... clock options (internal and picking-up);Technical Index(1) Signal input rate: 2048kbit/s ± 50ppm ... Balance terminating: 120Ω(5) Signal structure(5.1) Unframed structure(5.2) Framed structure: ... (6) Testing pattern: 26-1, 29-1, 211-1, 215-1, 220-1, 223-1, and artificial code(7) ... Error code insertion: Bit error, Pattern slip, None single, Ratio 10-1 ...