Цитата:
The CAT commands are Kenwood CAT based. Therefore the Error Codes are as follows:
■ Error Messages
In addition to the Answer command, the transceiver can send the error messages listed below
Error
Message Reason for Error
?;
•Command syntax was incorrect.
•Command was not executed due to
the current status of the transceiver
(even though the command syntax
was correct).
Note: Occasionally, this message may not
appear due to microprocessor transients in
the transceiver.
E;
A communication error occurred, such
as an overrun or framing error during a
serial data transmission.
O;
Receive data was sent but processing
was not completed.
так что ответ в виде ;? при отключённом ГПД В - верный