PM5366-PI PMC-Sierra, Inc., PM5366-PI Datasheet - Page 37
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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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PROPRIETARY AND CONFIDENTIAL
parity errors, and far end block errors are accumulated. Error accumulation
continues even while the off-line framers are indicating OOF. The counters are
intended to be polled once per second, and are sized so as not to saturate at a
10
the microprocessor interface.
In the DS3 transmit direction, the TEMAP-84 inserts DS3 framing, X and P bits.
When enabled for C-bit parity operation, bit-oriented code transmitters and
HDLC transmitters are provided for insertion of the FEAC channels and the Path
Maintenance Data Links into the appropriate overhead bits. Alarm Indication
Signals, Far End Receive Failure and idle signal can be inserted using either
internal registers or can be configured for automatic insertion upon received
errors. When M23 operation is selected, the C-bit Parity ID bit (the first C-bit of
the first M sub-frame) is forced to toggle so that downstream equipment will not
confuse an M23-formatted stream with stuck-at-1 C-bits for C-bit Parity
application. Transmit timing is from an external reference or from the receive
direction clock.
The TEMAP-84 also supports diagnostic options which allow it to insert, when
appropriate for the transmit framing format, parity or path parity errors, F-bit
framing errors, M-bit framing errors, invalid X or P-bits, line code violations,
all-zeros, AIS, Remote Alarm Indications, and Remote End Alarms. A Pseudo
Random Binary Sequence (PRBS) can be inserted into a DS3 payload and
checked in the receive DS3 payload for bit errors. A fixed 100100… pattern is
available for insertion directly into the B3ZS encoder for proper pulse mask
shape verification.
The TEMAP-84 may be used as an E3 framer for the transport of framed but
unchannelized E3 data streams complying to the ITU-T Recommendations
G.751 or G.832. The line interface may be configured as either unipolar or
HDB3-encoded.
When configured in DS3 multiplexer mode, seven 6312 kbit/s data streams are
demultiplexed and multiplexed into and out of each DS3 signal. Bit stuffing and
rate adaptation is performed. The C-bits are set appropriately, with the option of
inserting DS2 loopback requests. Interrupts can be generated upon detection of
loopback requests in the received DS3. AIS may be inserted in the any of the
6312 kbit/s tributaries in both the multiplex and demultiplex directions. C-bit
parity is supported by sourcing a 6.3062723 MHz clock, which corresponds to a
stuffing ratio of 100%.
Framing to the demultiplexed 6312 kbit/s data streams supports DS2 (ANSI
TI.107) frame formats. The maximum average reframe time is 7ms for DS2. Far
end receive failure is detected and M-bit and F-bit errors are accumulated. The
DS2 framer is an off-line framer, indicating both OOF and COFA events. Error
-3
bit error rate. Transfer of count values to holding registers is initiated through
ISSUE 1
25
HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER
AND M13 MULTIPLEXER
PM5366 TEMAP-84
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