What is the Sigma Elec ADA-21?
The Sigma Elec ADA-21 is an optical amplifier, listed by the manufacturer as "AUDIO DISTRIBUTION AMPLIFIER CARD". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
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Part Overview
ADA-21 overview
optical amplifierSigma Elec ADA-21: an optical amplifier (AUDIO DISTRIBUTION AMPLIFIER CARD). Circular Telecom resells surplus and refurbished units of parts like this, helping operators extend network equipment lifecycles and reduce e-waste.
Common Questions
Common questions about ADA-21
Is the Sigma Elec ADA-21 available refurbished or as surplus stock?
Circular Telecom sources and resells surplus and refurbished Sigma Elec network equipment, including parts such as the ADA-21, subject to current availability. Contact Circular Telecom for a live quote.
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