PM5381-BI PMC-Sierra, Inc., PM5381-BI Datasheet - Page 83

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

10.5.2
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2000489, Issue 4
8 x NDF_ENABLE
Note 1:
Note 2:
Note 3:
Note 4:
LOP is declared on entry to the LOP_state after eight consecutive invalid pointers or eight
consecutive NDF enabled indications
PAIS is declared on entry to the AIS_state after three consecutive AIS indications
Concatenation Pointer Interpreter State Machine
The concatenation pointer interpreter extracts and validates the H1 and H2 concatenation bytes.
Within the pointer interpretation algorithm three states are defined as shown below.
·
·
·
The transitions between the states will be consecutive events (indications), e.g. three consecutive
AIS indications to go from the CONC_state to the AISC_state. The kind and number of
consecutive indications activating a transition is chosen such that the behavior is stable and
insensitive to low BER.
CONC_state (CONC)
AISC_state (AISC)
LOPC_state (LOPC)
the transitions from NORM_state to NORM_state do
not represent state changes but imply offset changes.
3 x EQ_NEW_POINT takes precedence over other
events and may optionally reset the INV_POINT count.
all three offset values received in 3 x Q_NEW_POINT
must be identical.
"consecutive event counters" are reset to zero on a
change of state (except the INV_POINT counter).
eight consecutive NDF_ENABLE indications
S/UNI-2488 Telecom Standard Product Datasheet
Released
83