Vad60 thanks for pointing that out, it took me a few days to get around to it but I carefully checked Form 15, and 13.

UPDATE:
Bay 04 Slot 06 has AMI&ZCS for coding because it connects to another remote Mitel PBX offsite. (This answers one of my earlier questions.) Additionally, it is currently setup to T1 E&M.

Bay 02 Slot 06 and Bay 03 Slot 06 are both bonded under a T1 DID/LOOP-TIE only 6 channels allocated on the first T1, and 24 on the other. (30 total) (I assume the 6 channels T1 was added to support more calls.)

I apologize in advance for being a newbie but could you please explain why I need to change the T1 DID to E&M emulation? Do you think it’s possible for me to simply 'pretend' to be the Telco on my Asterisk server - and leave the settings alone?