PM5362TUPP-PLUS
DATA SHEET
PMC-951010
ISSUE 6
SONET/SDH TRIBUTARY UNIT PAYLOAD PROCESSOR / PERFORMANCE MONITOR
of the STS-1, AU3 or AU4 synchronous payload envelopes can be controlled
by the LOCK0 bit to immediately follow the C1 bytes or the H3 bytes.
In either floating or locked mode, the OTMF input is used to establish the
transmit tributary multiframe boundaries on the outgoing data stream OD[7:0].
OTMFH4:
The OTMFH4 bit selects the location of the OTMF in the tributary multiframe.
When OTMFH4 is set high, OTMF is pulsed high to mark the H4 byte which
indicates that the next AU3/4 or STS-1 frame is the first frame of the tributary
multiframe. When OTMFH4 is set low, OTMF marks the third byte after J1.
OOP:
The OOP bit controls the parity placed on the outgoing parity signal ODP.
When OOP is set low, the parity of outgoing data stream OD[7:0], together
with ODP is even. When OOP is set high, the parity is odd.
LV1EN:
The LV1EN bit controls the identification of the third byte after J1 in the V1
frame in locked mode (OJ1EN set low). When LV1EN is set low, the LC1J1V1
output only indicates the C1 and J1 bytes. The third byte after J1 is not
indicated. When LV1EN is set high, the LC1J1V1 output indicates the C1, J1
and the third byte after J1. LV1EN is ignored in floating mode (OJ1EN set
high).
POHPT:
The POHPT bit controls the data of the path overhead column on the
outgoing STS-1 (AU3, AU4) streams. When POHPT is set low, the outgoing
POH columns (except the H4 byte) are set to all-zeros. When POHPT is set
high, the POH column (except the H4 byte) of the incoming stream is
transferred to the outgoing stream. A two frame elastic store buffer is
provided to absorb phase variations between the incoming and outgoing
frames.
LOCK0:
The LOCK0 bit controls the payload offset of the outgoing data stream in
locked mode (OJ1EN set low). When LOCK0 is set high, the J1 byte in the
outgoing data stream is forced to the byte immediately following the H3 bytes
(pointer offset zero). When LOCK0 is set low, the J1 byte is force to the byte
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
70
PMC [ PMC-SIERRA, INC ]
