•You can use the wireless radio switch to disable the wireless radio of all the wireless devices on your computer.

•If your computer is a Windows 7 model, to display the Access Connections status icon and the wireless status icon in the system tray, refer to the Access Connections on-line help.

Using the built-in modem

If your computer has a modem feature, you can send or receive data and faxes over a telephone line. This modem uses a digital signal processor (DSP), and its software can be upgraded, allowing great flexibility.

You can use the modem only on a public-switched telephone network (PSTN). You cannot use a private branch exchange (PBX) or some other type of digital telephone extension line. If you connect the modem to a line other than PSTN, an error message appears, preventing you from using the line. If you are not sure which kind of phone line you are using, contact your telephone company.

DANGER

To avoid shock hazard, do not connect the cable to or disconnect the cable from the telephone outlet on the wall during electrical storms.

Note: Your computer might have both the modem connector and the Ethernet connector. Be sure to connect your cable to the correct one.

Telephony features

The built-in modem has the following telephony features:

Industry standard modem support up to 56 Kbps:

Data protocols

•Bell 103 (300 bps)

•Bell 212A (1200 bps)

•V.21 (300 bps)

•V.22bis (2400 bps)

•V.34bis (33600, 31200 bps)

•V.34 (28800, 26400, 24000, 21600, 19200, 16800, 14400, 12000, 9600, 7200, 4800 bps)

•V.90 (56000 bps downstream only)

Error correction/Data compression protocols

•MNP2-4 (Microcom error correction)

•V.42 (error-correcting procedures for DCEs using asynchronous automatic dialing and control)

Data compression protocols

•V.42bis (DCE data compression)

•V.44

•MNP5 (Microcom data compression)

Miscellaneous protocols

•V.8 (startup sequence)

•V.80 (video phone)

Chapter 2. Using your computer 57

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Lenovo 42421A0, NVS-4200M manual Using the built-in modem, Telephony features, Industry standard modem support up to 56 Kbps
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4242X04, NVS-4200M, 42421A0, 42825BU specifications

Lenovo offers a diverse range of products tailored to meet the needs of professionals and consumers alike. Among them, models such as the Lenovo 42825BU, 42421A0, and 4242X04 stand out with impressive specifications that cater to various use cases.

The Lenovo 42825BU is an excellent choice for those seeking a dependable laptop for general productivity tasks. Powered by the latest generation Intel Core processor, it ensures smooth performance whether you're working on spreadsheets, attending virtual meetings, or browsing the web. One of its standout features is the high-resolution display that delivers vivid colors and sharp images, making it perfect for graphic design work or watching videos. Furthermore, the device includes ample RAM, allowing for multitasking without lag and enhancing overall efficiency.

Next in line, the Lenovo 42421A0 offers enhanced processing power and graphics performance thanks to the inclusion of the NVIDIA NVS-4200M graphics card. This feature is particularly beneficial for professionals who require a workstation that can handle demanding graphical applications such as video editing and 3D modeling. The NVS-4200M provides excellent visual output, ensuring that users can work with advanced graphics tools without compromising performance.

The 4242X04 model takes portability to another level without sacrificing power, making it ideal for on-the-go professionals. With a lightweight design and long battery life, it allows users to work from anywhere without the constant need for a power source. Coupled with fast charging technology, users can quickly recharge their devices during breaks, ensuring minimal downtime.

All these Lenovo models are built with reliability and durability in mind, often featuring robust chassis that can endure daily wear and tear. Additionally, they incorporate various security features including biometric login options, enabling safe and secure access to sensitive data.

In summary, the Lenovo 42825BU, 42421A0, and 4242X04 laptops are designed to meet the demands of a diverse user base. With powerful processing capabilities, impressive graphics performance, and features designed for portability and durability, these models are well-suited for both professional and personal use.
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