Best TRouble shooting weould be to use a Seimons 4 conductor quick clip for the 66 block, plug into each station 9-16 at the backboard making sure that the Amp connector is properly seated. We run 2 screws into the plastic body pressing against the amp so it will never come off.) Then plug into the 8 jacks inside the Cabinet. The Quick Clip is a necessity for trouble shooting. Plugs right on to the 66 block. If phones are not working at the 66 block of exp module, check the wiring of the block and amp. Make sure that the station in question has outgoing access to the line 605-606 and that the buttttons are set right. To check button
PROGRAM 99, press button- display will show assignment. Concentrate on 1 ext at a time.
LAST RESORT= initialize switch, check for above problems and if fixed, reprogram.
