translate English to French: Competitors have typically been facilities-based service providers, who own a portion of their PSTN network facilities, or resellers of PSTN services, such as Centrex, purchased from either the incumbent carriers or other facilities-based competitors.
Normalement, les concurrents sont des fournisseurs de services dotés d'installations qui possèdent une partie de leurs installations de RTPC, ou des revendeurs de services RTPC, tels que Centrex, achetés des titulaires ou d'autres concurrents dotés d'installations.