OEM Warranties

Will using Datanet Assets optics void my OEM warranty? No, and anyone (a manufacturer, distributor, or reseller) who claims they do is contradicting the law.


The most common hesitation we receive from people who have not bought compatible optical transceivers before is that they are afraid their OEM warranty will be voided if they implement compatible equipment in their network. While OEM warranties do not cover compatible optics, the Magnuson-Moss Warranty Act prohibits OEMs from revoking warranty support on their equipment due to the use of compatible optics.


The Magnuson–Moss Warranty Act is a United States federal law that was enacted in 1975 and it governs warranties on consumer products. The law was created to fix problems as a result of manufacturers using disclaimers on warranties in an unfair or misleading manner.


They are specifically prohibited in the consumer market by section 102(c) of the Magnuson-Moss Warranty Act of 1975 (15 United States Code section 2302(c)). In the networking equipment and server markets, such behavior can violate sections 1 and 2 of the Sherman Antitrust Act (15 United States Code sections 1 and 2). As the United States Supreme Court has stated:


“The essential characteristic of an invalid tying arrangement lies in the seller’s exploitation of its control over the tying product [here, the computer system] to force the buyer into the purchase of a tied product [here, the transceivers module sold by the system manufacturer] that the buyer either did not want at all, or might have preferred to purchase elsewhere on different terms. When such “forcing” is present, competition on the merits in the market for the [transceivers module] is restrained and the Sherman Act is violated.” Jefferson Parish Hospital District No. 2 v. Hyde, 466 U.S. 2 (1984).


These types of techniques are intended to intimidate and put pressure on purchasers into spending substantially more than they should for optical transceivers.


Cisco refers to the above law and the implications on their own website:


“When a product fault or defect occurs in the network, and Cisco concludes that the fault or defect is not attributable to the use of third-party memory, cables, GBICs, filters, or other non-Cisco components installed by a customer or reseller, Cisco will continue to provide support for the affected product under warranty or covered by a Cisco support program.”*



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