This is an old revision of this page, as edited by InternetArchiveBot (talk | contribs) at 07:03, 1 October 2016 (Rescuing 1 sources and tagging 0 as dead. #IABot (v1.2.4)). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
 | The topic of this article may not meet Wikipedia's general notability guideline. Please help to demonstrate the notability of the topic by citing reliable secondary sources that are independent of the topic and provide significant coverage of it beyond a mere trivial mention. If notability cannot be shown, the article is likely to be merged, redirected, or deleted. Find sources: "ANSI C12.21" – news · newspapers · books · scholar · JSTOR (November 2009) (Learn how and when to remove this message) |
ANSI C12.21 is the American National Standard for Protocol Specification for Telephone Modem Communication.
 | This article related to telecommunications is a stub. You can help Wikipedia by expanding it. |
