What is the Cisco CSC-320?
The Cisco CSC-320 is a circuit card / line card, listed by the manufacturer as "CLOCK SYNCH CARD". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
CircularTelecomParts Catalogue

Part Overview
The CSC-320 is a circuit card / line card manufactured by Cisco. Listed by the manufacturer as "CLOCK SYNCH CARD", it is available through Circular Telecom's surplus and refurbished network equipment marketplace as a sustainable, tested alternative to buying new.
Common Questions
The Cisco CSC-320 is a circuit card / line card, listed by the manufacturer as "CLOCK SYNCH 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 CSC-320, subject to current availability. Contact Circular Telecom for a live quote.
Circular Telecom Catalogue