What is the Cisco 12DS3-SMB-B?
The Cisco 12DS3-SMB-B is a circuit card / line card, listed by the manufacturer as "12 PORT DS3 LINE CARD". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
CircularTelecomParts Catalogue

Part Overview
Manufactured by Cisco, the 12DS3-SMB-B (12 PORT DS3 LINE CARD) is a circuit card / line card. 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 12DS3-SMB-B is a circuit card / line card, listed by the manufacturer as "12 PORT DS3 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 12DS3-SMB-B, subject to current availability. Contact Circular Telecom for a live quote.
Circular Telecom Catalogue