What is the Tellabs 81.S2GFCSR1851M?
The Tellabs 81.S2GFCSR1851M is a SFP optical transceiver module, listed by the manufacturer as "2G SR SFP MOD". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
CircularTelecomParts Catalogue

Part Number
Part Overview
The 81.S2GFCSR1851M is a SFP optical transceiver module manufactured by Tellabs. Listed by the manufacturer as "2G SR SFP MOD", it is available through Circular Telecom's surplus and refurbished network equipment marketplace as a sustainable, tested alternative to buying new.
Common Questions
The Tellabs 81.S2GFCSR1851M is a SFP optical transceiver module, listed by the manufacturer as "2G SR SFP MOD". 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.S2GFCSR1851M, subject to current availability. Contact Circular Telecom for a live quote.
Circular Telecom Catalogue