PMC-Sierra, Inc.
PRELIMINARY
PM5381 S/UNI-2488
DATASHEET
PMC-2000489
ISSUE 1
SATURN USER NETWORK INTERFACE FOR 2488 MBIT/S
INC_IND:
disabled NDF + ss + majority of I bits inverted + no majority
of D bits inverted + previous NDF_ENABLE, INC_IND or
DEC_IND more than 3 frames ago.
DEC_IND:
disabled NDF + ss + majority of D bits inverted + no majority
of I bits inverted + previous NDF_ENABLE, INC_IND or
DEC_IND more than 3 frames ago.
INV_POINT:
not any of the above (i.e.: not NORM_POINT, not NDF_ENABLE,
not AIS_IND, not INC_IND and not DEC_IND).
NEW_POINT:
disabled NDF + ss + offset value in range of 0 to 782 but not
equal to active offset.
Note 1:
Note 2:
Note 3:
Note 4:
active offset is defined as the accepted current phase of the SPE (VC) in
the NORM_state and is undefined in the other states.
enabled NDF is defined as the following bit patterns:
1001, 0001, 1101, 1011 and 1000.
disabled NDF is defined as the following bit patterns:
0110, 1110, 0010, 0100 and 0111.
the remaining six NDF bit patterns (0000, 0011, 0101, 1010, 1100, 1111)
result in an INV_POINT indication.
Note 5:
Note 6:
Note 7:
ss bits are unspecified in SONET and have bit pattern 10 in SDH.
the use of ss bits in definition of indications may be optionally disabled.
the requirement for previous NDF_ENABLE, INC_IND or DEC_IND be
more than 3 frames ago may be optionally disabled.
Note 8:
Note 9:
NEW_POINT is also an INV_POINT.
the requirement for the pointer to be within the range of 0 to 782 in
8 X NDF_ENABLE may be optionally disabled.
Note 10:
LOP is not declared if all the following conditions exist:
- the received pointer is out of range (>782),
- the received pointer is static,
- the received pointer can be interpreted, according to majority voting on
the I and D bits, as a positive or negative justification indication,
after making the requested justification, the received pointer continues
to be interpretable as a pointer justification.
Proprietary and Confidentail to PMC-Sierra Inc., and for its Customer’s Internal Use
56
PMC [ PMC-SIERRA, INC ]
