Hitachi ZAXIS 135US-5B Operator's Manual page 54

 Do not attempt to disassemble, repair, modify and displace
of the communication terminal, antenna and cables. Failure
to do so may cause damage or fire on the machine and the
communication terminal. (Before removing or installing the
communication terminal, consult your authorized Hitachi
dealer.)
 Do not pinch or forcibly pull cables, cords and connectors.
Failure to do so may cause damage or fire on the machine
and the communication terminal due to short/broken
circuit.
SAFETY
S-40