On a hot summer’s day, it’s not unusual for hot weather to bother you, and that is certainly the case for networking too. Recent UK heatwaves have pushed facilities closer to their thermal limits, reminding operators that cooling systems are not the only components under pressure. As temperatures rise, cooling systems must work harder as the equipment inside a rack gets hotter, and it only takes a few extra degrees for a healthy network link to start showing problems.
Heat Doesn't Cause Faults, But Reveals Them
The room temperature is not the same as the temperature of the transceiver: inside a busy switch, optics sit beside powerful application-specific integrated circuits (ASICs) and other modules that all produce heat. Poor airflow, tightly packed cables and hot air circulating through the chassis can make the optic much hotter than the room around it.
Heat alone does not create faults. Instead, it exposes weaknesses that were already there, such as low optical power, dirty fiber connectors, ageing components or poor cooling. Elevated temperatures can also accelerate connector wear, increase insertion loss and reduce the performance margin available on older fiber infrastructure. These effects are becoming even more significant since modern 100G, 200G and 400G platforms now pack more optics into less rack space, increasing the thermal load around every transceiver.
Every watt a transceiver uses becomes heat that the system must remove, so the host and the optic should always be considered as one thermal system.
Designed for Tougher Conditions
To overcome these challenges, network operators should choose lower-power optics, as they not only reduce electricity consumption but also the amount of heat the cooling system must remove, improving the thermal budget of the entire rack.
For these exact situations, AddOn Networks supplies Extended-Temperature (E-Temp) and Industrial-Temperature (I-Temp) transceivers. Depending on the product, Extended-Temperature rated from -5°C to +85°C optics support those higher operating temperatures than Commercial-Temperature (C-Temp) optics, while many I-Temp models are rated from -40°C to +85°C case temperature for more extreme conditions.
This makes these transceivers well suited for telecom cabinets, mobile networks, edge locations and high-density data centers where hotspots are common.
More Than Just a Temperature Rating
However, a wider temperature rating is only useful if the optic also works reliably in the host system. To this end, AddOn Networks transceivers are host-coded and validated in real applications, giving operators confidence that they will perform under demanding conditions. Wider-temperature models also support Digital Optical Monitoring (DOM), allowing engineers to check temperature, voltage, laser bias current and transmit/receive optical power before small issues become major outages.
When the weather cools down, a struggling link may recover, but the lost performance margin does not magically return. Combined with proactive monitoring, interoperability testing and thermally resilient optics, organizations can maintain valuable operating margin even when summer temperatures are working against them. AddOn Networks’ E-Temp and I-Temp transceivers provide a reliable, vendor-neutral solution that helps protect network performance when the heat is on.
Keep your network performing when temperatures rise. Explore AddOn's temperature-rated optics.