What is the Tellabs 81.SDF48SR1851M?
The Tellabs 81.SDF48SR1851M is a SFP optical transceiver module, listed by the manufacturer as "SDF-48 SR TRCVR SFP". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
CircularTelecomParts Catalogue

Part Number
Part Overview
Tellabs 81.SDF48SR1851M: a SFP optical transceiver module (SDF-48 SR TRCVR SFP). 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 81.SDF48SR1851M is a SFP optical transceiver module, listed by the manufacturer as "SDF-48 SR TRCVR SFP". 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 81.SDF48SR1851M, subject to current availability. Contact Circular Telecom for a live quote.
Circular Telecom Catalogue