PM5366-PI datasheet(102/267 Pages) PMC

102 / 267 page

PRELIMINARY

PM5366 TEMAP-84

DATASHEET

PMC-2010672

ISSUE 1

HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER

AND M13 MULTIPLEXER

PROPRIETARY AND CONFIDENTIAL

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

Recommendation G.747 refinement. All three demultiplexed 2048 kbit/s streams

can be replaced with AIS on an individual basis.

9.19 E3 Framer

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:

• the Trail Trace bytes;

• the FERF bit and indicates an alarm when the FERF bit is a logic 1 for 3 or 5

consecutive frames. The FERF indication is removed when the FERF bit is a

logic 0 for 3 or 5 consecutive frames;

• the FEBE bit for accumulation in PMON;

• the Payload Type bits and buffers them so that they can be read by the

microprocessor;

• the Timing Marker bit and asserts the Timing Marker indication when the value of

the extracted bit has been in the same state for 3 or 5 consecutive frames;

• the Network Operator byte for processing by the HDLC receiver when the

RNETOP bit in the E3 Data Link Control register is logic 1;

PM5366-PI Datasheet(PDF) 102 Page - PMC-Sierra, Inc