Manufacturers & Service Providers
| Manufacturer / Provider | URL |
| ADVA AG Optical Networking | www.advaoptical.com |
| Alcatel-Lucent | www.alcatel-lucent.de |
| Vodafone / Arcor AG & Co. KG | www.vodafone.de |
| BKtel communications GmbH | www.bktel.com |
| Ciena Corporation | www.ciena.com |
| Cyoptics | www.cyoptics.com |
| ECI Telecom GmbH | www.ecitele.com |
| Finisar Corporation | www.finisar.com |
| Force10 Networks, Inc. | www.force10networks.com |
| IMC Networks | www.imcnetworks.com |
| LambdaNet
Communications Deutschland AG |
www.lambdanet.net |
| MergeOptics GmbH | www.mergeoptics.de |
| NewTelco GmbH | www.newtelco.de |
| Nortel GmbH | www.nortel.de |
| Nokia Siemens Networks | www.nokiasiemens.com |
| RoodMicrotec GmbH | www.roodmicrotec.com/de |
| TelecityGroup | www.telecitygroup.de |
| Vertilas GmbH | www.vertilas.de |