A telecommunications equipment enclosure (10) that dissipates into the ambient environment heat internally generated by signal repeater cards and other electronic equipment stored therein, thereby prolonging equipment life and preventing premature failure due to damaging levels of retained heat. Equipment-receiving sleeves (20) are removably arranged concentrically about the interior of a cylindrical housing (12). The housing (12) is fitted with a lid (14) having a cylindrically protruding portion (48). Cooling fins (16) operable to conduct and dissipate heat are attached to the exterior of the housing (12). Each sleeve (20) is able to conduct heat away from the heat-generating equipment received therein, and to transfer the heat along two distinct thermally conductive pathways. Surge protection (60) is provided on a removable circuit board (62) located adjacent each sleeve (20) and replaceable without removing the sleeve (20) or otherwise disrupting functioning of the cards or other electronic equipment.