Product is high quality. This is a Fax Data Model adapter only. It does not support voice functions and cannot make or receive phone calls. It provides dial-up Internet connectivity for your computer via network cable and supports sending and receiving faxes. Note: For Windows 10 users, you must disable the mandatory driver signature enforcement before installing the driver software. After installation, you may re-enable the driver signature enforcement. For instructions, search online using: "How to disable mandatory signature for Windows 10 driver." Main features: Send and receive faxes, and connect to the Internet via dial-up (maximum speed 56K). Does not support voice calling. Easy-to-use USB modem that supports fax transmission, reception, and caller ID display. Users must download compatible software independently. Stable performance with broad software compatibility. Specifications: - Full-duplex 56Kbps data/fax modem - Data Mode: Supports V.44, V.42bis, and MNP5 data compression - Fax Mode: Group 3, Class 1 - Data Mode: V.92, V.90 up to 56 Kbps - Error Correction: V.42, MNP4-2 - Voice/fax/modem detection - Includes 1x driver CD, 1x USB cable, and 1x phone/line cable - Compatible with Windows 98, 98SE, ME, 2000, XP, Vista, Win7, Win8, 8.1, and Win10 - Computer-based 56K modem for paperless faxing; supports built-in fax software on XP (compatibility with other fax software not guaranteed) - Equipped with Conexant 93010 chip for stable performance - Compatible with fax software such as system-native fax tools, Aofax, Bitware, and Winfax (EastFax not supported) - USB modem with Conexant main chip, supports caller ID, functions as a full-soft modem Data Protocol: ITU-V.92, V.90, V.34, V.32bis, V.32, V.22bis, V.22, V.23, V.21, Bell 212A, 103 Error Correction: V.42 LAPM, MNP 2-4 Data Compression: V.44, V.42bis, MNP5 Command Set: EIA/TIA-578 Class 1, Hayes AT command set compatible Flow Control: Software (XON/XOFF) or hardware (RTS/CTS) Dialing Mode: Tone, Pulse Protection: Built-in lightning protection circuit for enhanced surge protection Installation Steps: 1. Connect the modem to your computer’s USB port. Connect the telephone line to the modem. If connecting a telephone, plug the line into the phone and connect an extension line from the phone’s port to the modem. 2. Install the driver: Insert the driver CD into the CD-ROM drive. When the computer detects new hardware, select manual installation and browse to the appropriate folder on the CD (e.g., cx-fu07+/winxp). For Windows 7 and later, the driver may install automatically. After installation, a modem named "USB Data Fax Voice Modem" will appear in the Modems section of the Control Panel. 3. Install fax software (using system-provided fax tools as example): In Windows 7, go to Control Panel > Devices and Printers > Fax Printer > Tools > Fax Settings, then enable sending and receiving. For Windows XP, install the fax component first. Package Includes: 1 x Dual RJ11 Ports USB 56K Fax Data Modem