AudioCodes Mediant 1000B - 5 Cabling the Device; Earth Grounding and Power Surge Protection

Hardware Installation Manual 5. Cabling the Device
Media Gateways & SBCs 39 Mediant 1000B Gateway & E-SBC
5 Cabling the Device
This section describes how to cable the device.
5.1 Earth Grounding and Power Surge Protection
Connecting the device to earth ground is required.
Protective Earthing
The equipment is classified as Class I EN 60950 and UL 60950 and must be earthed at
all times (using an equipment-earthing conductor).
• Finland: "Laite on liltettava suojamaadoituskoskettimilla varustettuun pistorasiaan."
• Norway: "Apparatet rna tilkoples jordet stikkontakt."
• Sweden: "Apparaten skall anslutas till jordat uttag."
Grounding and Power Surge Protection
• The device must be installed only in telecommunication sites / centers in compliance
with ETS 300-253 requirements "Earthing and Bonding of Telecommunication
Equipment in Telecommunication Centers".
• Prior to installation, earth loop impedance test must be performed by a certified
electrician to ensure grounding suitability at the power outlet intended to feed the unit.
It is essential that the impedance will be kept below 0.5 ohms!
• Proper grounding is crucial to ensure the effectiveness of the lightning protection,
connect the device permanently to ground (as described in the procedure below). The
device's grounding screw must be connected to the equipotential grounding bus bar
located in the Telecommunication rack or installation site, using a wire of 6 mm
2
surface wire. If the device is installed in a rack with other equipment, the rack must be
connected to the equipotential grounding bus bar of the Telecommunication room,
using a stranded cable with surface area of 25 mm
2
. The length of this cable must be
as short as possible (no longer than 3 meters).
• The device does not include primary telecom protection! When the FXO and FXS
telephone lines are routed outside the building, additional protection using a 350V
three-electrode Gas Discharge Tube (GDT) must be provided at the entry point of the
telecom wires into the building (usually on the main distribution frame / MDF), in
conjunction with proper grounding. The center pin of the GDT (MDF grounding bar)
must be connected to the equipotential grounding bus bar of the Telecommunication
room.
• Failing to install primary surge protectors and failing to comply with the grounding
instructions or any other installation instructions, may cause permanent damage to
the device!
• As most of the installation is the responsibility of the customer, AudioCodes can
assume responsibility for damage only if the customer can establish that the device
does not comply with the standards specified above (and the device is within the
hardware warranty period).
• The device complies with protection levels as required by EN 55024/EN 300386.
Higher levels of surges may cause damage to the device.
• To protect against electrical shock and fire, use a minimum of 26-AWG wire size to
connect the FXO and FXS ports.