NTT Access Network Service Systems Laboratories are developing virtualization functions of optical access systems and so have advanced Open Source Software (OSS) for SDN-Enabled Broadband Access (SEBA).

NTT Access Network Service Systems Laboratories developed the Wireless IP Access System (WIPAS STEP2), which uses the 26-GHz frequency band and combines wireless technology with an optical network. Services were made available over the STEP 2 system beginning in July 2003 in Haramachi city, Fukushima Prefecture for its civilian municipal access system. In November 2003, NTT East and NTT West added it to their menus of B FLETS service offerings. The number of shipped WT is approximately 5,800 units.
Moreover, NTT reduced the equipment cost drastically and added advanced functions. Services based on the our new Wireless IP Access System (low-cost and advanced version) will be made available beginning in 2004.

NTT Access Network Service Systems Laboratories developed the Wireless IP Access System (WIPAS STEP1), which uses the 26-GHz frequency band and combines wireless technology with an optical network. Services were made available over this STEP 1 system beginning in September 2002 when NTT East and NTT. Moreover, NTT has developed the WIPAS STEP2 that doubles the transmission rate of the STEP 1 system (the transmission capacity is 80 Mbit/s) and is implemented much more compactly. Services based on the WIPAS STEP 2 will be made available beginning in 2003.