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Packet over SDH (POS)
Setting HDLC Framing, Scrambling and HDLC Frame Check Sequence
4 Set SCRAMBLING to
If you select
SONET using an x
Note that the Scrambling OFF/ON selection affects the value of the C2 Overhead
Byte as follows:
• Path Signal Label C2 set to 0x16 to indicate PPP when Scrambling set ON.
• Path Signal Label C2 set to 0xCF to indicate PPP when Scrambling set OFF.
5 Set the HDLC FCS (Frame Check Sequence) field to
as required. Note that
CRC-32 is usually the recommended selection.
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or
as required.
ON
OFF
then scrambling is performed during insertion into the
ON
43
+ 1 polynomial.
is not available for VC4-16c at 2.5Gb/s.
CRC-16
or
CRC-16
CRC-32
189
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