Brother MFC990CW Service Manual page 151

Definition of Error Codes on the Communications List
(1) Calling
Code 1 Code 2
10
11
11
11
11
11
11
11
17
(2) Command reception
Code 1 Code 2
20
20
20
20
20
20
20
20
20
20
20
20
08 Wrong number called.
01 No dial tone detected before start of dialing.
02 Busy tone detected before dialing.
03 2nd dial tone not detected.
05 No loop current detected.*
06 Busy tone detected after dialing or called.
07 No response from the remote station in sending.
10 Unobtainable tone detected after dialing.
07 No response from the calling station in receiving.
01 Unable to detect a flag field.
02 Carrier was OFF for 200 milliseconds or longer.
03 Abort detected ("1" in succession for 7 bits or more).
04 Overrun detected.
05 A frame for 3 seconds or more received.
06 CRC error in answerback.
07 Error command received.
08 Invalid command received.
09 Command ignored once for document setting or for dumping-
out at turn-around transmission.
0A T5 time-out error.
0B CRP received.
0C EOR and NULL received.
4-26
Causes
* Available in German models only.
Causes
Confidential