PM5366-PI PMC-Sierra, Inc., PM5366-PI Datasheet - Page 102
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PM5366-PI
Manufacturer Part Number
PM5366-PI
Description
HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER AND M13 MULTIPLEXER
Manufacturer
PMC-Sierra, Inc.
Datasheet
1.PM5366-PI.pdf
(267 pages)
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PRELIMINARY
DATASHEET
PMC-2010672
9.19 E3 Framer
PROPRIETARY AND CONFIDENTIAL
• the Trail Trace bytes;
• the FERF bit and indicates an alarm when the FERF bit is a logic 1 for 3 or 5
• the FEBE bit for accumulation in PMON;
• the Payload Type bits and buffers them so that they can be read by the
• the Timing Marker bit and asserts the Timing Marker indication when the value of
• the Network Operator byte for processing by the HDLC receiver when the
Tributary payload loopback can be activated or deactivated under software
control. Although no remote loopback request has been defined for G.747,
inversion of the one of the C-bits, as selected by the Loopback Code Select
Register, triggers a loopback request detection indication in anticipation of
Recommendation G.747 refinement. All three demultiplexed 2048 kbit/s streams
can be replaced with AIS on an individual basis.
Three instances of the E3 Framer are independently programmed to frame to
34368 kbit/s frame formats. From each, the framed data is presented on
RDATO[x] or mapped into the SBI bus.
The E3-FRMR searches for frame alignment in the incoming serial stream based
on either the G.751 or G.832 formats. For the G.751 format, the E3-FRMR
expects to see the selected framing pattern error-free for three consecutive
frames before declaring frame alignment. For the G.832 format, the E3-FRMR
expects to see the selected framing pattern error-free for two consecutive frames
before declaring frame alignment. Once the frame alignment is established, the
incoming data is continuously monitored for framing bit errors and byte
interleaved parity errors (in G.832 format).
While in-frame, the E3-FRMR also extracts various overhead bytes and
processes them according to the framing format selected:
In G.832 E3 format, the E3-FRMR extracts:
consecutive frames. The FERF indication is removed when the FERF bit is a
logic 0 for 3 or 5 consecutive frames;
microprocessor;
the extracted bit has been in the same state for 3 or 5 consecutive frames;
RNETOP bit in the E3 Data Link Control register is logic 1;
ISSUE 1
90
HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER
AND M13 MULTIPLEXER
PM5366 TEMAP-84
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