Warning:
• To avoid electric shock and/or damage to ports due to over-voltage phenomena,
you must connect the device to a reliable ground using the grounding termination
located on the device's rear panel.
• When the device is powered only from the 12V DC supply (utilizing the external
power adaptor), the device is not grounded!
• Ground the device prior to connecting the telephony port interfaces (FXO, FXS,
E1/T1 and BRI).
• When powering off the device, prior to disconnecting the ground cable at the rear
panel ((if required), remove all telephony interface cables.
To ground the device:
1. Connect an electrically earthed strap of 16 AWG wire (minimum) to the chassis'
grounding screw (located on the rear panel), using the supplied washer and fasten the
wire securely using a 6-32 UNC screw.
Figure 5-1: Grounding the Device
2. Connect the other end of the strap to a protective earthing. This should be in accordance
with the regulations enforced in the country of installation.
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