Option settings Page 109 of 906
Circuit Card Description and Installation
Ring ground switches

A set of four DIP switches selects which Ring lines are connected to ground

(see Table 19).

Table 19
Ring ground switch settings
Switch Description S2 switch setting
1 Trunk 0 Transmit off - Ring line is not grounded
on- Ring line is grounded
2 Trunk 0 Receive off - Ri ng line is not grounded
on - Ring line is grounded
3 Trunk 1 Transmit off - Ring line is not grounded
on - Ring line is grounded
4 Trunk 1 Receive off - Ri ng line is not grounded
on - Ring line is grounded