You need to go back and re-write your remarks in a way that we can trouble-shoot logically.

"I get no light nor signal" means...what? What kind of "signal"? Did you mean "I get no light or DIAL TONE" ?

"Audible ringing signal" Is there any other kind?

Are you using a common audible wiring arrangement?

How many telephones do you have connected?

Do you hear dial tone at the 5T and 5R terminals in the KSU?

If you pop the cover of a phone, do you hear dial tone at the 5T and 5R terminals on the key?

"except when I select the line key and ring it I get a audible ringing signal."

How do you mean "select the line key and ring it"?

Now, as to lamps, can you ground the A lead for line 5 at the KSU and hear the relay in the line card operating? Does a test lamp connected right at the 5LG and 5L terminals light when you do this?


Arthur P. Bloom
"30 years of faithful service...15 years on hold"