Alcatel 1660SM Technical Handbook page 204

Side A to Side B description:
•
LSUT (Lower Order Supervisory Unequipped Termination)
It is used to monitor unequipped path trails; it inserts VC–m unequipped signal label, path
trace, BIP–2, REI and RDI.
•
LPC (Low Order Path Connection)
It assigns lower order VCs of level m at its input ports to lower order VCs of level m at
its output ports. The process does not affect the nature of the characteristic information
of the signal.
•
LPOM (Lower Order Path Monitor)
It is used for performance monitoring purpose and for lower order SNCP/n.
•
HPA (High Order Path Adaptation)
This function provides VC–4 assembly, TU pointer generator, TU–AIS.
•
HPT (High Order Path Termination)
It performs path trace identification insertion, RDI and REI insertion VC–4 BIP–8
calculation and insertion, signal label insertion.
•
HPOM (High Order Path Overhead Monitoring)
It monitors the higher order VC–4 for errors, and recover the trail termination status. it
extract the payload independent overhead bytes J1, G1, B3.
•
HPC (High Order Path connection)
This function assign higher order VCs of level n at its input port to higher order VCs of level
n at its output port.
•
HSUT (Higher Order Supervisory Unequipped Termination)
It generates and inserts an unequipped container, trail trace identifier, RDI and REI, VC–4
BIP–8.
•
MSA (Multiplex Section Adaptation)
It performs AUG assembly, AU–4 pointer generation, AU–AIS generation
•
MSP (Multiplex Section Protection) and MSPC (Multiplex Section Protection Connection)
It provides protection for the STM–N signal against failures within a multiplex section, by
using a bit oriented protocol for the MSP bytes K1,K2 and P, B1.
•
MST (Multiplex Section Termination)
It performs BIP–24 calculation and insertion, MS–REI, MS–RDI and MS–AIS insertion.
•
RST (Regenerator Section Termination)
It performs frame alignment insertion , regenerator section path trace insertion BIP–8 (B1)
calculation and insertion.
•
SPI (Synchronous Physical Interface)
Signal conditioning for transmission medium
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