IXO

from The Free On-line Dictionary of Computing (8 July 2008)

Telocator Alphanumeric Protocol
IXO
TAP

   <communications, protocol> (TAP, or "IXO", "PET") A {protocol}
   for submitting requests to a {pager} service.  IXO/TAP is an
   {ASCII}-based, {half-duplex} {protocol} that allows the
   submission of a numeric or alphanumeric message.

   Examples, protocol description, clarifications
   (ftp://mirror.lcs.mit.edu/telecom-archives/technical).

   See also {RFC 1568}.

   (1996-04-07)