This post seems to have got missed by us.
Presume resolved by now but just in case not:

Does reception know which line?
or any kind of info on the display besides CLID like Line XXX or >XXX etc?
or do these calls come in on an Intercom key?

"I.T. guy tried BCM Monitor but under lines he said it was blank"
What does that mean? the CLID is blank or there is no record of any call?

Suspect carrier but they need to provide way more info.




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