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From: mgrant@MIMSY.UMD.EDU.UUCP
Newsgroups: comp.dcom.telecom
Subject: Re: phonevision
Message-ID: <8706100211.AA24322@mimsy.umd.edu>
Date: Tue, 9-Jun-87 22:11:41 EDT
Article-I.D.: mimsy.8706100211.AA24322
Posted: Tue Jun  9 22:11:41 1987
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I have seen picture-phones working on the Switched-56 network (AT&T's
product that provides 56kbps end to end), the voice went over a seperate
longdistance line.  I can asure you that the quality of each individual
frame was superb, but the network delay and jittering made it almost
worthless.  I also experienced a picture-phone link over T1, (albeit, to
the next room, but still T1 (T1 is 1.544 Mbps)).  I have to say that
this was both crystal clear, and almost undetectable from full video.
If the person turned their head real quick, the screen blured, but the
action didn't stop as with the switched-56 service.

The T1 service also carried voice as well.  This service I could use.  If
it wasn't so dang expensive!  I also don't think there is a switched T1
yet, atleast not one that can be dialed by the user.  Anyone know anything
different?

-Mike

p.s. according to the AT&T person I talked to at length, they can now
provide full T1 over 1 twisted pair, (I thought it was 2), to most
customers in the nation.  Most subscribers are apparently not that far
from their CO.  If there is interest, I will call my friend at AT&T back
and badger her somemore.