Optical transceivers & cables

Transceivers & form factors

• Form factors: overview & comparison
• GBIC
• SFP
• SFP+
• SFP28
• SFP56
• SFP-DD
• XFP
• QSFP
• QSFP+
• QSFP28
• QSFP56
• QSFP112
• QSFP-DD
• OSFP
• Write-protection types & programming

Specifications & standards

• MSA & standards overview
• MSA specification catalog (SFF/INF)
• SFF-8472 — SFP diagnostics
• SFF-8636 — QSFP management
• SFF-8024 — code tables
• CMIS — common management
• MIS — SFP-DD management
• SFP family hardware specs (INF-8074, SFF-8431…)
• QSFP family hardware specs (SFF-8436, SFF-8665…)
• INF-8077i — XFP management (+ X2, XENPAK)
• Tunable DWDM memory maps: SFF-8690, SFF-TA-1004
• Rate & application selection: SFF-8079, SFF-8089

DDM/DOM diagnostics

• DDM basics

Common problems & solutions

• Problem map & diagnostic method
• Vendor lock & «unsupported transceiver»
• Third-party optics: reliability & economics
• DDM levels & thresholds in practice
• Link flapping, CRC & dirty connectors
• DAC vs AOC vs transceivers
• Failures, overheating & counterfeits
• EEPROM recoding: passwords & mechanics
• CMIS modules: QSFP-DD 400G/800G issues

Reference

• Glossary