| Attribute | Details |
|-----------|---------|
| Filename | zoiper-free-3.15-setup.exe |
| Software | Zoiper Free (Legacy) |
| Version | 3.15 |
| Publisher | Securax LTD |
| Type | Installer (Executable) |
| Typical Size | ~25–35 MB |
| Architecture | 32-bit (compatible with 64-bit Windows) |
| Supported OS | Windows 7, 8, 8.1, 10 (32/64-bit) |
The free version allows you to import contacts from your Windows Address Book (WAB) and integrates with standard phonebook formats (CSV/vCard).
Zoiper 3.15 features a classic, non-intrusive UI that can be minimized to the system tray. It includes a numeric keypad, call logs, and a contact list—all designed for quick access.
Security is a valid concern with older software. Here is an honest assessment:
For most users, downloading the current Zoiper 5 from the official site is the safer choice.
Zoiper 3.15 supports both SIP and IAX2 protocols. SIP is the industry standard used by most VoIP providers, while IAX2 is often used with Asterisk-based PBX systems. This dual support ensures compatibility with a wide range of services.