[comp.dcom.telecom] Question About Feature Groups

tad@ssc.UUCP (Tad Cook) (02/23/90)

Several years ago I remember hearing some discussion about the
different classes of connections that a long distance carrier could
get at the called party office.  Some of them gave answer supervision,
and because some didn't, the carriers had to use funny voice detection
and timing schemes.  What were these connections called?


Tad Cook
tad@ssc.UUCP