The heat load of modern telecom cabinets is often high, and it's usually necessary to install enclosure cooling equipment to maintain the internal temperature below the higher limit specified by GR-3108-CORE. Enclosure heating may also be required in colder regions.
Although the most rugged types of telecom equipment can operate without heating and cooling, most outdoor telecom cabinets are designed to comply with the GR-3108-CORE Class 1 specification, which requires that the internal temperature of the cabinet is maintained between 41°F (5°C) and 104°F (40°C).
ASHRAE, the Association of Heating, Refrigeration and Air-Conditioning Engineers, investigated this and established that for telecommunication equipment, the service life at 113°F (45°C) is reduced by a factor of 1.8 compared with the service life at 68°F (20°C).
In order to meet the growth in demand for digital services, telecom companies are faced with the need to install significant numbers of OSP telecommunication cabinets that are often well away from existing infrastructure.
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