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[Bill Woodcock]

First, my usual apology for replying in English.  My Spanish is quite 
rudimentary, and would be insufficient to convey my thoughts here.

I'm very much enjoying reading your paper.

Your stance vis a vis QoS is not clear...  You seem to be suggesting that 
it will enjoy some success in the future.  Is that in fact your position?  
And if so, can you elaborate somewhat on your reasons?

I'm also not quite clear on the nature of your disagreement with Andrew 
Odlyzko.  That may be a language issue, for which you have my apology.
In any event, if you say you have a disagreement with Andrew, that will 
raise many people's critical scrutiny, and you should probably be prepared 
to both be very clear, and to defend what you're saying.  It would also be 
worthwhile speaking with Andrew directly, if you haven't already, to make 
sure that you're not misinterpreting what he's intending to say.

Your points regarding a likely future in which metered-rate billing will 
become more predominant seem very well-made and well-supported.

In discussing the formation of the NAPs, you might mention that the MAE 
in Washington slightly pre-dated the NII NAPs, and was "grandfathered in" 
to the plan, unlike the others.  Its creation was not promoted by the NSF, 
like the other three.  Also, you have a couple of translation errors in 
that paragraph...  "NFS" and "MAE Center."

Throughout, you use the Latin American construction of "NAP" as equivalent 
to IXP, as well as literally as NAP, and since NAP and IXP are not 
themselves equivalent in meaning, this construction is unlikely to be 
understood in the sense that you mean it, by readers outside of Latin 
America.  About two-thirds of the way through the paper, you explicitly 
say "The ability to connect at local IXP's (sic) (Inter (sic) eXchange 
Points, i.e. NAP's(sic))" which would be pretty universally recognized as 
factually incorrect.  So that should probably be disambiguated throughout, 
with the standard usage of IXP where you mean IXP, and NAP only where you 
literally mean NAP, rather than where you mean IXP.

Your assertion that no Latin America operator is of sufficient scale, 
particularly relative to US or European operators, to make extra-regional 
acquisitions could be disputed, I think...  Telmex is certainly of 
sufficient scale, and was in fact in acquisitions talks with XO, a major 
US "tier 1" carrier, at one point.

You list the following quantities of IXPs in Latin American countries:

   Brazil: 8
  Ecuador: 2
Argentina: 1
 Colombia: 1
     Cuba: 1
    Chile: 1
     Peru: 1
   Panama: 1
 Paraguay: 1

I'd very much like to compare notes, as I'm only aware of five actually in 
operation in Brazil, would dispute the interpretation of ETECSA's transit 
service as an IXP based on what information I've had from them about it, 
but would be happy to learn otherwise...  Is the Nicaraguan IX in Managua 
not actually in operation?  I show that it had ten participants in April 
of 2004...  Also, there are two in Equador, to the best of my 
knowledge: one in Quito with six participants, and one in Guayaquil 
with six participants.  In addition, I have heard rumors of two other 
exchanges in Panama, and one other in Argentina, one other in Chile, and 
one other in Colombia, all of which would be useful to put to rest, if 
possible.  Since you don't cite your sources for your list of IXPs, and it 
clearly wasn't coming from our directory, I'd be very curious as to where 
your information was coming from, so I can check any discrepancies and 
update our directory where necessary.

All in all, this is an excellent paper, and I'm very happy to see it.  
Please let me know if I or my staff can be of any help in running down 
references or figures.



                                -Bill