
PM5317 SPECTRA-9953 Telecom Standard Product Data Sheet
Release
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2000741, Issue 5
97
Notes
1. Active offset is defined as the accepted current phase of the SPE (VC) in the NORM_state and is
undefined in the other states.
2. Enabled NDF is defined as the following bit patterns: 1001, 0001, 1101, 1011 and 1000.
3. Disabled NDF is defined as the following bit patterns: 0110, 1110, 0010, 0100 and 0111.
4. The remaining six NDF bit patterns (0000, 0011, 0101, 1010, 1100, 1111) result in an INV_POINT
indication.
5. ss bits are unspecified in SONET and have bit pattern 10 in SDH.
6. The use of ss bits in definition of indications may be optionally disabled.
7. The requirement for previous NDF_ENABLE, INC_IND or DEC_IND be more than 3 frames ago may
be optionally disabled.
8. NEW_POINT is also an INV_POINT.
9. The requirement for the pointer to be within the range of 0 to 782 in 8 X NDF_ENABLE may be
optionally disabled.
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.
- When the received pointer returns to an in-range value, the
SPECTRA-9953 will interpret it correctly.
The transitions indicated in the state diagram are defined as follows:
INC_IND/DEC_IND:
Offset adjustment (increment or decrement indication)
3 x EQ_NEW_POINT:
Three consecutive equal NEW_POINT indications
NDF_ENABLE:
Single NDF_ENABLE indication
3 x AIS_IND:
Three consecutive AIS indications
8 x INV_POINT:
Eight consecutive INV_POINT indications
8 x NDF_ENABLE
: Eight consecutive NDF_ENABLE indications
Notes
1. The transitions from NORM_state to NORM_state do not represent state changes but imply offset
changes.
2. 3 x EQ_NEW_POINT takes precedence over other events and may optionally reset the INV_POINT
count.
3. All three offset values received in 3 x EQ_NEW_POINT must be identical.
4. "Consecutive event counters" are reset to zero on a change of state (except the INV_POINT counter).