
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
406
Note : Diag_PosJust and Diag_NegJust must not be set to one at the same time. If that
occurs, their operation is disabled.
Diag_LOP
When set high, the Diag_LOP bit forces the SVCA to invert the outgoing NDF field of the
payload (selected path(s)) pointer causing downstream pointer processing elements to enter
a loss of pointer (LOP) state.
Diag_PAIS
When set high, the Diag_PAIS bit forces the SVCA to insert path AIS in the selected
outgoing stream for at least three consecutive frames. AIS is inserted by writing an all ones
pattern in the transport overhead bytes H1, H2, and H3, as well as in the entire STS
synchronous payload envelope. The first frame after PAIS negates will contain a new data
flag in the transport overhead H1 byte.
Diag_FifoAISDis
When set high, Diag_FifoAISDis bit forces the SVCA not to insert path AIS upon FIFO
overflow/underflow detection. When set low (normal operation), detection of FIFO
overflow/underflow causes path AIS to be inserted in the outgoing stream for at least three
consecutive frames. Also, both overflow and underflow interrupts are triggered. (FOVR
and FUDR)
Diag_NDFREQ
When set high, Diag_NDFREQ bit forces the SVCA to insert a NEW DATA FLAG
indication in the frame regardless of the state of the pointer generation state machine. This
register bit is not slef clearing.
Diag_TOH_PAIS
When set high, the Diag_TOH_PAIS bit allows path AIS to be inserted even during the
section/line overhead. When Diag_TOH_PAIS is zero, path AIS output can only be inserted
during the payload or during the H1, H2, and H3 bytes.
PTRDD[1:0]
The PTRDD[1:0] defines the STS-N/AU-N concatenation pointer bits DD. ITU requires
that DD be set to 10 when processing AU-4, AU-3 or TU-3. On the other side,
TELCORDIA does not specify these two bits.