Been a Broadcast Engineer for 20 yrs but still a newbie at this telco stuff, we (I) have been given the responsibility of maintaining this old PBX at the station and now have a problem with outgoing long distance. Local long distance is fine. Not sure what has changed but appears that I have one card (first outgoing long dist lines) that tries to seize, but does not GS the line. I can put my butt set accross the pair, then the PBX will get dial tone and dial. Where do I start to trouble shoot this??? I can butt set the line and GS just fine. But the PBX is having trouble on this card. Tried swapping out the GS line with a different line, but trouble stays with the card!??? Looks like all 4 lines on his card are doing the same thing. What has changed. Nobody has been working on this thing. Software? Looking for advice? Thanks, Ken.