The new number ten green, copper, ground bonding conductor is connected to the ground terminal screw inside of the main telephone demarcation box for the house. I installed the new wire through the existing phone wire tube to avoid another hole in the wall.

One example of an Intersystem bonding termination as required by the National Electrical Code. This installation was for the electrical service on a storage shed.
Bad Grounding for Telephone, TV, and Power. The Telephone and Cable TV Demarcations were Grounded to an Old Pipe that was Stuck in the ground about 12".