Neutral Tandem was an independent tandem switching service provider founded in 2001 and headquartered in Chicago, Illinois. The company provided interconnection services for wireless, VoIP, and local exchange carriers, operating on the principle that an independent party should own and operate tandem networks. Neutral Tandem went public on NASDAQ under the ticker TNDM and later rebranded as Inteliquent before being acquired by Sinch in 2021.
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