If you’ve searched for any of these Finisar optical transceiver part numbers — FTLC9152RGPL, FTCD8613E1PCM, FTCD1323E1PCL, FTCD1333E1PCL, FTLC9558REUM, or FTCC8612E1PCM — you’ve probably landed on a distributor page with a price tag and a wall of unexplained specs. NextGen Networks helps businesses and network professionals compare these Finisar transceiver options based on speed, fiber type, distance, and connectivity requirements.
These six modules span 100G through 400G Ethernet, and the differences between them come down to a few practical questions: How much bandwidth do you need? How far does the link have to travel? And what fiber is already in your walls? Here’s a straight comparison, followed by guidance on choosing.
Quick Comparison
| Model | Speed | Fiber | Distance | Connector |
|---|---|---|---|---|
| FTLC9152RGPL | 100G QSFP28 | Duplex MMF (SWDM4) | 75–150m | Duplex LC |
| FTLC9558REUM | 100G QSFP28 | Parallel MMF (pigtail) | 70–100m | MPO-12 pigtail |
| FTCC8612E1PCM | 200G QSFP56 | Parallel MMF | 70–100m | MPO-12 |
| FTCD8613E1PCM | 400G QSFP-DD SR8 | Parallel MMF | 70–100m | MPO-16 APC |
| FTCD1333E1PCL | 400G QSFP-DD | Duplex SMF (LWDM) | 2km | Duplex LC |
| FTCD1323E1PCL | 400G QSFP-DD | Duplex SMF (LWDM) | 10km | Duplex LC |
The 100G Options: FTLC9152RGPL and FTLC9558REUM
Both modules deliver 103.1 Gb/s aggregate over four 25G lanes, but they solve different cabling problems.
FTLC9152RGPL uses SWDM4 (shortwave WDM) technology, which packs four wavelengths onto a standard duplex LC multimode connection — meaning you can run 100G over the same two-fiber cable plant that used to carry 10G. It’s the go-to choice when you’re upgrading an existing duplex MMF network without pulling new fiber.
FTLC9558REUM instead uses parallel MMF over a pigtailed MPO-12 connection rather than a removable front-panel receptacle. That fixed-fiber design makes it a better fit for sealed or liquid-immersion-cooled server environments, where a standard pluggable connector introduces reliability risk.
The 200G Step-Up: FTCC8612E1PCM
The FTCC8612E1PCM is a QSFP56 SR4 module running 212.5 Gb/s aggregate over four 50G PAM4 lanes on parallel multimode fiber via MPO-12. It’s the natural mid-tier choice for networks moving past 100G but not yet ready for full 400G — a common intermediate rung in leaf-spine fabrics that already have QSFP56 ports provisioned.
The 400G Family: FTCD8613E1PCM, FTCD1323E1PCL, FTCD1333E1PCL
All three are QSFP-DD modules rated at 425 Gb/s aggregate bit rate, but they target very different link distances and fiber types.
FTCD8613E1PCM is the short-reach, high-density option: 8-lane PAM4 over parallel multimode fiber via an MPO-16 APC connector, reaching 70–100m. It’s built for spine-to-leaf or server-to-fabric links inside a single data hall — the kind of dense, short-hop connections common in AI/HPC clusters.
FTCD1333E1PCL and FTCD1323E1PCL trade multimode density for single-mode reach. Both use 8-channel LWDM optics over duplex LC single-mode fiber, cutting fiber count dramatically compared to the SR8 module. The difference between them is distance: FTCD1333E1PCL is built for 2km links, while FTCD1323E1PCL extends to 10km — useful for connecting buildings across a campus or bridging data halls that sit farther apart than multimode optics can handle.
How to Choose Between Them
Start with speed. 100G narrows you to the FTLC9152RGPL or FTLC9558REUM. 200G means the FTCC8612E1PCM. 400G puts you in QSFP-DD territory with three options.
Then check your fiber plant. If you already have duplex LC cabling, the FTLC9152RGPL (100G) or the FTCD1323E1PCL/FTCD1333E1PCL (400G) will use it without a rebuild. If you’re running parallel MPO fiber — or building fresh — the FTLC9558REUM, FTCC8612E1PCM, and FTCD8613E1PCM are the parallel-fiber options.
Match distance to your topology. Don’t over-buy reach: the 2km FTCD1333E1PCL costs less optical margin (and usually less money) than the 10km FTCD1323E1PCL, so if your link is well under 2km, there’s no reason to pay for extra range you won’t use.
Confirm FEC support on your switch. Several of these modules — notably the FTLC9152RGPL and FTCD8613E1PCM — depend on RS-FEC or KP4 FEC to hit their maximum rated distance. Check your switch OS settings before assuming you’ll get full reach.
Where to Get Genuine Finisar Transceivers
NextGen Networks stocks genuine Finisar optical transceivers across the QSFP28, QSFP56, and QSFP-DD families, including all six modules covered here. If you’re not sure which part matches your switch platform and cable plant, our team can cross-check compatibility against your hardware compatibility list before you commit to an order.
Final Word
The FTLC9152RGPL, FTLC9558REUM, FTCC8612E1PCM, FTCD8613E1PCM, FTCD1323E1PCL, and FTCD1333E1PCL cover nearly every practical 100G–400G scenario a data center runs into — reusing existing duplex fiber, maximizing density on parallel multimode, or extending reach across a campus on single-mode. Match the module to your fiber plant and distance, not just the port on your switch, and the rest of the deployment falls into place.
