AudioCodes Mediant 1000 Hardware Installation Manual page 50

CHAPTER 5 Cabling the Device
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Cabling specifications:
■ Cable: Straight-through RJ-11-to-RJ-11 telephone cable; 26-AWG minimum wire
■ Connector: RJ-11
Connector Pinouts:
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➢ To connect FXO interfaces for outdoor routing:
1. Ground the device as described in Section Earth Grounding and Power Surge Protection.
2. Connect one end of a straight-through RJ-11 cable to the RJ-11 port on the FXO module.
3. Connect the other end of the cable to your MDF.
4. Provide primary surge protection, by installing additional three-electrode Gas Discharge
Tube (GDT) rated 350V as a primary protection on the MDF, located at the entrance point
of telephone wiring to the building. The center pin of the GDT must be connected to
ground as shown in the following figure:
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 unit permanently to ground as per the illustration in this section.
The device accommodates only secondary surge protection. Where the FXO
lines are routed outside the building, it is essential to install additional three-
electrode Gas Discharge Tube (GDT) rated 350V as a primary protection on the
MDF, located at the entrance point of telephone wiring to the building. The center
pin of the GDT must be connected to ground as per the illustration in this section.
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 unit.
Figure 5-10: RJ-11 Connector Pinouts for FXO
Mediant 1000 Gateway & E-SBC | Hardware Installation Manual
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