1. Adtran
2. Amdocs Management Limited
3. Arista Networks Inc.
4. AT&T Inc.
5. Broadcom Inc.
6. Calix Inc.
7. Ciena Corporation
8. Cisco Systems Inc.
9. CommScope Holding Company Inc.
10. Corning Incorporated
11. Crown Castle Inc.
12. Fujitsu Limited
13. Hewlett Packard Enterprise Development LP
14. Huawei Technologies Co. Ltd.
15. Infinera Corporation
16. Intel Corporation
17. InterDigital Inc.
18. Juniper Networks Inc.
19. KBR Inc.
20. NEC Corporation
21. Nokia Corporation
22. Qualcomm Technologies Inc.
23. Samsung Electronics Co. Ltd.
24. TE Connectivity
25. Telefonaktiebolaget LM Ericsson
26. Teleste Oyj
27. Telit
28. Ubiquiti Inc.
29. Verizon
30. ZTE Corporation