Instruction manual

Safety Warnings
The exclamation point within a triangle is intended to warn the operator or service
personnel of operation and maintenance factors relating to the product and its operating
environment which could pose a safety hazard.
Always observe standard safety precautions during installation, operation and maintenance of this product.
Only a qualified and authorized service personnel should carry out adjustment, maintenance or repairs to
this instrument. No adjustment, maintenance or repairs should be performed by either the operator or the
user.
Telecommunication Safety
The safety status of each of these ports on the DV-MUX3 is declared according to EN 41003 and is detailed
in the table below:
Safety Status Ports
SELV V.24, V.35, V.36, X.21, 530
TNV FXO, FXS, E&M
SELV = Safety Extra-Low Voltage
TNV = Telecommunications Network
In order to ensure the safety of the operator, the DV-MUX3 must be connected to a reliable
protective earth and the signal ground must be connected to the chassis ground at all times.
Additional conditions concerning safety:
• The FXO interface is suitable for direct connection to the PSTN, and does not rely
on the protective earth for safety. However, a mixed combination (e.g. FXO and
E&M together) does rely on the protective earth for safety.
• The FXS interface is intended for connection of a telephone set or similar
equipment and is not intended for a direct connection to the PSTN.
• The E&M interface is intended for direct connection to a PABX approved to
EN60950 and EN41003, but is not intended for direct connection to the PSTN