Image processor with communication units for processing different job types according to priority

An image processor comprising:

• a plurality of communication units, each of the communication units comprising:
• a priority job setting data obtaining unit that obtains priority job setting data, which sets types of priority jobs for each of the communication units, from a memory unit storing the priority job setting data;
• a priority job controlling unit that carries out control so that a type of job set to be given priority in the priority job setting data is processed in priority when a plurality of jobs involving communication processes through the communication units arise at overlapping timing, the priority job controlling unit being located internal to its respective communication unit for controlling the respective communication unit;
• and
• a job-linked address transmitting unit that when one of the communication units receives a type of a job from an external device, the job not being set to be given priority in the priority job setting data, transmits a communication address of another of the communication units to the external device, the another communication unit being set to give priority to the job in the priority job setting data, through the one of the communication units.