
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
88
On the transmit side, the 16 independent links of the Add bus are fed to 16 independent 8B/10B
decoders. Each decoder feeds a transmit processing slice (SHPI, TSVCA, THPP, TTTP_PATH,
TRMP, TTTP_SECTION). As on the receive side, there are 16 transmit processing slices that
form one group when processing an STS-192/STM-64 stream or four groups when processing
four STS-48/STM-16 streams. The output of each slice feeds the STLI that performs the
required byte interleaving before line transmission.
While in Quad STS48 Mode, the Spectra-9953 can be configured to carry any mix of
STS-1/3c/12c/24c/36c/48c payloads. STS-3c/12c concatenated paths cannot overlap more than
one slice (i.e. an STS-3c could not start in slice 2,2 and finish in slice 2,3). STS-24c and STS-
36c payloads must take exactly 2 and 3 slices, respectively.
While in Single STS192 mode, the Spectra9953 can be configured to carry any mix of
STS-1/3c/12c/(Nx12)c/192c payloads. Payloads larger than STS48c can overlap processing
quadrants, but must begin at slice x,1 in order to do so. For instance, an STS-72c payload is
allowable, but it could not start at slice 1,2 and finish at slice 2,4. It could, however, exist from
slice 3,1 to slice 4,3.