Kyocera Printserver Installation Manual page 193

Description of Variables
a value greater than zero, another attempt will be made to send the
data to the printer via FTP. After every attempt, the loop counter
will be decremented and the waiting period will be doubled. This
will be repeated until the data have been able to be printed or
MAXR has reached a value of '0,' and the shell script has come to
an end. When MAXR has been initialized with a value of '-1,' the
shell script will come to an end only if the data have been able to
be printed.
Print Server Installation Manual A-5