What is the Cisco CPAK-100G-ER4L?
The Cisco CPAK-100G-ER4L is an equipment module, listed by the manufacturer as "CPAK module, 100G for applications <25km". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
CircularTelecomParts Catalogue

Part Overview
The Cisco CPAK-100G-ER4L is an equipment module — originally specified as "CPAK module, 100G for applications <25km" — available refurbished or as surplus stock via Circular Telecom, supporting network operators sourcing decommissioned and reclaimed equipment.
Common Questions
The Cisco CPAK-100G-ER4L is an equipment module, listed by the manufacturer as "CPAK module, 100G for applications <25km". 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 CPAK-100G-ER4L, subject to current availability. Contact Circular Telecom for a live quote.
Circular Telecom Catalogue