What is the Tellabs CM3503-R6?
The Tellabs CM3503-R6 is a cooling fan module, listed by the manufacturer as "FAN MODULE, F, PKGD". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
CircularTelecomParts Catalogue

Part Overview
Tellabs CM3503-R6: a cooling fan module (FAN MODULE, F, PKGD). Circular Telecom resells surplus and refurbished units of parts like this, helping operators extend network equipment lifecycles and reduce e-waste.
Common Questions
The Tellabs CM3503-R6 is a cooling fan module, listed by the manufacturer as "FAN MODULE, F, PKGD". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
Circular Telecom sources and resells surplus and refurbished Tellabs network equipment, including parts such as the CM3503-R6, subject to current availability. Contact Circular Telecom for a live quote.
Circular Telecom Catalogue