PM5363 TUPP+622
TUPP+622
DATASHEET
PMC-1981421
ISSUE 4
SONET/SDH TRIBUTARY UNIT PAYLOAD PROCESSOR FOR 622 MBIT/S
INTERFACES
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 5
- Pointer Interpretation State Diagram
3 x eq_new_point
inc_ind /
NDF_enable
dec_ind
NORM
t
n
e
l
b
a
n
e
i
o
t
n
p
_
i
v
o
p
_
n
F
D
i
_
w
e
x
N
8
x
n
_
q
e
8
x
3
3 x AIS_ind
8 x inv_point
LOP
AIS
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
93
PMC [ PMC-SIERRA, INC ]
