- SK Telecom Co. Ltd.
- Nokia Corporation
- Telefonaktiebolaget LM Ericsson
- Saguna Networks Ltd.
- AT&T Inc.
- Huawei Technologies Co. Ltd.
- ADLINK Technology Inc.
- SMART Embedded Computing (Artesyn Embedded Technologies)
- ZephyrTel Inc. (ESW Capital Group Company)
- Quortus Limited