Ether Ports > Electrical Lines Use the Electrical Lines tab to view the DS1 links created for the PDH. The following table describes Ether Ports > Electrical Lines subtab page fields and buttons. Item Description Port Displays the card port number. Port Name Displays the port name. Clock Source Displays the clock source. Line Type Displays the line type. Line Coding Displays the line coding. Line Length Displays the line length. Reset Refreshes the values. Help Displays context-sensitive help.