I don't criticize to knock the system down. On the contrary, I criticize to perfect the system.Carlos Alberto Pérez
This post has taken several twists and turns.
I started out to write a post commenting on an ETECSA PowerPoint presentation on their plan for home Internet connectivity. The presentation had been leaked by Carlos Alberto Pérez on his blog Chiringa de Cuba on June 23. In addition to some analysis of the plan, I was going to discuss the role of Chinese equipment suppliers, predominantly Huawei.
Then, on June 25, ETECSA
denied the validity of the leaked document, saying it was used only for training. They said the tentative prices shown were incorrect, but did not retract the substance of the presentation, which shows a plan to provide DSL service to some Cuban homes using Chinese equipment.
That denial was followed by the blocking of access to Pérez' blog, presumably because he had published the leaked document.
You can no longer access Pérez' post, but the presentation itself has been posted by several people.
I have put a copy here, and invite people to add comments to it. (As they say, information wants to be free).
I will provide my reactions to the leaked document here and save the reflections on the Chinese role for a second post.
The presentation says ETECSA plans to roll out asymmetric (faster download than upload) DSL service using Chinese equipment in an unspecified number of central offices. As we see in the following leaked slide, they will use
Huawei ME 60 gateways between the phone and IP networks and have ordered 15,000
TP Link TD 8840T modems for homes. I do not know, but it seems reasonable to guess that the digital multiplexers (DSLAMs) installed in the central offices will be from Huawei as well. (I'll get to the question marks later).
The following price slide was included in the presentation, but ETECSA has said this was only a place-holder for training purposes and I will take them at their word -- consider these prices only as possibilities:
These prices may be higher than we eventually see, but there will surely be a significant number of people who cannot afford a DSL connection so we can imagine people sharing accounts and a black market for reselling time.
The following slide differentiates between national and international access, so I presume that the actual prices will take that into account. That would be reasonable since most international access will be over congested satellite links. The slides say nothing about which, if any, international sites will be blocked.
The above slide also differentiates speed levels, times of day and days of the week. I suspect the actual pricing will take time and day into account, but that may or may not be the case for the different speeds that are shown. Varying infrastructure will cause speed differences regardless of price.
Before a home can receive DSL service, the equipment in the central office serving it must be upgraded and a relatively short, high quality phone line must run between the home and its central office. (That is one of the question marks in previous diagram).
Cuba reported 3,882,424 private homes (
2012) and 939,500 residential phone lines. That means around 2.9 million homes would have to be wired before they could have Internet service. The presentation says they will give priority to homes that already have land lines and those belonging to the self-employed. (The former is obvious and the latter interesting).
Cuba reports having 688 central offices (
2013), few of which contain DSL equipment. Most would have to be upgraded in order to provide DSL service.
Once connected, what will be the data transmission speed? The above slide shows asymmetric (down/up) connection speeds ranging from 128/64 to 8,192/768 kb/s. With DSL technology, transmission speed depends upon the distance of a home from its central office and the condition of the copper lines connecting them. These are always best effort numbers -- "up to" the stated speeds.
Let me give an example, I live Los Angeles and Google Maps says I am 1.1 mile from my central office. Verizon offers me two service levels: "high speed" DSL service is .5-1 mb/s and "enhanced" service is from 1.5-3 mb/s, for an extra $10 per month. To be fair, the copper in my neighborhood is 70 years old, but I doubt that many Cuban customers will be able to get 8,192 kb/s.
There is also a slide showing day/night and weekday/weekend traffic patterns. Judging from the y-axis, I am guessing that this is showing international traffic, which is heavy during week days. Before a user logs on, he or she will be able to measure their current connection speed before starting a session and using their hours.
The Internet connection is the second question mark in the previous diagram. What are the connection speeds between the central offices and the Internet? In the US, central offices are connected by high speed fiber, but I know little about Cuba. For example, in Havana, some or all central offices may be connected to a fiber backbone, but what of the link from there to the Internet? Havana is far from the undersea cable landing to the east, so I imagine those links are via congested satellites.
The bottom line is that this is an early step toward modern home connectivity using yesterday's technology and
I hope Cubans are planning to leapfrog today's technology in the long run.
Well, that is a little tea reading from the leaked slides. It is too bad that the situation is so opaque that we have to guess about ETECSA and their plans and it is even worse that they seem to have blocked Pérez' blog. He is an asset, not a threat --
as he has stated "I don't criticize to knock the system down. On the contrary, I criticize to perfect the system."
I think the involvement of Chinese suppliers is more interesting than this leak, and I will take that up in a subsequent post.
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Update 6/29/3025
Ted Henken told me that the problem with accessing Chiringadecuba.com may not have been government blocking but expiration of the domain name, and it seems he was correct.
I did a whois lookup and it turns out the domain expiration date was 2015-06-26. I then checked at the registrar, Name.com, and saw that chiringadecuba.com is not available. It sounds like it may have expired, but they are giving Perez a grace period within which to re-activate it. Since he would not have a US credit card, there may be some difficulty with that.
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Update 6/29/2015
Chiringadecuba.com is online again and the expiration date has been extended till next year. My apologies to ETECSA for fearing that they may have blocked access.
