1. 3M Company
2. ADTRAN Inc.
3. ALE International
4. Calix Inc.
5. Cisco Systems Inc.
6. CommScope Inc.
7. Fonex Data Systems Inc.
8. Fujitsu Limited
9. Huawei Technologies Co. Ltd.
10. International Business Machines Corporation
11. NEXANS
12. Nokia Corporation
13. TE Connectivity
14. Telefonaktiebolaget LM Ericsson
15. Tellabs Inc.
16. TP-Link Technologies Co. Ltd
17. ZTE Corporation