@Alvaphonepro - I would assume RCOU/OS 2 or 3, which shouldn't matter if they had analog lines before.
First, verify that they ported the correct lines to the corresponding tags on their block.
Second, verify that they didn't have call forwarding turned on, from their old service, to a different line on their new service... I had that happen just about three weeks ago.
I had a customer with all the lines tagged, tested and labeled in their new office. Well, when I tested the incoming calls, they rang in order of what I assumed was the hunt (no paper-work of course). I connected them to the DK40i, tested the hunt group for incoming and tested outbound and left.
The following Monday (while I was on vacation), they called and reported ring no answer from customers and calls never coming into CO-1... yup, their provider forwarded the lines and once they canceled the RCF of their old main number, it threw a wrench in the whole thing. There was a dummy number set up for the main number, which was never passed on to us. Well they had RCF going to what was really CO-2 and when they turned it off, call number one was always ringing to a line not connected to anything. While that line was busy with call 1, call 2 rang CO-2, 3, 4 , etc.
AND
After that long winded story, thirdly... check ring voltage coming from the new provider on all the channels. Maybe they will ring a butt-set, but not enough RV for the CO card to activate.
