| Subject | English | Vietnamese |
| comp., MS | missed call notification | thông báo cuộc gọi bị lỡ (An e-mail message that is sent to a Unified Messaging subscriber that indicates that someone called but did not leave a message) |
| comp., MS | missed conversation | hội thoại bị nhỡ (An incoming conversation that was not acknowledged by the user. Missed conversation notifications are saved and reported to the user) |