PM5366-PI datasheet(109/267 Pages) PMC

109 / 267 page

PRELIMINARY

PM5366 TEMAP-84

DATASHEET

PMC-2010672

ISSUE 1

HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER

AND M13 MULTIPLEXER

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.

9.23.1 Error Monitor

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

- Path Signal Label Mismatch State

Expected PSL

Accepted PSL

PSLM State

000

Match

000

001

Mismatch

000

PDI Code

Mismatch

000

XXX

≠ 000, 001, PDI Code

Mismatch

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