Open Computer Network
OCN (オーシーエヌ), or Open Computer Network(オープン・コンピュータ・ネットワーク:Ōpun Konpyūta nettowāku), is the largest Japanese Internet service provider, with over 7 million subscribers.[1] It is owned by NTT Communications Corp, one of the largest telecommunication companies in the world. It offers dial-up and ISDN, DSL up to 50 Mbit/s and fiber up to 200 Mbit/s download and 100 Mbit/s upload.[2]
As a result of regulations intended to promote competition, OCN themselves offer only internet service (routing); the physical line can be offered by NTT (the parent corporation), or by another company. Speeds up to 1 Gbit/s are offered in Western Japan, while in East Japan only 200 Mbit/s is officially offered for residential use, even though the underlying fiber infrastructure is capable of 1 Gbit/s.
OCN also offers an MVNO mobile broadband service called "OCN Mobile One", based on NTT Docomo's LTE infrastructure. Initially it started out as a data-only service, but more recently OCN Mobile One also offers an onseikake SIM card (音声対応SIMカード) that provides full service (data, SMS and voice) without requiring any calling app.[3]
See also
- Verio
References
External links
- Official OCN website
- Start of OCN Business Web Service and its Future at Science Links Japan
- NTT communications
- OCN known as ocn.ad.jp is also the source of a large number of phishing spam emails and Malware distribution activity
- Discussion regarding ocn.ne.jp as a source of spam/malware
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- AutoWeb Communication Inc
- HKNet
- Nippon Telegraph & Telephone East Corp
- Nippon Telegraph & Telephone West Corp
- NTT Communications
- NTT Communicationware Corp
- NTT Comware Corp
- NTT Data Corp
- NTT Facilities Inc
- NTT Finance Japan Co Ltd
- NTT Leasing Co Ltd
- NTT Worldwide Telecommunications Corp
- NTT America, Inc.
- NTT Europe Ltd
- Verio
- Plala
- Open Computer Network
- Docomo Pacific
- Hikari TV
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