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This is where (yes) Big Brother is arriving... The Video Phone will work
pretty much just like it does in Science Fiction movies like 'Aliens' or
whatever. If two ISDN customers have video phones, they can talk and see
each other or whatever they want to show each other (HAHA) at the same time.
Video Phones obviously open up new frontiers for those with entrepreneurial
instincts. You can bet there will be some interesting Video Phone Sex lines
around... Then, you can have things like 'Dial a Movie...Please enter (1) to
view Rambo'..etc... The list goes on. This also leads to a whole new world
of problems for the telephone company like 'Obscene Video Calls'. This is
again where Calling ID becomes important.
Each of these units, and others that will work with ISDN will have some sort of
a special viewing screen that will contain the necessary information about
incoming calls which includes the originating number and can include such
things as :
<1> The name of the owner of that #
<2> The city and state
<3> The whole address for that #
AT&T ISDN Building Blocks
=========================
AT&T has designated certain 'building blocks' that will eventually be laid in
place across the entire country to form ISDN.
<1> AT&T Communications Service Node
------------------------------------
The service node is the customer's gateway to the AT&T Communications nodal
family of services, including MEGACOM, MEGACOM 800, and Acunet. The first
service node went into service in 1985 in Philadelphia, PA.
<2> Integrated Access
---------------------
This allows customers to integrate switched and private line services over a
single DS-1 link to the Service Node.
<3> Out-of-Band Signaling
-------------------------
Discussed earlier.
<4> CCS7
--------
The CCS7 Common Channel Signaling Network will soon replace CCIS as an
out-of-band signalling between AT&T Network Communications Facilities. Because
of its longer message format and layered structure, the CCS7 will support the
new features.
<5> Digital Backbone Network
----------------------------
This nationwide AT&T Network includes extensive lightwave and digital radio
routes. By the end of 1988, these Digital Lightwave routes will extend to
Europe with the TAT-8 lightwave system, and across the Pacific with
HAW-4/TPC-3.
<6> Intelligent Software Controlled
AT&T Communications Network
-----------------------------------
This brings about more advanced software related services listed in #1.
AT&T ISDN Operations
====================
Access Transport
----------------
Your DS-1 signal is transported from your ISDN equipment to an AT&T
Communications Service Node somewhere.
Your line gets to AT&T by tariff from the local exchange carrier (i.e...
Southwestern Bell, GTE, or whomever happens to own your local switch...) or
AT&T. The direct link to the AT&T Service Node bypasses your local switching.
AT&T Service Node
-----------------
Your local AT&T Service Node is a service office that acts as a gateway to
all the new AT&T Nodal ISDN services. This service node is typically composed
of :
<1> A Refinished 4ESS Switch
<2> CNI Ring (Common Net.-Interface)
<3> Digital Access and Cross Connect System (DACS)
Here is a diagram of how a customer location either goes to a local switch or
AT&T's node :
Key
---
CL = Customer Location
= = DS-1 Line
! = DS-1 Line
> = Exiting out to AT&T Network
--------
- -
**** - Bell -
*CL*=======- 5ESS -
**** - -