PM5381-BI PMC-Sierra, Inc., PM5381-BI Datasheet - Page 517

• Manufacturer Part Number: PM5381-BI
• Description: ATM UNI, Single Channel ATM PHY Interface for 2488.32Mbps
• Manufacturer: PMC-Sierra, Inc.

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2000489, Issue 4
The RHPP accumulates path bit interleaved parity (BIP-8) errors and path remote error indication
(REI-P) errors for each of the STS (VC) payloads. The path BIP-8 errors are serially output on a
low speed serial port (note, for the S/UNI-2488, only RHPP#1 can serially output BIP-8 errors).
Microprocessor readable registers are provided to allow accumulated path BIP-8 errors and path
REI errors to be read out at intervals of up to 1 second. Optionally, the RHPP can be configured
to accumulate block BIP-8 errors and to extract block REI errors.
The RHPP extracts the path payload signal label byte (PSL-P) from the C2 byte of the STS (VC)
payloads. Two algorithms are defined to detect path payload label unstable (PLU-P), path
payload label mismatch (PLM-P), path unequipped defect (UNEQ-P) and path payload defect
indication (PDI-P) defects on the PSL. The first algorithm is compliant to BELLCORE
specifications and the second algorithm is compliant to ITU specifications.
The RHPP detects path remote defect indication (RDI-P) and path enhanced remote defect
indication (ERDI-P) defects on the G1 byte of the STS (VC) payloads and indicates their status
on two separate ports PRDI and PERDI. The accepted path ERDI value is stored in a
microprocessor readable register.
The RHPP supports path REI and path ERDI inband error reporting by optionally regenerating
the G1 byte with updated path REI and path RDI values that must be returned to the far end.
The receive path overhead (RPOH) port serially outputs the path overhead (POH) bytes of the
STS (VC) payloads of the first STS-12. A 20.736 MHz clock is generated to provide timing for
the RPOH port.
The RHPP provides an interrupt output to indicate any change in the status of pointer
justifications (NJE, PJE), path loss of pointer (LOP-P, LOPC-P), path alarm indication signal
(AIS-P, AISC-P), path payload signal label (PSL-P), path payload label unstable (PLU-P), path
payload label mismatch (PLM-P), path unequipped (UNEQ-P), path payload defect indication
(PDI-P), path remote defect indication (RDI-P) and path enhanced remote defect indication
(ERDI-P) or any path BIP-8 errors and path remote error indication (REI-P) errors. An internal
register can be read to identify the interrupt source. Each interrupt source is individually mask-
able.
Note that while the RHPP will perform path-level processing on the receive data stream, the
S/UNI-2488 does not perform consequential action of asserting RDI-P for path level alarms.
Each SVCA aligns the transport overhead of an STS-12 stream to a new reference signal
(APSIFP). The alignment is accomplished by recalculating the STS payload pointer value based
on the offset between the transport overhead of the incoming and outgoing streams
The SVCA can be used to process higher concatenated payloads (STS-48c/VC4). An STS-
48c/VC-4-16c is processed by four SVCAs. The first SVCA is master and the three others are
slaves.
S/UNI-2488 Telecom Standard Product Datasheet
Released
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