternative) both in
Rx and Tx side.
The main task of HSUT are:
RX side (from MSA to HPC matrix):
•
path trace information recovery
•
REI recovery
•
HP–RDI detection (path status monitoring
•
UNEQ and VC–AIS detection (signal label monitoring)
•
VC4 BIP–8 Errored Block count
Tx side: (from HPC matrix to MSA)
•
generation of an unequipped container
•
"unequipped" insertion, trail trace identifier generation
•
RDI and /or REI information generation
•
VC–4 BIP–8 calculation and insertion
The main task of HPOM are:
RX and TX side:
•
signal termination
•
J1 path recovering
•
REI information recovering
•
HP–RDI detection (path status monitoring
•
UNEQ and VC–AIS detection (signal label monitoring)
•
VC4 BIP–8 Errored Block count
•
TSF is generated in case of SSF , UNEQ, TIM , AIS . TSD is generated in case of SD
The main tasks of LSUT are :
RX side (from HPA to LPC matrix):
•
recovering of VC–m unequipped signal label
•
path trace recovering
•
BIP–2 recovery
•
REI and RDI recovery
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