I am a computer tech at a small office. They have a KX-TDA100 and TVA50 that was installed before I started. There's about 13 extensions currently but only 4 are having issues.

They take 1+ minute to go to VM on no answer and/or busy (with one not going on busy). I've checked the time to VM from the phone itself and set it to 15 seconds on one, but it made no difference. The other extensions work without issue.

I've logged into the TVA50 system, but I've got no idea how to t/s this issue. The setting was 20 for Call Transfer No Answer Time under Dialing Parameters (I think that's the right spot).

Any ideas out there? My company expects me to fix the system.