answering machine; voicemail
Abbreviation of 留守番電話. Refers to the device or the voicemail system itself.
See also: 留守番電話
I left a message on your answering machine.
If I can't answer the phone, it will switch to voicemail.
Abbreviation of 留守番電話 (るすばんでんわ), literally 'absence-duty telephone'.