AT&T 518-600-016 manual Tie Line Jack Pin Identification G n a l Pin No

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

>If all the line are good, go on to step 25.

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

NOTE: For the following steps, refer to Table 4-1 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.

TABLE 4-1 Tie Line Jack Pin Identification

S i g n a l	Pin No.
T	5
R	4
T 1	1
R 1	2
E	3
M	6

18 Ensure that all phones are on-hook. Connect a volt meter between the M lead and ground at the 66-type connecting block for one of the bad tie lines.

>If the voltage is 0 volts, go to step 20.

>If the voltage is not 0 volts, go on to step 19

19Try the following steps one at a time:

a Reverse the E and M leads, then retest the condition.

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

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

Tie Line Troubleshooting 4-15