PM5362TUPP-PLUS
DATA SHEET
PMC-951010
ISSUE 6
SONET/SDH TRIBUTARY UNIT PAYLOAD PROCESSOR / PERFORMANCE MONITOR
AIS_state (AIS)
LOP_state (LOP)
The transition between states will be consecutive events (indications), e.g., three
consecutive AIS indications to go from the NORM_state to the AIS_state. The
kind and number of consecutive indications activating a transition is chosen such
that the behaviour is stable and insensitive to low BER. The only transition on a
single event is the one from the AIS_state to the NORM_state after receiving a
NDF enabled with a valid pointer value. It should be noted that, since the
algorithm only contains transitions based on consecutive indications, this implies
that, for example, non-consecutively received invalid indications do not activate
the transitions to the LOP_state.
Figure 1
- Pointer Interpretation State Diagram
3 x eq_new_point
inc_ind /
NDF_enable
dec_ind
NORM
3 x eq_new_point
NDF_enable
3 x AIS_ind
8 x inv_point
8 x NDF_enable
3 x eq_new_point
3 x AIS_ind
LOP
AIS
8 x inv_point
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
44
PMC [ PMC-SIERRA, INC ]
