Why is an optical budget required?
Distance does not include connector, splice, MUX and system losses.
Long-Reach Optical Transmission
Long-Reach Optical Transmission and Link Budget Planning
Plan campus, data-center, metro and site-to-site SMF links using FR, LR, ER and WDM directions with optical link budget planning.
Delivery FAQ
Solution delivery questions
Is a long-reach module always safe on a short link?
No. A low-loss short link may risk receiver overload and require attenuation.
What should site acceptance record?
Record hosts, modules, loss, optical power, FEC, errors, alarms, temperature and duration.
Core Capabilities
Core solution capabilities
01
Optical budget
Calculate fiber, connector, splice and system margin.
02
Reach direction
Evaluate FR, LR, ER or WDM by the complete link conditions.
03
Lifecycle planning
Include temperature, spares, version control and equipment lifecycle.
Delivery Process
From requirements to delivery
1
Collect link conditions
Record reach, fiber, connection points, loss and both hosts.
2
Calculate and select
Match the ordered optical specification and preserve system margin.
3
Accept on site
Record optical power, FEC, errors, alarms and stability.
Recommended Products
Recommended product directions
100G and 200G Optical Transceivers → 100G and 200G Optical Transceivers covering 100G QSFP28 SR4, 100G QSFP28 PSM4, 100G QSFP28 DR1, 100G QSFP28 FR1, 100G QSFP28 CWDM4, 100G QSFP28 LR1 and related cable directions. Compare 100G and 200G optical transceivers, including 100G QSFP28 and 200G QSFP56 directions, without assuming the combined page is a permanent split point. 40G QSFP+ Transceivers → 40G QSFP+ Transceivers covering 40G QSFP+ SR4, 40G QSFP+ eSR4, 40G QSFP+ PSM4, 40G QSFP+ CWDM4 / IR4, 40G QSFP+ BiDi, 40G QSFP+ LR4 and related cable directions. Includes 40G optical transceivers, QSFP+ modules, cables and AOC/DAC directions for legacy network expansion.
Low-speed SFP Transceivers
1.25G SFP LX
Duplex LC 10km
10G SFP+ Transceivers
10G SFP+ LR
Duplex LC 10km
10G SFP+ Transceivers
10G SFP+ ER
Duplex LC 40km
10G SFP+ Transceivers
10G SFP+ BiDi
Simplex LC 10km / 20km / 40km / 80km
10G SFP+ Transceivers
10G SFP+ CWDM
Duplex LC 10km / 40km / 80km
10G SFP+ Transceivers
10G SFP+ DWDM
Duplex LC 40km / 80km
Application Scenarios
Applicable deployment scenarios
Data Center Interconnect
Data Center Interconnect
100G–800G Spine-Leaf
View application →Campus and Metro Optical Transport
Campus and Metro Optical Transport
FR / LR / ER and WDM links
View application →Access, Storage and Industrial Networks
Access, Storage and Industrial Networks
155M–25G / FC / BiDi / WDM
View application →Selection Guides
Technical guides for this solution
Optical link budget calculation
Separate loss, sensitivity, overload and design margin before selecting FR/LR/ER.
Read guide →400G DR4 vs FR4 vs LR4
Compare parallel-SMF and duplex-SMF options across 500m, 2km and 10km links.
Read guide →100G QSFP28 reach selection
Compare 100G SR4, PSM4, CWDM4 and LR4 before finalizing the long-reach direction.
Read guide →