Huawei; Cisco Systems; Fujitsu; NEC corporation; Nokia; Ericsson; Qualcomm; ZTE; Corning; Motorola solutions; Juniper networks; Ciena corporation; Alcatel-Lucent; Alvarion; ECI Telecom; GTL Infra; HFCL Infotel Ltd; Native Networks; NELCO; Nortel; Tellabs