Communication Network (Transmission, Wireless)Product Name

SDH Optical Transmission Terminal Equipment Design Technology

Design specifications for NTT's SDH (synchronous digital hierarchy) optical transmission terminal equipment, LTMUX modules, cross-connection modules and interface-conversion modules, based on Japanese and ITU standards.

Passive Double Star (PDS) Subscriber Transmission Technology

Time-compression multiplexing/demultiplexing and system configuration technology, which enables an economical two-way access communication by using a star coupler and single optical fiber to connect multiple subscribers to a center.

Digital Radio Link Design Technology

Link design technology necessary for terrestrial line-of-sight digital radio systems using 4 ~ 6 GHz and 11/15 GHz bands.

Gaussian Filtered Minimum Shift Keying(GMSK) Modulation Technology

Design technology of digital modulation-demodulation circuits for mobile telecommunication system for cordless phones, car phones, etc.

Multi-Port Amplifier Design for Communication Satellite

Design technology of high-power relay amplifiers with less power consumption for large-capacity multi-beam mobile communication satellites.

Design of Digital Service Units for ISDN Network 1500 kbps Service

Design technology of Digital Service Units for ISDN with data transmission capacity of 1.54Mb/s over optical fiber cables.

Design technology of Digital Service Units for information network systems

Design of Digital Service Units for I-Interface Digital Lines

DSU design technology for high-speed, large-capacity and high-quality digital transmission lines, in accordance with I-Interface, using the fiber-optic subscriber transmission system. It is indispensable for LAN within corporations.

High-density Packaging System Architecture for Switching and Transmission Systems

Mounting technology for high-density and high-speed digital systems based on NTT and IEC Standards (Hi-PAS Packaging Technology).

Wireless Access System Design Technology

Circuit design technology employed in point-to-point networks for large-scale subscribers and point-to-multipoint networks for residential use in wireless access systems.