How to use 100 g-qsfp28-lr4 optical modules?

The easiest way to connect with the 100g- qsfp28 lr4 optical module with normal or standard transceivers and there is an extensive variety of wires and transceivers apposite for this.

Ethernet switch merchant wants to exploit the compactness of visual transceivers ports on their types of equipment to proffer a price optimized resolution for linking switches which is why vendors offer modest price per morsel traffic and highest count on channels.


Most of these switches merchants select the tiniest form factor transceiver i.e., QSFP28 transceivers. It is the nominal module accessible which has the lowest consumption of power from all that are competent of usage 100G traffic. These resources that switch merchant can augment the traffic by putting an issue 2.5 devoid of the requirement to revamp the frontage board of their switches. It is also prominent that the qsfp28 lr4 has the identical corporeal dimension as the QSFP+ frequently used for 40Gtraffic.


100 g-qsfp28-lr4 application guide

DAC active DAC passive LC Transceivers MM Transceivers AOC MM
0 to 15m 0 to 3 m 0 to 10km 0 to 100m 0 to 70m
Better performance and low cost Low distance and low cost Bestest performance but the costlier transceivers   Longer distance and higher cost than DAC
Cable assembly Cable assembly Non optical transceivers


separate transceivers and SM fiber and cables LC

prearranged connectors and LC cabling

Cable MPO and structured cabling and ribbon cables and separate transceivers Cable assembly optical transceivers
Rack to rack & inside rack Rack Inside Dc-Dc Rack-rack Rack-rack


This is great information for merchants of switches that required controlling data that stays within the data centre and the rack. The QSFP28 delivers a great fit because of these scenarios. When 100G traffic requires to be elated more than a particular distance of long path and it happens to a dilemma as to when it offers 100G connectivity to data centres between environmental places.

There are several factors available for the connectivity of a long-distance, for instance, CFP2 and CFP provides DWDM coherent technology and enables connectivity of distance more than 1000km of multi-channel excluding the CPF is huge as it’s too large to use in volume in an Ethernet switch. The power and size of the CFP4 or CFP2 are unnecessarily even if the merchant selects the smaller ones. The size and power of CFP4 or CFP2 are sometimes idealistically high and have a collision on the large value of the cost of the switches.