PM7345S Datasheet, PDF (135/306 Pages) PMC-Sierra, Inc – SATURN USER-NETWORK INTERFACE FOR ATM PLESIOCHRONOUS DIGITAL HIERARCHY DATACOM

DATA SHEET
PMC-931011
ISSUE 6
PM7345 S/UNI-PDH
SATURN USER-NETWORK INTERFACE
Register 2BH: SPLR Status
Bit
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Type
R
R
R
R
R
R
Function
Unused
LSS[2]
LSS[1]
LSS[0]
Unused
YELV
LOFV
OOFV
Default
X
X
X
X
X
X
X
X
OOFV:
The OOFV bit indicates the current PLCP out of frame 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 1. When the
S/UNI-PDH 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
0.
LOFV:
The LOFV bit indicates the current PLCP loss of frame defect state. The loss of
frame defect state is an integrated version of the out of frame defect state. The
declaration/removal times for the loss of frame defect state depends on the
selected PLCP format, and are summarized in the table below:
PLCP Format
DS3
G.751 E3
DS1
E1
Declaration (ms)
1
1.12
25
20
Removal (ms)
12
10
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
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 121