This manual introduces the commonly used functions of the Inter-Tel 8520 terminal, including calling internal lines, external lines, answering calls, placing calls on hold, and making emergency calls
This guide covers basic telephone operations such as placing intercom and outside calls, answering calls, holding, conferencing, forwarding, adjusting volume, redialing, paging, and emergency dialing. It also explains how to use voicemail features, including accessing the mailbox, listening to messages, recording, and sending voice mail.
Additional sections describe remote feature access, Do‑Not‑Disturb settings, call forward configuration, and detailed feature codes. The document includes a voice‑mail flowchart and a list of feature codes for quick reference.
Dial an extension number.
Dial the voice mail extension number.
Press the Hold button (or the &¥ key) while on the call.