T1 CSU ACE, Provides customer facing DSX-1 via RJ48C connector, Interface T1 DTE equipment to Telco-provided or private T1 facility, Transparently passes signal format and line coding, T1 line conditioning and jitter tolerance per ANSI T1.403, T1.102, and AT & T TR 62411, Supports framed or unframed signal formats, Transmits unframed "all 1s" during signal loss from DTE or T1 network, Bantam test jacks, Front panel status LEDs