[comp.dcom.telecom] How Does International Calling "Work"?

gabe@sirius.ctr.columbia.edu (Gabe Wiener) (10/13/90)

With all this talk about international calling, I had a few questions
I wanted to ask.  Here goes:

1.  When a US customer makes a call overseas, does the foreign telco
receive any money from the American carrier?  And vice versa?

2.  When AT&T was divested and other carriers started carrying int'l
calls, did every telco around the world then have to accommodate a new
set of incoming international trunks?

3.  When an international call come IN to the U.S., which carrier
carries the call from wherever the cable comes on shore (or the
satellite downlink is located) to the customer who may be in another
state?

And now for a broader question: What is the exact structure of the
international telephone system?  When a US customer makes a call to
some place off the beaten track, say Kuwait, Iraq, or Bhutan, how is
the call being routed, generally speaking?  Who decides on that
routing?

And another question: I was recently told that Bhutan was the most
recent country to get telephone service.  To that end, how does a
country installing a national telephone system go about putting itself
"online" with the rest of the world?

Thanks,

Gabe Wiener - Columbia Univ.
gabe@ctr.columbia.edu       
gmw1@cunixd.cc.columbia.edu 
72355.1226@compuserve.com