ITU-T Recommendation Q.2110, B-ISDN ATM adaptation layer - Service specific connection oriented protocol (SSCOP).

ITU-T Recommendation Q.2140, B-ISDN ATM adaptation layer - Service specific coordination function for signalling at the network node interface (SSCF at NNI).

The TMN layered organization is used as fundamental basis for the management software of ISDN, B-ISDN, ATM, SDH/SONET and GSM networks.

Thereafter, he joined the Electrical Communication Laboratories of NTT in 1972 where he has been involved in works on Video Coding, Facsimile Network, Image Processing, Telepresence, B-ISDN Network and Services, Internet and Computer Communication Applications.