NEC PAGEPRO 1100 - Manual (Page 8)

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Foreword
This device must be used with shielded interface (Parallel) cable and
shielded network (10/100Base-T) cable.
The use of non-shielded cable is likely to result in interference with
radio communications and is prohibited under 89/336/EEC rules.
Ozone Release
During printer operation, a small quantity of ozone is released. This
amount is not large enough to harm anyone adversely. However, be
sure the room where the machine is being used has adequate ventila-
tion, especially if you are printing a high volume of materials, or if the
machine is being used continuously over a long period.