An AT&T engineer gave me these acronyms regarding fire alarm circuits at one of our new locations. He will not give me any explanation about what they are; except that CSNC will only work on copper, while PMNC will work on copper or fiber. Does anyone have any idea what these are? Our AT&T sales rep had no idea how to order these, and as usual the job site needs a couple installed yesterday.
Regards,
Bucky


Denzil "Bucky" Buckle, RCDD
1 Cabela Drive
Sidney, NE, 69160