Cuba USA
A colleague in Cuba ran traceroute from a computer on a dial up link in Havana to several destinations in Cuba, Venezuela and the US. The following table shows the round trip latency time for three tests to each destination:
As you see, the international connections are very slow. It would be difficult, if not impossible, to use a modern Web site at any of those locations. Only the third test on the last line (to the US) seems to be using the ALBA-1 cable one-way.
Not only are the times slow, the variance to the same location is very high. Consider again the last line -- three tests resulted in three very different times. Even the variance within Cuba is high.
I cannot explain this -- some may be due to problems with my colleague's computer or Internet connection -- but hopefully we will see improvement soon.
If others run tests from Cuba and get different results, let us know (in confidence).
- Has The Alba-1 Undersea Cable Changed Anything?
In January, I posted a note about a blog post by Renesys analyst Doug Madory showing that Cuba had begun testing the ALBA-1 undersea cable. Madory's data shows the round trip "ping" times for packets traveling between Cuba and four other cities. ...
- Renesys Detects Some Two-way Cable Traffic
Click to enlargeAt exactly 14:01 UTC Tuesday (09:01 local time), Renesys saw a third mode in their latency tests. In this plot, you can see the original pure-satellite mode (A), the apparent one way satellite mode we mentioned in an earlier post (B),...
- The Internet Route From Cuba To Google
The Internet is, as its name implies, a network of networks. A data packet is sent from a particular computer on one network across the Internet to the receiving computer on another network. As the packet moves from network to network, it goes through...
- Ping Time From Cuba To The Us
Ping is a simple utility program that comes with every Mac or Windows computer. Ping records the time it takes to send a data packet across the Internet and to receive an acknowledgement of receipt from the remote computer. A colleague in Cuba recently...
- A Conversation With A Cuban Telecommunication Engineer
I asked for input and test runs from people in Cuba in a recent post, and I've had an interesting email conversation with a telecommunication engineer who says he has never worked in that field. He asked me not to share his name or email address....
Cuba USA
Connectivity remains slow and variable
A colleague in Cuba ran traceroute from a computer on a dial up link in Havana to several destinations in Cuba, Venezuela and the US. The following table shows the round trip latency time for three tests to each destination:
Not only are the times slow, the variance to the same location is very high. Consider again the last line -- three tests resulted in three very different times. Even the variance within Cuba is high.
I cannot explain this -- some may be due to problems with my colleague's computer or Internet connection -- but hopefully we will see improvement soon.
If others run tests from Cuba and get different results, let us know (in confidence).
- Has The Alba-1 Undersea Cable Changed Anything?
In January, I posted a note about a blog post by Renesys analyst Doug Madory showing that Cuba had begun testing the ALBA-1 undersea cable. Madory's data shows the round trip "ping" times for packets traveling between Cuba and four other cities. ...
- Renesys Detects Some Two-way Cable Traffic
Click to enlargeAt exactly 14:01 UTC Tuesday (09:01 local time), Renesys saw a third mode in their latency tests. In this plot, you can see the original pure-satellite mode (A), the apparent one way satellite mode we mentioned in an earlier post (B),...
- The Internet Route From Cuba To Google
The Internet is, as its name implies, a network of networks. A data packet is sent from a particular computer on one network across the Internet to the receiving computer on another network. As the packet moves from network to network, it goes through...
- Ping Time From Cuba To The Us
Ping is a simple utility program that comes with every Mac or Windows computer. Ping records the time it takes to send a data packet across the Internet and to receive an acknowledgement of receipt from the remote computer. A colleague in Cuba recently...
- A Conversation With A Cuban Telecommunication Engineer
I asked for input and test runs from people in Cuba in a recent post, and I've had an interesting email conversation with a telecommunication engineer who says he has never worked in that field. He asked me not to share his name or email address....