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