1. Adtran Inc.
2. Allied Telesis Holdings K.K.
3. Alphion Corporation
4. AT&T Inc.
5. Calix Inc.
6. Cisco Systems Inc.
7. CommScope Inc.
8. DZS Inc.
9. GPONdoctor
10. Hexatronic Group
11. Huawei Technologies Co. Ltd.
12. Intel Corporation
13. Iskratel
14. Juniper Networks Inc.
15. Juno Telecoms Ltd.
16. Leviton Manufacturing Co. Inc.
17. Mitsubishi Electric Corporation
18. Molex by Koch Industries Inc.
19. Multicom Inc.
20. NCIS Group
21. NEC Corporation
22. Nokia Corporation
23. PowerCom
24. The Fast Mode
25. ZTE Corporation