AT&T 518-600-016 manual If the condition has not been corrected, go on to c

17Hang up. Repeat steps 8 and 9 for any other ports being tested.

>If all tie lines are good, go on to step 25.

>If one or more of the tie lines are not good, go m step 18.

NOTE: For the following steps, refer to Table 4-1on page 4-15 to identify the pin numbers of the tie line jack associated with the leads identified in the steps. Use the green ground wire on the power supply or a pipe ground.

18Ensure that all phones are on-hook. Connect a volt meter between the T lead, pin number 5 on the tie line jack, and ground at the 66-type connecting block for one of the bad tie lines.

>If the voltage is 48 volts, go to step 20.

>If the voltage is not 48 volts, go on to step 19.

19Try the following steps one at a time:

aReverse the T,R pair and the T1 ,Rl pair, then retest the condition.

>If the condition has been corrected, go back to step 8.

>If the condition has not been connected, go on to step 19b.

bTry another tie line port, then retest the condition.

>If the condition has been connected, the original tie line port is faulty. Go back to step 8.

>If the condition has not been corrected, go on to step 19c.

Tie Line Troubleshooting 4-27