KDDI Copper network. KDDI owns legacy twisted-pair infrastructure supporting IP telephony and basic broadband in rural zones via Metal Plus branding (Source).
Japan
Network: Any physical infrastructure network that forms a telecom-related network and occupies physical space in/on the ground.
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KDDI Copper network. KDDI owns legacy twisted-pair infrastructure supporting IP telephony and basic broadband in rural zones via Metal Plus branding (Source).
KDDI Copper network uses copper technology, utilizing existing twisted-pair lines for entry-level ADSL and IP telephony services up to 100 Mb/s in legacy or underserved areas. (Source), (Source)
KDDI Copper network uses adsl standard, employing ADSL2+ over twisted-pair for asymmetric speeds up to 24 Mb/s in legacy Metal Plus services. (Source), (Source)