PLIDs only apply to prime lines, ONS ports and trunk ports.
Example PLID 5-1-1-2
1st number: Cabinet
2nd number: shelf
3rd number: card
4th number: circuit
You may also see a 5th number: sub circ.
You can stat a plid by typing: stat 5-1-1-2
As for RMATS - can also stand for Remote Maintenace And Testing Services.
That is actually my job title: RMATS Manager. I run our remote services center. Mitel, Nortel, Juniper, Telrad.
Ralph
So much pain. So little glory.