1. Access Network Service Systems Laboratories, NTT Corporation, Tsukuba, Japan
2. Network Innovation Laboratories, NTT Corporation, Kanagawa, Japan
3. KDDI Research, Inc., Fujimino, Japan
4. Optical Communications Laboratory, Sumitomo Electric Industries Ltd., Yokohama, Japan
5. Fujikura Ltd., Sakura, Japan
6. Furukawa Electric Company, Ltd., Ichihara, Japan