CHAPTER 5 Cabling the Device
Mediant 800 Gateway & E-SBC | Hardware Installation Manual
5
Cabling the Device
This chapter describes the cabling of the device.
Grounding and Surge Protection
The device must be connected to earth (grounded) using an equipment-earthing conductor.
Protective Earthing
The equipment is classified as Class I EN60950 and UL60950 and must be earthed at
all times.
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
mm2 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 mm2. 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 telephone
lines are routed outside the building, additional protection - usually a 350V three-
electrode Gas Discharge Tube (GDT) as described in ITU-T K.44 - 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 ports.
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