What is the Cisco GLC-ZX-SM?
The Cisco GLC-ZX-SM is a network/telecom equipment component, listed by the manufacturer as "EHTERNET SINGLE MODE LONG REACH". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
CircularTelecomParts Catalogue

Part Number
Part Overview
Cisco GLC-ZX-SM: a network/telecom equipment component (EHTERNET SINGLE MODE LONG REACH). Circular Telecom resells surplus and refurbished units of parts like this, helping operators extend network equipment lifecycles and reduce e-waste.
Common Questions
The Cisco GLC-ZX-SM is a network/telecom equipment component, listed by the manufacturer as "EHTERNET SINGLE MODE LONG REACH". 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-ZX-SM, subject to current availability. Contact Circular Telecom for a live quote.
Circular Telecom Catalogue