Brother International MFC 8500 Service Manual - Page 180

Selector No. 1 2 3 4 5 6 7 8 WSW09 (Protocol definition 1) Function Frame length selection Use of non-standard commands No. of retries T5 timer T1 timer Elapsed time for time-out control for no response from the called station in automatic sending mode Setting and Specifications 0: 256 octets 1: 64 octets 0: Allowed 1: Prohibited No. 3 4 00 01 10 11 : 4 times : 3 times : 2 times : 1 time 0: 300 sec. 1: 60 sec. 0: 35 sec. 1: 40 sec. No. 7 8 00 01 10 11 : 60 sec. (55 sec. for US and Canada) : 140 sec. : 90 sec. : 35 sec. NOTE: Selectors 1 through 6 are not applicable in those models which do not support ECM. Selector 1: Frame length selection Usually a single frame consists of 256 octets (1 octet = 8 bits). For communications lines with higher bit error rate, however, set selector 1 to "1" so that the facsimile equipment can divide a message into 64-octet frames. Remarks: The error correction mode (ECM) is a facsimile transmission manner in which the equipment divides a message into frames for transmission so that if any data error occurs on the transmission line, the equipment retransmits only those frames containing the error data. Selector 2: Use of non-standard commands If this selector is set to "0," the equipment may use non-standard commands (the machine's nativemode commands, e.g., NSF, NSC, and NSS) for communications. If it is set to "1," the equipment will use standard commands only. Selectors 3 and 4: No. of retries These selectors set the number of retries in each specified modem transmission speed. Selector 5: T5 timer This selector sets the time length for the T5 timer. Selector 6: T1 timer This selector sets the time length for the T1 timer. Selectors 7 and 8: Elapsed time for time-out control If the equipment receives no response (no G3 command) from the called terminal in automatic sending during the time set by these selectors, it disconnects the line. 13