Unify OpenStage 40 T Dual-Tone Communication Device

Indicates whether the telephone or communication device includes an integrated answering machine that can record and store voice messages when the user is unavailable.

Indicates whether the device can make or receive conference calls, allowing multiple participants to join a single call session.

The total number of text lines that a device’s built‑in or external display can show at once. It indicates how many separate rows of characters are visible on the screen, which is useful for understanding readability and interface layout.

Indicates whether the product requires an active Internet connection to function, update, or access online services. A value of "Yes" means the device must be connected to the Internet for normal operation, while a value of "No" indicates it can operate independently without network access.

Indicates whether the product includes a built‑in navigation system such as GPS, GLONASS, BeiDou or similar satellite‑based positioning technology.

A list of the audio codecs that a product can use for transmitting or recording voice signals, such as G.711, AMR‑NB, Opus, etc. Each value represents a valid codec supported by the device’s hardware or software.