What is the Cisco GLC-BX40-U-I?
The Cisco GLC-BX40-U-I is a SFP optical transceiver module, listed by the manufacturer as "1000BASE-BX40 SFP, 1310NM". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
CircularTelecomParts Catalogue

Part Overview
Manufactured by Cisco, the GLC-BX40-U-I (1000BASE-BX40 SFP, 1310NM) is a SFP optical transceiver module. Circular Telecom sources, tests, and resells surplus and refurbished Cisco equipment like this as part of a lower-carbon alternative to new procurement.
Common Questions
The Cisco GLC-BX40-U-I is a SFP optical transceiver module, listed by the manufacturer as "1000BASE-BX40 SFP, 1310NM". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
Circular Telecom sources and resells surplus and refurbished Cisco network equipment, including parts such as the GLC-BX40-U-I, subject to current availability. Contact Circular Telecom for a live quote.
Circular Telecom Catalogue