Hello,
software version 10.1, type of voice mail is embedded it's not however on the same pbx all our voice mail are centrally located on one pbx, it's always the same caller, yes some may be just cell phones but she's narrowed it down to landlinds as well, if the call comes into the office and gets transferred to her there POTS line, if the call get transferred to her via our call center the lines it comes over the T1.
Thanks