AASTRA DT4x2 for MX-ONE User Guide EN - Manual (Page 9)

9 DT412/DT422/DT432
Important User Information
SIM card
Your phone has a removable SIM card (Subscriber Identity Module)
to store your settings. This means that you can move your SIM
card from one phone to another and keep all your settings.
Safety information
The DT412, DT422 and DT432 phones are IP64 classified, which
means that they are robust, dust- and waterproof, designed for
people working in tough environments.
Intrinsic safety (DT432)
The DT432 phone is approved according to the ATEX directive to
be used in potentially explosive gas and dust environments.
Compliance with the Essential Health and Safety Requirements,
with the exception of those listed in the schedule to this certificate,
has been assured by compliance with the following documents:
EN 50014:1997 plus amendments A1 and A2
EN 50020:2002
IEC 61241-0:2004 plus Corrigendum 1
IEC 61241-11:2005
IEC 60529:1989
The classification and marking on the product is “II 2G EEx ib IIC
T4” for gas and “II 3D Ex ibD 22 IP64 T50°C” for dust.