Is there a way to manually use the MW on/off code (519ext) to check the signalling/lamps? In my office ECS, if I attempt to dial 519ext, I get a busy. I thought the feature codes worked on any type of station (not just SLT). I can dial *ext and get a VM box, but can't dial 519ext to light a lamp.
If you configure an analog port as a voice mail port, you can use the MWL codes. A normal SLT/FAX port can't pass these codes.
Also, on your VMAC card Integration tab, be sure to change the trunk ID digits from 3 (ADIX) to 4 (ECS) and verify your mailbox ranges match your switch extension ranges for 3 or 4 digit mailboxes.