Also, for each distributor's protection, we want to make certain that everyone understands that there is no warranty for this free library. If the library is modified by someone else and passed on, we want its recipients to know that what they have is not the original version, so that any problems introduced by others will not reflect on the original authors' reputations.

Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that companies distributing free software will individually obtain patent licenses, thus in effect transforming the program into proprietary software. To prevent this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all.

Most GNU software, including some libraries, is covered by the ordinary GNU General Public License, which was designed for utility programs. This license, the GNU Library General Public License, applies to certain designated libraries. This license is quite different from the ordinary one; be sure to read it in full, and don't assume that anything in it is the same as in the ordinary license.

The reason we have a separate public license for some libraries is that they blur the distinction we usually make between modifying or adding to a program and simply using it. Linking a program with a library, without changing the library, is in some sense simply using the library, and is analogous to running a utility program or application program. However, in a textual and legal sense, the linked executable is a combined work, a derivative of the original library, and the ordinary General Public License treats it as such.

Because of this blurred distinction, using the ordinary General Public License for libraries did not effectively promote software sharing, because most developers did not use the libraries. We concluded that weaker conditions might promote sharing better.

However, unrestricted linking of non-free programs would deprive the users of those programs of all benefit from the free status of the libraries themselves. This Library General Public License is intended to permit developers of non-free programs to use free libraries, while preserving your freedom as a user of such programs to change the free libraries that are incorporated in them. (We have not seen how to achieve this as regards changes in header files, but we have achieved it as regards changes in the actual functions of the Library.) The hope is that this will lead to faster development of free libraries.

The precise terms and conditions for copying, distribution and modification follow. Pay close attention to the difference between a "work based on the library" and a "work that uses the library". The former contains code derived from the library, while the latter only works together with the library.

Note that it is possible for a library to be covered by the ordinary General Public License rather than by this special one.

TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

0.This License Agreement applies to any software library which contains a notice placed by the copyright holder or other authorized party saying it may be distributed under the terms of this Library General Public License (also called "this License"). Each licensee is addressed as "you".

A "library" means a collection of software functions and/or data prepared so as to be conveniently linked with application programs (which use some of those functions and data) to form executables.

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ZyXEL Communications network camera manual

network camera specifications

ZyXEL Communications has established itself as a prominent player in the realm of networking and security solutions, particularly with its innovative lineup of network cameras. Designed to meet diverse surveillance needs, their network cameras encompass a range of features and technologies that cater to both residential and commercial applications.

One of the standout features of ZyXEL network cameras is their high-definition video quality. Many models offer options for 1080p and even 4K resolution, ensuring that users capture crystal-clear images and video footage. This level of clarity is crucial for identifying faces and license plates, making these cameras well-suited for various security environments.

ZyXEL network cameras are equipped with advanced night vision capabilities. Utilizing infrared technology, these cameras can capture clear video even in complete darkness. This feature is essential for 24/7 surveillance, providing peace of mind at all hours.

Another significant characteristic is the integration of smart analytics features. With motion detection, people counting, and line crossing detection, these cameras can intelligently process data and provide alerts to users when specific activities occur. This intelligent functionality enhances security by allowing for proactive monitoring, rather than simply recording footage.

The design of ZyXEL cameras also considers ease of installation and use. Many models come with wireless connectivity options, eliminating the need for complex wiring. This feature not only simplifies the setup process but also provides flexible placement options around the property.

Weather-resistant designs ensure that ZyXEL network cameras can withstand various environmental conditions. This rugged construction is especially important for outdoor installations, protecting the cameras from rain, wind, and extreme temperatures.

Compatibility with various management software and mobile applications offers users remote access to their surveillance feeds. This functionality allows for real-time monitoring from smartphones or tablets, providing convenience and peace of mind when away from the premises.

In summary, ZyXEL Communications network cameras combine high-definition video quality, advanced night vision, smart analytics, user-friendly installation, and robust weatherproof designs. These characteristics make them a versatile choice for anyone looking to enhance their security measures, whether for a home or a business. With a strong focus on innovation and customer satisfaction, ZyXEL continues to be a trusted name in the network camera sector.