Please see the company information.
https://www.softbank.jp/en/corp/aboutus/

SoftBank

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Cloud Connectivity

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BB Backbone Corp. is a telecommunication service company that supports customer network development and network expansionusing Dark Fiber ,Spectrum solutions and sXGP technology (a next-generation PHS service).&lt;Dark Fiber&gt;In addition to our own high-quality fiber, we offer fiber solutions optimized for the customer using provider-neutral fiber design. We have proven track record as a highly-regarded provider for Domestic and Gobal Carriers, OTTs, Hyperscalers, Contents Delivery Service Providers, Cloud Service Providers and Data Center Operators.&lt;Spectrum Service&gt;By using the OOLS Wavelength Division Multiplexing (WDM) technology, we split the dark fiber capacity into wavelength grids (Spectrum) providing low cost high capacity connections. Customers can utilize the new transponder capabilities and use this spectrum grid for connections over 100Gbps, 200Gbps and 400Gbps and over. Spectrum can be a solution to balance the high bandwidth and low connectivity cost.&lt;sXGP&gt;sXGP is a Japanese standard “private LTE” that uses PHS frequency bands (1.9 GHz) and does not require a license.  Private networks can be constructed using sXGP (shared Xtended Global Platform).Furthermore, it is also distinct in its compatibility with local 5G.sXGP The following is a video envisioned based on this concept.

BB Backbone Corp.