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These days the progress momentum of fiber optic modules is incessant; among that, the 100 Gigabit fiber optic modules occupy the maximum market share like QSFP28 and 100 Gigabit CFP. Then QSFP28 versus 100 Gigabit CFP, how can we differentiate them? This writing will present a comprehensive introduction to QSFP28 and CFP with their particular applications.
QSFP28 VS 100 Gigabit CFP: How to Make a Choice?
For the dissimilarities between QSFP28 and 100 Gigabit CFP, we will describe power consumption, cost, definition, port density, and application.
QSFP28 VS CFP: Definition
CFP is an MSA agreement to describe the fiber optic transceiver’s form factor for excessive speed digital sign transmission. CSP's electrical link utilizes 10x10 Gigabit lanes in every direction (TX, RX). The fiber optic connection can support 4x25 Gigabytes per second and 10x10 Gigabytes per second adaptations of 100 Gigabytes per second. 100 Gigabit CFP optical modules provide connectivity choices for a broad range of transport service providers, data center networks, and enterprise aggregation implementations.
QSFP28 optical transceiver module combines four receive and transmits channels. "28" signifies that each lane consists of a 28 Gigabit data rate. Quad Small Form Factor 28 can do 25G x 4 breakout links or 100G x 1 link, relying on the optical transceiver. For example, we can use 100 Gigabit QSFP28 to four Small form-factor pluggable 28 DAC wires to understand the 25G x 4 breakout link. Moreover, based on LC interface, Quad Small Form Factor Pluggable 28 with an SMF (or QSFP28 based on MPO/MTP interface, with a twelve-fiber MPO/MTP patch cable) to attain 1 x 100 Gigabit link directly.
QSFP28 VS CFP: Power Consumption:
Power consumption plays a significant role in optical transceiver hardware resolution, considering network configuration, budget, and bandwidth potentialities. QSFP28 fiber optic module's power consumption is typically lesser than 3.5 watts, whereas the other 100 Gigabit fiber optic module's power consumption is 6 watts to 24 watts.
QSFP28 VS CFP: Port Density:
The dimensions of Quad Small Form Factor Pluggable 28 are the slightest 100 Gigabit optical transceiver on sale. CFP4 is the range of CFP's first generation. It is nearly 66% bigger than Quad Small Form Factor Pluggable 28 in packaging setup. The size difference signifies that Quad Small Form Factor Pluggable 28 is more effective in port usage.
QSFP28 VS CFP: Cost
Regarding port density and power consumption, the use of QSFP28 will be cost-effective. Moreover, CFP is more costly than QSFP28.
QSFP28 VS CFP: Application
CFP, a recommended 100 Gigabit fiber optic module, mainly applies in long-range transmission (usually over kilometers) and metro networks.
As we have given in the picture below, to attain long-range transmission and excessive cabling density with CFP optical transceiver, the construction mixed a sixteen-channel dual optical fiber DWDM multiplexer/de-multiplexer. It included MTP harness wires and an OEO+WDM SFP converter to transmit the standard SR wavelength into DWDM wavelengths. So, we achieve a long-range network of DWDM with 100 Gigabit CFP modules.
We have various QSFP28 products for sale, which we mainly divide into these four implementations in accord with the transmission range:
- Copper DAC, we use in Racks within 5 meters. QSFP28 Direct Attach Cables are perfect for utilizing limited-range links within 5 meters. They can provide an ideal wire assembly in a low-cost manner.
- QSFP28 CLR4/CWDM/PSM4 optical transceiver for 100 meters-2 kilometers. For 100 meters to 2 kilometers, QSFP28 CLR4/CWDM4/PSM4 optical transceivers can provide low-cost solutions. They can support 500 meters above twelve-optical fiber MTP SMF and 2 kilometers above duplex LC SMF.
- QSFP28 ZR4/ER4/LR4 optical Transceiver for an extended span. For extended span 100 Gigabit Ethernet deployment, like the integration between two constructions (primarily to 10 kilometers), QSFP28-100 Gigabit-LR4 with LC duplex SMF is the favorite option that IEEE has defined. For extensive ranges (above 40 kilometers and 80 kilometers), 100 Gigabit QSFP28 ZR4/ER4 optical transceivers are perfect.
- Concerning QSFP28 versus 100 Gigabit CFP, which to utilize to construct your network? CFP modules possess a more significant size compared with QSFP28 optical modules. 100 Gigabit QSFP28 comes out as the mainstream, and we mostly use it in shorter ranges (0-10 kilometers) between switches and sometimes in extensive distances (above 40/80 kilometers) with QSFP28 ZR4/ER4. While we can also use 100 Gigabit CFP in short ranges, it is most common in MANs (metropolitan area networks) and long-distance WDM transmissions. It rests on two primary aspects: the application scenario and the port kind of our hardware device.
