What is the Cisco A9K-40GE-B?
The Cisco A9K-40GE-B is a circuit card / line card, listed by the manufacturer as "40-Port GE Medium Queue Line Card". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
CircularTelecomParts Catalogue

Part Overview
The Cisco A9K-40GE-B is a circuit card / line card — originally specified as "40-Port GE Medium Queue Line Card" — available refurbished or as surplus stock via Circular Telecom, supporting network operators sourcing decommissioned and reclaimed equipment.
Common Questions
The Cisco A9K-40GE-B is a circuit card / line card, listed by the manufacturer as "40-Port GE Medium Queue Line Card". 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 A9K-40GE-B, subject to current availability. Contact Circular Telecom for a live quote.
Circular Telecom Catalogue