PM7347 datasheet(104/341 Pages) PMC

104 / 341 page

S/UNI®-JET Data Sheet

Released

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use

104

Document ID: PMC-1990267, Issue 3

Bit

Type

Function

Default

Bit 7

Unused

Bit 6

LSS[2]

Bit 5

LSS[1]

Bit 4

LSS[0]

Bit 3

Unused

Bit 2

YELV

Bit 1

LOFV

Bit 0

OOFV

The OOFV bit indicates the current PLCP OOF defect state. When an error is detected in both

the A1 and A2 octets or when an error is detected in two consecutive path overhead identifier

octets, OOFV is set to logic one. When the S/UNI-JET has found two valid, consecutive sets

of A1 and A2 octets with two valid and sequential path overhead identifier octets, the OOFV

bit is set to logic zero.

LOFV

The LOFV bit indicates the current PLCP LOF defect state. The LOF defect state is an

integrated version of the OOF defect state. The declaration/removal times for the LOF defect

state depends on the selected PLCP format. These are summarized in Table 12:

Table 12 PLCP LOF Declaration/Removal Times

PLCP Format

Declaration (ms)

Removal (ms)

DS3

E3 G.751

1.12

DS1

250

200

If the OOF defect state is transient, the LOF counter is decremented at a rate 1/12 (DS3

PLCP) or 1/10 (DS1 or E1 PLCP) or 1/9 (G.751 E3 PLCP) of the incrementing rate.

YELV

The YELV bit indicates the current PLCP yellow alarm defect state. YELV is set to a logic

one when ten or more consecutive frames are received with the yellow bit (contained in the

path status octet) set to a logic one. YELV is set to a logic zero when ten or more consecutive

frames are received with the yellow bit (contained in the path status octet) set to a logic zero.

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