Tut Systems XL-12000S manual Appendix C Measure Line Length, Measuring Phone Wire

XL-12000S

MANAGED, HIGH-SPEED NETWORK MODEM USER GUIDE

Appendix C: Measure Line Length

Measuring Phone Wire

1.Use a cable scanner or an ohmmeter to measure the lengths of phone wire that will connect the modems. When using an ohmmeter, short-circuit one end of the phone wire and measure the resistance between the two wires at the other end.

Figure C.1 Using an ohmmeter to measure the length of phone wire.

600

Ohmmeter	Short Pair
	Together

OHMS

Punchdown	Punchdown
Block	Block

2.Multiply the resistance by 20 to find the length of the wire in feet. For example, 600 ohms would indicate a cable length of about 12,000 feet: 600 x 20 = 12,000 (+/-). This formula works for 24-gauge phone wire.

APPENDIX C: MEASURE LINE LENGTH TUT SYSTEMS 65