ETSI ONT safety guidelines
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7368 ISAM ONT G-240W-G Product Guide
3FE-47555-AAAA-TCZZA Issue: 01
 
During operation in the supported temperature range, condensation inside the ONT 
caused by humidity is not an issue. To avoid condensation caused by rapid changes 
in temperature and humidity, Nokia recommends:
• The door of the ONT not be opened until temperature inside and outside the 
enclosure has stabilized.
• If the door of the ONT must be opened after a rapid change in temperature or 
humidity, use a dry cloth to wipe down the metal interior to prevent the risk of 
condensation.
• When high humidity is present, installation of a cover or tent over the ONT helps 
prevent condensation when the door is opened.
Release 05.08.01a | August 2018 | Edition 01