16 I ICT TODAY
Figure 11 shows a 4-fiber singlemode channel using a new high density CS connector interface. The CS
connector is a small push pull plug with two LC type ferrules. Its small size allows two CS connectors to fit
in a standard LC duplex footprint or into a QSFP-DD transceiver port. This option creates 2x100G channels
for OSFP transceivers and then breaks out to duplex LCs to QSFP28 transceivers at the server.
Based on its inclusion in the QSFP-DD MSA, the
Telecommunications Industry Association's (TIA's)
TR-42.13 subcommittee is working on TIA-604.19,
which will include a standard for this CS-type
connector in the near future.
CONCLUSION
When moving to 200 Gb/s, 400 Gb/s, and beyond, the
relationship of structured cabling to the transceivers
becomes even more integral to performance, and the
optics choices can no longer be considered outside the
context of the fiber cabling and connectivity used. When
upgrading a network with new switches and transceiver
technology, data center managers, ICT network designers,
and installers must consider distance requirements, multi-
mode or singlemode applications, infrastructure costs,
maintaining polarity among connector types, patching
locations, link loss budgets, and emerging standards.
Furthermore, they need to build flexibility into the design
to be able to support many emerging technology options.
It is important to work closely with infrastructure manu-
facturers who understand active equipment trends and
next-generation standard developments in order to create
the best possible strategy for migrating networks over
multiple generations of upgrades.
FIGURE 11: 200G to 2x100G breakout use case with 24-fiber singlemode channel configuration with 2x100-PSM4 transceiver.
AUTHOR BIOGRAPHY: Mike Connaughton, RCDD, CDCD,
is a senior product manager at Leviton Network Solutions.
Mike has over 30 years of experience in the ICT industry and
with optical fiber cable. He is responsible for strategic data
center account support and alliances at Leviton. He received
the Aegis Excellence Award from the U.S. Navy for his work
on the Fiber Optic Cable Steering Committee and was a key
member of the committee that developed the SMPTE 311M
standard for a hybrid fiber optic HD camera cable. Mike has
participated in fiber standardization committee meetings with
TIA, ICEA, ANSI, and IEEE. He is also a frequent presenter
at various BICSI conferences. Mike can be reached
at mike.connaughton@leviton.com.
REFERENCES:
1. "COVID-19 Boosts Cloud Service Spending by $1.5
Billion in the Third Quarter," Synergy Research Group,
5 December 2020.
2. In-house survey was conducted
by Leviton, November 2019.
MPO-LC Cassette MPO-LC Cassette CS-LC Patch Cord LC-LC Patch Cord Base24 MPO Trunk QSFP-DD/OSFP
400G
QSFP28 100G-
CWDM4
