We made an MICS upgrade to a BCM400 4.0, we faced a problem where we were unable to detect or activate the actual door phone in place.
By contacting Nortel, we found out that the BST Doorphone nt8b79fa wasn't compatible with any of the BCM. So we bought the new one nt8b79fd and it's now working fine.
By contacting Nortel, we found out that the BST Doorphone nt8b79fa wasn't compatible with any of the BCM. So we bought the new one nt8b79fd and it's now working fine.