Thanks for your question, for your question regarding VSS mode, discussed with our technical team that it is referred to the Cisco 4500x switch's function, which is not related to the copper cables.And from our order records, #30849 will be suitable for your CO 4500x devices, just feel free to contact your account manager if any further requests. ) By M***g on 02/07/2021

No, it can’t be used in the stack port of your device. FS DAC & AOC can only be used in the business port of the switch to achieve virtual stacking, but can not be used in the stack port to achieve physical stacking. The stacking through the stack port of device belongs to physical stacking which needs a specific stacking cable, and it is under development for now. By E***n on 11/24/2020

These DAC couldn't be backwards compatible with SFP(1Gb), if you need 1G DAC, please feel free to contact your account manager. By *** on 01/30/2020

Thanks for your question. Could you please provide the specific model of TP-Link and Dell equipment? We need to judge by these information. By *** on 08/29/2019

Yes, you can. FS.COM offers customized dual compatibility solutions for direct attach cables so that you can choose compatibilities for each end individually. All you need to do is to select "Dual Compatibility Solutions" option in Compatible Brands drop-down box and note down your devices' model numbers in custom page. By N***e on 07/10/2017

As for customized direct attach cables, FS.COM offers regular custom choices such as compatibility, cable length, cable color, operating temperature, label pattern, label colors and etc. What's more, FS.COM welcomes any inquiry for customized products and solutions for all need and specifications. By G***d on 06/05/2017

Besides the price advantage we have compared to brand cables, FS.COM DACs also maintain the same performance and reliability. To satisfy our customers' needs of high performance, all of our DACs are tested multiple times in mainstream original brand switches in our test center before shipped out. What's more, using compatible optics in brand devices will not negatively affect manufacturers' warranty if that's your concern. By I***n on 05/22/2017

FS.COM has been maintaining huge stock level of 10G SFP+ Passive Direct Attach Copper Twinax Cables in U.S. warehouse, EU warehouse and CN warehouse. As long as the products you order are all in stock, we will ship them out the same day you place your order. As for some specific products or products that have a short stock, we will keep you informed ahead of time before you place your order. By L***z on 05/08/2017

FS.COM offers 10G SFP+ Passive Direct Attach Copper Twinax Cables in 30AWG for 0.5m, 1m, 1.5m, 2m, 2.5m, 3m cables and 24AWG for 4m, 5m, 6m, 7m cables. By H***o on 03/20/2017

FS.COM offers 10G SFP+ Passive Direct Attach Copper Twinax Cables in 0.5m, 1m, 1.5m, 2m, 2.5m, 3m, 4m, 5m, 6m, 7m and inquiries for customized lengths are also welcomed. By M***l on 03/16/2017