Rainbow Electronics DS33M33 - Manual (Page 8)

___________________________________________________ DS33M30/M31/M33 ABRIDGED DATA SHEET
Rev: 111908 8 of 20
1.3.3 STS-3c/AU-4 Pointer Processing
1.3.3.1 STS-3c/AU-4 Pointer Generation
• AU-4 pointer generation using the associated Add STS-3/STM-1 clock
• Pointer generation of outgoing pointer values (H1/H2) per ITU G.707 specifications
• Generation of AU-4 pointer bytes (H1, H2, and H3) and insertion of the VC-4 POH
• User-configurable automatic or manual generation of AIS-P
• Generation of an unequipped indication (“all zero” path (payload data and POH) with valid J1, B3, and G1)
• Comprehensive software programmable pointer (H1, H2) diagnostics
1.3.3.2 STS-3c/AU-4 Pointer Interpretation
• AU-4 pointer interpretation using the Drop STS-3/STM-1 clock
• Pointer interpretation per ITU G.707 specifications
• Extraction of AU-4 pointer bytes (H1, H2, and H3) and the VC-4 POH
• Detection of alarm defects including LOP and “all ones” pointer (AIS-P)
• Detection and accumulation of incoming pointer increments, decrements, changes, and new pointers
1.3.4 STS-3c SPE/VC-4 Path Termination
1.3.4.1 STS-3c SPE/VC-4 Path Overhead Generation
• Generation of all POH bytes including Path trace ID (J1), Path BIP-8 (B3), Path signal label (C2), Path
status (G1), Path user byte (F2), Path concatenation indicator (H4), and Path growth (Z3, Z4, and Z5)
• All POH bytes can be inserted from either the VC-4 POH input port or software accessible internal registers
• User configurable automatic or manual generation of PTE defects including RDI-P and ERDI-P
• Programmable error insertion of B3 and REI errors
• Insertion of HDLC data stream into path user byte (F2)
• Insertion of path trace ID into path trace byte (J1)
1.3.4.2 STS-3c SPE/VC-4 Path Overhead Reception and Monitoring
• Monitoring of all POH bytes including Path trace ID (J1), Path BIP-8 (B3), Path signal label (C2), Path
status (G1), Path user byte (F2), Path concatenation indicator (H4), and Path growth (Z3, Z4, and Z5)
• All POH bytes are presented to the VC-4 POH output port and software accessible internal registers
• PTE defect detection: PLM-P, PLU-P, UNEQ-P, PDI-P, RDI-P, and Enhanced RDI-P (ERDI-P)
• Detection and accumulation of Path BIP-8 (B3) errors and Path REI errors (part of G1) on a bit or block
basis
• Two POH B3 bit-error rate (BER) measurement circuits with separate software programmable detection
and clearing thresholds
• Extraction of HDLC data stream from path user byte (F2)
• Extraction of path trace ID from path trace byte (J1)
1.3.4.3 STS-3c SPE/VC-4 Payload Mapper/Demapper
• Mapping of Ethernet traffic into/out of VC-4 payload (C-4).
1.3.5 STS-3 Mux/Demux (DS33M31 and DS33M33 Only)
1.3.5.1 STS-3 Mux
• Multiplexing of three TU-3 data streams (or ports) into a C-4 per ITU G.707
• Multiplexing of three STS-1/AU-3 data streams (or ports) into an STS-3/STM-1 per ITU G.707 and
Telcordia GR-253
1.3.5.2 STS-3 DeMux
• Demultiplexing of three TU-3 data streams (or ports) from a C-4 per ITU G.707
• Demultiplexing of three STS-1/AU-3 data streams (or ports) from an STS-3/STM-1 per ITU G.707 and
Telcordia GR-253