Page 1321 - 5G Basics - Core Network Aspects

Transport aspects 2

3.1.1 Terms defined in [ITU-T G.870]

– completely standardized OTUCn (OTUCn)
– optical data unit (ODUCn)
– optical payload unit (OPUCn)
– optical transport network (OTN)

3.2 Terms defined in this Recommendation

This Recommendation defines the following terms:
3.2.1 FlexO frame: Consists of frame alignment (markers), OH, FEC and payload area.
3.2.2 FlexO lane: Refers to an electrical/optical lane of a FlexO interface, used to carry OTUC transport
signals.

3.2.3 FlexO interface: Refers to an individual interface that is part of a FlexO group. The acronym used
for FlexO interface is FOICx.k. The term Cx signifies the FlexO interface rate. The term k refers to the
number of lanes in the interface.
NOTE – The terms member and PHY are often used to refer to a FlexO interface.
3.2.4 FlexO group: Refers to the group of m * FlexO interfaces.

4 Abbreviations and acronyms

This Recommendation uses the following abbreviations and acronyms:
AM Alignment Marker

B100G Beyond 100G
BMP Bit-synchronous Mapping Procedure
CAUI (Chip to) 100 Gb/s Attachment Unit Interface

CM Common Marker
CRC Cyclic Redundancy Check

FA Frame Alignment
FAS Frame Alignment Signal

FCC FlexO Communications Channel
FEC Forward Error Correction

FlexE Flexible Ethernet
FlexO Flexible Optical Transport Network
FOIC FlexO Interface

GFP Generic Framing Procedure
GID Group Identification

IA Implementation Agreement
LSB Least Significant Bit
MAP PHY Map field

MFAS Multi-Frame Alignment Signal
MS Multiplexed Section

MSB Most Significant Bit

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