| Chinese | English |
| 活動訊號間隔時間 | heartbeat interval (The amount of time that can elapse before the Exchange server asks a mobile device running Exchange ActiveSync to connect again) |
| 複頻式訊號 | dual-tone multiple-frequency (The signaling system used in telephones with touchtone keypads, in which each digit is associated with two specific frequencies) |
| 複頻式訊號 | DTMF The signaling system used in telephones with touchtone keypads, in which each digit is associated with two specific frequencies (DTMF) |
| 音訊撥號 | audio call (A call for transmitting audio data, including but not limited to speech) |
