We are using a freeswitch PBX. Any incoming voicemail getting left is being cut off after 60 seconds - i.e. the call is actually getting disconnected at that point. Regular calls are not, just voicemail.
I checked, and the vm-disk-quota parameter is not set, which according to https://wiki.freeswitch.org/wiki/Mod_voicemail#vm-disk-quota means that there is no limit. Is there anywhere else this cut off might be configured? I haven't seen anything at our SIP provider (voip.ms) to configure this, and any forum posts I've seen re: doing this at voip.ms seem to imply that it's not done there, it's just at the PBX level.