The DS1N-14 card provides 14 Telcordia-compliant, GR-499 DS-1 ports. Each DS1N-14 port operates at 1.544 Mbps over a 100 ohm twisted-pair copper cable. The DS1N-14 card can function as a working or protect card in 1:1 or 1:N protection schemes. Each DS1N-14 port features DSX-level outputs supporting distances up to 655 feet depending on facility conditions.