Incoming calls on line 8 do not forward to the system attendant like all the other lines do. Instead, it rings until the carrier's voicemail picks up.

Settings for Line 8 are identical in every way to other lines that behave as expected (except for trunk ID).

This line used to DIT to a specific extension, but several weeks ago, I changed this behavior to match all the other lines (DITs to a PhDN, which rings the front desk, and if no answer, goes to front desk voicemail).

I cannot confirm that this behavior existed prior to the change I made.

Any suggestions on what I might be missing? Seems like it should be fairly straightforward. The one thing I haven't tried is rebooting the system, but everything else is functioning normally, so it seems unnecessary.

Thanks for your suggestions