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13 Go off-hook on station B.
> If you hear dial tone, go
on
to step 14.
> If you do not hear
dial tone, go on to step 14
14 Dial station A.
> If the tie line does
not drop (within five seconds)
go on to step 15.
> If the tie line drops within five
step 17.
15 Listen for ringback tone.
> If you hear ringback tone, go on to step 16.
> If you do not hear ringback tone, go to step 17.
16 Pickup the handset at station A.
> If you are connected to station A, the tie line is
good. Goon to step 17.
> If you are not connected to station A, go
17.
17 Hang up. Repeat steps 8 and 9 for any other
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 to
step 18.
NOTE:
For the following steps, refer to Table 4-1 on
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.
4-20 Tie Line Troubleshooting