Circuitry for identifying the validity of received data words

摘要: A multi-stage modem status register, which has at least one stage is ordinarily unused, employed to receive operating condition signals from an associated modem. In addition bistable circuitry, exists as part of the control circuitry a transceiver, used: (1) provide first binary signal when data processor (with present system used), generates "resynchronization request" signal; and (2) second in response resynchronization being achieved. The connected above described unused enable or other be present. register regularly interrogated results are sent both memory comparison device. Output transmitted said device, time that subsequent interrogation Hence, they appear two different frames, compared. When changes its status, indicated by change state device provides output distinguish between probable invalid received words valid words.