This voice modular connector, RJ-45 keystone jack, is Category 3 (CAT 3), 8-position 8-conductor (8P8C), and is designed for data and voice applications and is compliant with Category 3 requirements for connecting hardware as specified in ANSI/TIA/EIA-568-B.1. For use with applications: 10Base-T4, MB Token Ring, 100Base-T4, and 100VG-anyLAN