// Optical Networking
Social Selling
Sales
Optical Networking
B2B
LinkedIn
FLEXOPTIX
NOG
Peering Forum
Content Marketing
Trust
Relationship Building
Infrastructure
A vendor sent me a LinkedIn message last week. "Hi Rene, I noticed you're in the optical networking space. We have a solution that could transform your
Rene Fichtmueller
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2026-04-22
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~3 min read min read
400G
TCO
Optical Transceiver
Cost Analysis
MTTR
Spare Management
Compatible Optics
Network Operations
Procurement
Secondary Market
Optical Networking
Data Center
Supply Chain
Vendor Validation
Programmable Optics
Network Engineering
Optical components are often compared based on unit price. This does not reflect the total cost. The most cost-effective component is the one that integrates without requiring ongoing effort to keep it stable.
Rene Fichtmueller
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2026-04-17
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~2 min read min read
400G
Lab Testing
Optical Validation
MPO Connector
Fiber Optic
Insertion Loss
Polarity
Data Center
Connector Inspection
RFC 2544
Link Budget
Optical Networking
OTDR
TIA-568
IEC 61300
Network Deployment
Optical Power Budget
Lab validation confirms that a configuration can work under ideal conditions. It does not guarantee that it will behave the same way in production. Understanding that limitation is critical.
Rene Fichtmueller
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2026-04-16
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~2 min read min read
400G
PAM4
FEC
Forward Error Correction
KP4
Pre-FEC BER
Network Monitoring
Signal Integrity
Lane Diagnostics
Data Center Networking
NRZ
Optical Networking
oFEC
RS544
MPO Connector
Chromatic Dispersion
OSNR
An interface can be up while the link is already operating outside a stable margin. At 400G, a link being 'up' is not a useful indicator of health.
Rene Fichtmueller
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2026-04-15
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~3 min read min read
400G
Firmware
CMIS
QSFP-DD
EEPROM
DSP
Optical Transceiver
Troubleshooting
Network Engineering
State Machine
Optics Compatibility
DataPathActivated
Coherent Optics
Flexbox Programmer
Optical Networking
A system runs stable for months, then starts showing intermittent link resets after a routine update. Nothing is technically broken. The system behavior has changed.
Rene Fichtmueller
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2026-04-14
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~3 min read min read
400G
400ZR
400ZR+
Coherent Optics
QSFP-DD
OSFP
DWDM
Optical Networking
Data Center
Network Design
Supply Chain
Capacity Planning
Lead Time
DP-16QAM
Indium Phosphide
Optical Transceiver
ECMP
The design is complete. Procurement comes back: 400ZR+ optics are not available for four to five months. That is not a supply chain problem. It is a design assumption problem.
Rene Fichtmueller
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2026-04-13
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~3 min read min read
Optical Networking
800G
400G
Deployment
Data Center
Optical Transceiver
OSFP
QSFP-DD
PAM4
Network Design
TCO
Fiber Infrastructure
A $350 optic turned into an $18,000 problem. Not because the optic failed — because nobody cleaned the connector.
Rene Fichtmueller
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2026-04-05
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~1 min read min read