--- title: Liberty AV Solutions Blog for the Pro Audio/Video Market | Ralph Parrett description: Stay Up-To-Date with the Latest News, Technology and Products in the Pro AV Market --- # [Logo](https://secure.libertycable.com/index.php) ## Login to Liberty --- \*Email: \*Password: Keep me logged in Login --- [Don't have an accout yet? 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It may be the resolution of your devices. Or it may be whether your cable is built for 4K or not. ##### 4K ADAPTERS ARE POWERED  To adequately deliver 4K content to your screen, our DisplayPort adapters require power. Therefore, they must be plugged directly into a source with adequate power. If you are using a laptop, ensure that it is on line power and not on battery power. These adapters draw nearly a full watt of power when active. [Read More](https://blog.libertycable.com/all-displayport-is-not-created-equal?hsLang=en-us) 0 Comments [Click here to read/write comments](https://blog.libertycable.com/all-displayport-is-not-created-equal?hsLang=en-us#comments-listing) Topics: [HDMI](https://blog.libertycable.com/topic/hdmi), [4K](https://blog.libertycable.com/topic/4k), [DisplayPort](https://blog.libertycable.com/topic/displayport), [Adapter Ring](https://blog.libertycable.com/topic/adapter-ring), [hdmi adapter ring](https://blog.libertycable.com/topic/hdmi-adapter-ring) # [When USB is Not Just USB](https://blog.libertycable.com/when-usb-is-not-just-usb?hsLang=en-us) Posted by [Ralph Parrett](https://blog.libertycable.com/author/ralph-parrett) on Mar 6, 2019 9:58:47 AM - [Tweet](https://twitter.com/share) [![](https://blog.libertycable.com/hubfs/Ralph%20USB%20Blog/hdmi_to_usb-c_cable.jpg)](https://blog.libertycable.com/when-usb-is-not-just-usb?hsLang=en-us) USB-C connectors can lead to a lot of confusion. But a few simple tools and tricks can help ensure consistently good results. Normally, when you see a jack on a piece of equipment, it is what it is. For example, an HDMI® jack is for HDMI® video. VGA is for VGA video, and so on. [Read More](https://blog.libertycable.com/when-usb-is-not-just-usb?hsLang=en-us) 0 Comments [Click here to read/write comments](https://blog.libertycable.com/when-usb-is-not-just-usb?hsLang=en-us#comments-listing) Topics: [BYOD](https://blog.libertycable.com/topic/byod), [USB-C](https://blog.libertycable.com/topic/usb-c), [bring your own device](https://blog.libertycable.com/topic/bring-your-own-device), [USB](https://blog.libertycable.com/topic/usb), [hdmi adapter ring](https://blog.libertycable.com/topic/hdmi-adapter-ring) # [Plenum rated cable pulling and installation practices in cold weather](https://blog.libertycable.com/plenum-rated-cable-pulling-and-installation-practices-in-cold-weather?hsLang=en-us) Posted by [Ralph Parrett](https://blog.libertycable.com/author/ralph-parrett) on Jan 8, 2018 2:54:18 PM - [Tweet](https://twitter.com/share) [![](https://blog.libertycable.com/hubfs/LibertyAV/Images/LIBAV-Cold-Pull_405.jpg)](https://blog.libertycable.com/plenum-rated-cable-pulling-and-installation-practices-in-cold-weather?hsLang=en-us) ‘Tis the Season for the dreaded “Cold Pull”. During the winter months Liberty typically sees claims of cable jackets cracking and splitting from customers. In almost every instance the product exhibits splits and cracks every couple of feet. This is not a defective cable but is an example of incorrect installation procedure by the installer. Plenum compounds are very stiff due to the additions of chemicals to prevent flame spread and smoke generation. Cold temperatures cause this to become very brittle and when the cable is flexed – the jacket shatters and/or cracks as shown below: [Read More](https://blog.libertycable.com/plenum-rated-cable-pulling-and-installation-practices-in-cold-weather?hsLang=en-us) 1 Comment [Click here to read/write comments](https://blog.libertycable.com/plenum-rated-cable-pulling-and-installation-practices-in-cold-weather?hsLang=en-us#comments-listing) Topics: [Technical Bulletin,](https://blog.libertycable.com/topic/technical-bulletin), [plenum](https://blog.libertycable.com/topic/plenum), [cold](https://blog.libertycable.com/topic/cold), [cable cracking](https://blog.libertycable.com/topic/cable-cracking), [plenum cable](https://blog.libertycable.com/topic/plenum-cable), [cold weather](https://blog.libertycable.com/topic/cold-weather) # [Category Cables and their non-Category applications](https://blog.libertycable.com/category-cables-and-their-non-category-applications?hsLang=en-us) Posted by [Ralph Parrett](https://blog.libertycable.com/author/ralph-parrett) on Apr 25, 2016 10:00:00 AM - [Tweet](https://twitter.com/share) [![](https://blog.libertycable.com/hubfs/LibertyAV/Images/24-4P-L7SH.jpg)](https://blog.libertycable.com/category-cables-and-their-non-category-applications?hsLang=en-us) 100-Ohm twisted pair cabling has come a long way since the first launch of the 568 standard. Categories 1, 2, 4, and 5 are obsolete. Category 3 hangs on by a ripcord and Category 5e has already lost its market lead to Category 6. Category 6A is moving out of data centers and demand is increasing for even higher performing cables. Category 7 is officially skipped in the US market and Category 8 is in the ratification process. [Read More](https://blog.libertycable.com/category-cables-and-their-non-category-applications?hsLang=en-us) 0 Comments [Click here to read/write comments](https://blog.libertycable.com/category-cables-and-their-non-category-applications?hsLang=en-us#comments-listing) Topics: [UTP](https://blog.libertycable.com/topic/utp), [twisted pair](https://blog.libertycable.com/topic/twisted-pair), [cat 6](https://blog.libertycable.com/topic/cat-6), [cat 6a](https://blog.libertycable.com/topic/cat-6a), [cat 7](https://blog.libertycable.com/topic/cat-7), [cat 8](https://blog.libertycable.com/topic/cat-8), [PoE](https://blog.libertycable.com/topic/poe), [cat 5e](https://blog.libertycable.com/topic/cat-5e), [HDBaseT](https://blog.libertycable.com/topic/hdbaset), [STP](https://blog.libertycable.com/topic/stp), [FTP](https://blog.libertycable.com/topic/ftp) # [The case for Category 7](https://blog.libertycable.com/the-case-for-category-7?hsLang=en-us) Posted by [Ralph Parrett](https://blog.libertycable.com/author/ralph-parrett) on Oct 29, 2014 8:33:00 PM - [Tweet](https://twitter.com/share) First thing, full disclosure and the honest truth – there is no such thing as a “Category 7”. However keep reading! In the USA, the highest official Category rating is 6A (Category 6 Augmented). Category 6A is a 10 Gigabit Ethernet infrastructure cable officially certified to 500 MHz. It can be shielded or unshielded. In Europe there are two twisted pair ratings above Category 6A, namely ISO 11801 Class F and Class FA. Class F cable is nicknamed “Category 7” in the US. Class FA has been called Category 7E or Category 7A. The true Category 8 standard is in discussion at this time and has not been ratified. All of these cable are shielded, usually with multiple shields. [Read More](https://blog.libertycable.com/the-case-for-category-7?hsLang=en-us) 0 Comments [Click here to read/write comments](https://blog.libertycable.com/the-case-for-category-7?hsLang=en-us#comments-listing) Topics: [cutting edge tech,](https://blog.libertycable.com/topic/cutting-edge-tech) # [Plenum rated cables and pulling and installation practices in cold weather](https://blog.libertycable.com/plenum-rated-cables-and-pulling-and-installation-practices-in-cold-weather?hsLang=en-us) Posted by [Ralph Parrett](https://blog.libertycable.com/author/ralph-parrett) on Oct 29, 2014 6:45:13 PM - [Tweet](https://twitter.com/share) [![](https://blog.libertycable.com/hs-fs/hub/427311/file-1982475349.jpg)](https://blog.libertycable.com/plenum-rated-cables-and-pulling-and-installation-practices-in-cold-weather?hsLang=en-us) ‘Tis the Season for the dreaded “Cold Pull”. During the winter months Liberty typically sees claims of cable jackets cracking and splitting from customers. In almost every instance the product exhibits splits and cracks every couple of feet. This is not a defective cable but is an example of incorrect installation procedure by the installer. Plenum compounds are very stiff due to the additions of chemicals to prevent flame spread and smoke generation. Cold temperatures cause this to become very brittle and when the cable is flexed – the jacket shatters and/or cracks as shown below: [Read More](https://blog.libertycable.com/plenum-rated-cables-and-pulling-and-installation-practices-in-cold-weather?hsLang=en-us) 0 Comments [Click here to read/write comments](https://blog.libertycable.com/plenum-rated-cables-and-pulling-and-installation-practices-in-cold-weather?hsLang=en-us#comments-listing) Topics: [Technical Bulletin,](https://blog.libertycable.com/topic/technical-bulletin) [All posts](https://blog.libertycable.com/all) - [WebBlox](https://secure.libertycable.com/webblox) - [Contacts](https://secure.libertycable.com/liberty-contacts.php) - [Blog](https://blog.libertycable.com) - [Register](https://secure.libertycable.com/user-registration.php) - Take a tour! - [Cart](https://secure.libertycable.com/shopping-cart.php) - Login - e-Learning - Brands - Selectors - [Cable: Bulk Cable](https://secure.libertycable.com/product-categories.php?parentcode=101&parenttitle=Cable%3A+Bulk+Cable) - 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