PM5343STXC View Datasheet(PDF) - PMC-Sierra
Part Name
Description
MFG CO.
'PM5343STXC' PDF : 198 Pages View PDF
DATA SHEET
PMC-930303
ISSUE 6
PM5343 STXC
SONET/SDH TRANSPORT OVERHEAD TRANSCEIVER
• Insert the line AIS maintenance signal in the mate STXC
• Insert line REI information in the mate STXC.
The same APS byte values must be seen for three consecutive frames before
being shifted out on the receive ring control port. The change of filtered APS
byte value status is high for one frame when a new, filtered APS value is shifted
out.
The protection switch byte failure alarm bit position is high when twelve
consecutive frames, where no three consecutive frames contain identical K1
bytes have been received. The bit position is set low when three consecutive
frames containing identical K1 bytes have been received. The change of
protection switch byte failure alarm status bit position is set high for one frame
when the alarm state changes.
The insert line RDI bit position is set high under register control, or when loss of
signal, loss of frame, or line AIS alarms are declared. The insert line AIS bit
position is set high under register control only.
The insert line REI bit positions are high for one bit position for each detected B2
bit error. Up to 24 REIs may be indicated per frame for an STS-3/STM-1 signal.
9.6 Transmit Transport Overhead Access
The Transmit Transport Overhead Access block (TTOH) allows the complete
transport overhead to be inserted using the TTOH, along with the 5.184 MHz or
1.728 MHz transport overhead clock, TTOHCLK, and the transport overhead
frame position, TTOHFP. The transport overhead enable signal, TTOHEN,
controls the insertion of transport overhead from TTOH. The STXC also supports
upstream insertion of the line overhead using the TDIS input. TDIS is used to
disable the insertion of transport overhead either from the TTOH bus, or from the
individual channels (TSD, TSOW, TSUC, TLD, TAPS, and TLOW).
9.7 Transmit Line Overhead Processor
The Transmit Line Overhead Processor block (TLOP) processes the line
overhead of the transmit stream. It can be configured to process an STS-1, or
STS-3 (STM-1) stream that is presented in byte serial format at the rate of 6.48
Mbyte/s, or 19.44 Mbyte/s respectively.
The TLOP optionally inserts the line data communication channel, the line order
wire channel, and the automatic protection switch channel into the line overhead
of the transmit stream. These line overhead channels are separately fed to the
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 40
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