Keystone modules and adaptersKeystones are a widespread standard in network technology and are used in industrial cabling as well as in data centers and home networks.
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![Keystone portfolio of EFB-Elektronik Keystone portfolio of EFB-Elektronik](https://www.efb-elektronik.de/media/51/28/20/1709644263/Keystone_LP_Produktheader_1100.jpg)
![Keystone portfolio of EFB-Elektronik Keystone portfolio of EFB-Elektronik](https://www.efb-elektronik.de/media/51/28/20/1709644263/Keystone_LP_Produktheader_1100.jpg)
![](https://www.efb-elektronik.de/media/6c/72/88/1645789642/Katalog2022_Header.jpg)
The EFB catalogue for data network technologyDiscover the products that fit your requirements in the catalogue from EFB-Elektronik.
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![Modern data centre equipped with several tall server cabinets arranged in parallel rows. Two sections are highlighted in the foreground, each zooming in on a product in more detail: On the left, an unequipped splice box. On the right, an unequipped front Modern data centre equipped with several tall server cabinets arranged in parallel rows. Two sections are highlighted in the foreground, each zooming in on a product in more detail: On the left, an unequipped splice box. On the right, an unequipped front](https://www.efb-elektronik.de/media/16/ab/89/1714375824/03_24_Headerbild_Schranksysteme_1100.jpg)
Unequipped splice boxes and front panelsWe have expanded our selection of splice boxes for you. You can now also get splice boxes in 2U in gray or black with the matching front panels.
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![Modern data centre equipped with several tall server cabinets arranged in parallel rows. Two sections are highlighted in the foreground, each zooming in on a product in more detail: On the left, an unequipped splice box. On the right, an unequipped front Modern data centre equipped with several tall server cabinets arranged in parallel rows. Two sections are highlighted in the foreground, each zooming in on a product in more detail: On the left, an unequipped splice box. On the right, an unequipped front](https://www.efb-elektronik.de/media/16/ab/89/1714375824/03_24_Headerbild_Schranksysteme_1100.jpg)
Unequipped splice boxes and front panelsWe have expanded our selection of splice boxes for you. You can now also get splice boxes in 2U in gray or black with the matching front panels.
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![](https://www.efb-elektronik.de/media/6c/72/88/1645789642/Katalog2022_Header.jpg)
The EFB catalogue for data network technologyDiscover the products that fit your requirements in the catalogue from EFB-Elektronik.
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We care for connection since 1988
EFB-Elektronik GmbH is a leading manufacturer and system provider of networking and technology and industrial system solutions. Our expertise ranges from structured cabling using certified high-end products for data centres to custom developments for industrial clients. Our team services customers worldwide from our headquarters in Bielefeld / Germany.
![efb-elektronik-hauptsitz efb-elektronik-hauptsitz](https://www.efb-elektronik.de/media/b4/be/73/1645088799/EFB-Elektronik_HQ.jpg)
![In a meeting at a table, a customer of EFB-Elektronik is being advised. There is a laptop on the table. The consultant is holding a cable in his hand. In a meeting at a table, a customer of EFB-Elektronik is being advised. There is a laptop on the table. The consultant is holding a cable in his hand.](https://www.efb-elektronik.de/media/6c/c8/bd/1682587295/EFB-Elektronik_Corporate-Picture_Bielefeld_Services_X44_0001._1100.jpg)
![Woman at cable assembly, EFB-Elektronik Woman at cable assembly, EFB-Elektronik](https://www.efb-elektronik.de/media/5b/a9/e5/1679489686/EFB-Elektronik_Corporate-Picture_Sonneberg_Fertigung_X08_00001_1100.jpg)
![In a general view the production of EFB-Elektronik in Bielefeld is shown. Various, cheerful employees can be seen in the picture - they are busy with the assembly. In a general view the production of EFB-Elektronik in Bielefeld is shown. Various, cheerful employees can be seen in the picture - they are busy with the assembly.](https://www.efb-elektronik.de/media/9b/6b/fd/1682407658/EFB-Elektronik_Corporate-Picture_Bielefeld_Fertigung_X26_0001_1100.jpg)
![In a meeting at a table, a customer of EFB-Elektronik is being advised. There is a laptop on the table. The consultant is holding a cable in his hand. In a meeting at a table, a customer of EFB-Elektronik is being advised. There is a laptop on the table. The consultant is holding a cable in his hand.](https://www.efb-elektronik.de/media/6c/c8/bd/1682587295/EFB-Elektronik_Corporate-Picture_Bielefeld_Services_X44_0001._1100.jpg)
Consultation
Learn more![Woman at cable assembly, EFB-Elektronik Woman at cable assembly, EFB-Elektronik](https://www.efb-elektronik.de/media/5b/a9/e5/1679489686/EFB-Elektronik_Corporate-Picture_Sonneberg_Fertigung_X08_00001_1100.jpg)
Special assemblies fiber optic cabling
Learn more![In a general view the production of EFB-Elektronik in Bielefeld is shown. Various, cheerful employees can be seen in the picture - they are busy with the assembly. In a general view the production of EFB-Elektronik in Bielefeld is shown. Various, cheerful employees can be seen in the picture - they are busy with the assembly.](https://www.efb-elektronik.de/media/9b/6b/fd/1682407658/EFB-Elektronik_Corporate-Picture_Bielefeld_Fertigung_X26_0001_1100.jpg)
Special assemblies copper cabling
Learn more