This document is the operation manual for the VST3300 Series All-In-One IP PBX, introducing the features and characteristics of the product.
About this manual
The VST3300 Series is an all‑in‑one IP PBX that combines traditional PBX, IP‑PBX, SIP server and SIP client functions in a single device. It supports analog and SIP extensions, fax, and voice mail, offering high‑quality voice communication over an Internet connection.
This manual covers safety instructions, installation steps, detailed configuration of extensions, trunks, SIP devices, conference calls, firmware updates, and backup procedures. It also includes parameter tables for DNS settings, service ports, remote management, and VAD control, as well as troubleshooting guidance.
What's inside
- Safety Instructions
- Preface
- Feature Overview
- Extension Planning and Configuration
- Trunk and SIP Configuration
- Analog PBX Connection
- Voice Mail and Fax Setup
- Firmware Update and Backup
Specifications
| Analog Channels (per model) | 3–4 |
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| SIP Channels (default) | 8–12 |
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| SIP Trunks (default) | 2 |
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| Supported FXO/FXS ports | FXO +2FXS (VST3305), 4FXS, 4FXO, etc. |
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| Remote Management Control (TCP) | Enabled (1) or Disabled (0) |
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| VAD Control default | Enabled |
Frequently asked questions
How can I reset the password of an individual extension line?
Enter the two‑digit extension number (11‑26) and the system will reset the password to the default blank value.
What is the default setting for VAD control?
VAD control is enabled by default.
What safety precaution should be taken to avoid electric shock?
Do not insert fingers, pins, wires, or any metal objects into vents and gaps.