Check the listing for details. Avaya DC Ring Generator Card NT6D42CDE5. Condition: New. Listed at 185.99 USD. The Avaya DC Ring Generator Card NT6D42CDE5 is a crucial component in phone switching systems and PBXs. This card is designed to generate ring signals for efficient and reliable telecommunication within office or business settings. Its specific model, NT6D42CDE5, ensures compatibility with Avaya systems and provides the necessary functionality to maintain smooth communication processes. This product is essential for businesses looking to streamline their telecom operations and improve overall communication efficiency.