Port type | | |
| | | Analogue customer interface |
Power induction and earth potential rise | Integrated services digital network (ISDN) basic-rate interface Remote power feeding circuits |
| |
| | ISDN primary-rate interface |
Power induction and earth potential rise | Remote power feeding circuits |
Dedicated power feed (a.c., d.c.) 专用电源（交流、直流） | | Optical network unit/termination power feed interface |
Power induction and earth potential rise |
| | |
Earth potential rise and neutral potential rise |
| | |
|
Shielded cable (including coaxial cable) 屏蔽电缆（包括同轴电缆） | |
|
d.c. power interface 直流电 电源接口 | | |
