172
Installing the Avaya S8700 Media Server with an Avaya G650 Media Gateway
December 2003
Installing the coupled bonding conductor
The coupled bonding conductor (CBC) provides mutual inductance coupling between the CBC and the
telephone cables exposed to lightning. The CBC connects to the single-point ground block and runs
adjacent to pairs in an associated telecommunications cable. The mutual coupling between the bonding
conductor and the pairs reduces potential differences in terminating equipment.
The conductor consists of a 10 AWG (#25) (2.5 square millimeters) wire tie-wrapped to the inside wiring
cable and terminated at the CBC terminal bar at the main distribution frame (MDF). A minimum of 12
inches (30.48 centimeters) spacing must be maintained between the CBC and other power and ground
leads.
The 10 AWG (#25) (2.5 square millimeters) wire must be long enough to reach the telecommunications
cables at the rear of the media gateways, to follow these cables to the MDF, and to terminate at the CBC.
The conductor can be a 10 AWG (#25) (6 square millimeters) wire tie wrapped to the exposed cables, a
metal cable shield around the exposed cables, or 6 spare pairs from the exposed cable.
Installing coupled bonding conductor wires
1
At the DC power cabinet, connect a 10 AWG (#25) (6 square millimeters) ground wire to the
Ground Discharge Bar. See
Figure 67, Typical power and ground for a DC power cabinet,
on page
173.
2
Route the 10 AWG (#25) (6 square millimeters) ground wire to the CBC ground terminal bar at
the MDF.
3
Tie wrap the ground wire to the inside wiring cable.
