Cisco Catalyst Digital Building Switches - Refurbished, Used, New

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This collection carries Cisco Catalyst Digital Building Series switches: the CDB-8P in new condition and in refurbished or used condition, and the CDB-8U in refurbished or used condition. Refurbished and used units are tested before they ship. These are small, fanless 8-port switches that Cisco built to connect building systems such as lighting, HVAC, security, sensors and audio-video equipment.

Model	Downlink ports	PoE per port	PoE budget	Uplinks	Shop
CDB-8P	8 x 10/100 Fast Ethernet	PoE+, 30 W	240 W	2 x 10/100/1000 copper	Shop
CDB-8U	8 x 10/100 Fast Ethernet	Cisco UPOE, 60 W	480 W	2 x 10/100/1000 copper	Shop
Related Cisco	Cisco Switches, Routers and Firewalls	See each page	See each page	See each page	See each page

Which Digital Building switch do I need?

The two models share the same size and port layout, so the choice comes down to how much power each endpoint draws. The CDB-8P delivers PoE+ at up to 30 W per port with a 240 W total budget. The CDB-8U delivers Cisco UPOE at up to 60 W per port with a 480 W budget, for higher-draw endpoints or when all eight ports need full power at once. Add up the rated draw of the devices on each switch and compare it with the budget.

Shared specifications

Fanless, semi-ruggedized design
Mounts in a rack, an electrical cabinet or in the ceiling
Internal autoranging AC power supply
Operating temperature -5°C to 50°C (23°F to 122°F) up to 5,000 ft
2.75 x 8.72 x 11.07 in (H x W x D), 9.65 lb

Are the uplinks fiber or copper?

Cisco lists two 10/100/1000 copper uplink ports on both the CDB-8P and the CDB-8U. Plan the uplink to the building's access switch over copper cabling.

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