... framed N×64kbit/s channel error testing Bit error, coding error, frame error, CRC error and E bit error testing Signal loss alarm, AIS ... 215-1, 220-1, 223-1, and artificial code(7) Error code insertion: Bit error, Pattern slip, None single, Ratio 10-1~10- ... even check: odd, even, 1, 0, none(2.3) Error code insertion: None, single, or ratio 10-1~10-7.(3 ... : 5%~90%, non-condensing SAT-1CS E1 Datacom Tester