PM5366-PI PMC-Sierra, Inc., PM5366-PI Datasheet - Page 109

• Manufacturer Part Number: PM5366-PI
• Description: HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER AND M13 MULTIPLEXER
• Manufacturer: PMC-Sierra, Inc.

PRELIMINARY
DATASHEET
PMC-2010672
9.23.1 Error Monitor
PROPRIETARY AND CONFIDENTIAL
end block error codes. Incoming path signal label is debounced and compared
with the provisioned value. Path signal label unstable, path signal label
mismatch and change of path signal label event are identified.
The error monitor block contains a set of 12-bit counters that are used to
accumulate tributary path BIP-2 errors, and a set of 11-bit counters to
accumulate far end block errors (FEBE). The contents of the counters may be
transferred to a holding RAM, and the counters reset under microprocessor
control.
Tributary path BIP-2 errors are detected by comparing the tributary path BIP-2
bits in the V5 byte extracted from the current multiframe, to the BIP-2 value
computed for the previous multiframe. BIP-2 errors may be accumulated on a
block or nibble basis as controlled by software configurable registers. Far end
block errors (FEBEs) are detected by extracting the FEBE bit from the tributary
path overhead byte (V5).
Tributary path remote defect indication (RDI) and remote failure indication (RFI)
are detected by extracting bit 8 and bit 4 respectively of the tributary path
overhead byte (V5). The RDI is recognized when bit 8 of the V5 byte is set high
for five or ten consecutive multiframes while RFI is recognized when bit 4 of V5
is set high for five or ten consecutive frames. The RDI and RFI bits may be
treated as a two-bit code word. A code change is only recognized when the code
is unchanged for five or ten frames.
The tributary path signal label (PSL) found in the tributary path overhead byte
(V5) is processed. An incoming PSL is accepted when it is received unchanged
for five consecutive multiframes. The accepted PSL is compared with the
associated provisioned value. The PSL match/mismatch state is determined by
the following:
Table 2
Expected PSL
000
000
000
000
- Path Signal Label Mismatch State
Accepted PSL
000
001
PDI Code
XXX ≠ 000, 001, PDI Code
ISSUE 1
97
PSLM State
Match
Mismatch
Mismatch
Mismatch
HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER
AND M13 MULTIPLEXER
PM5366 TEMAP-84