internet adventures part II
hi there!
well.. I finally have some good news: internet is working and this time completely.
after the last post, I spent the morning searching information on what had happened to me and I found a more advanced forum of people who had been able to go past the "set adsl open dmt" issue. The funny part, I found out, is that most of those people had also observed the large data burst problem (though they referred to it as the problem of "sites with large forms"). Someone suggested that a MTU of 576 should work best with the PPP mode we are using. He apparently found that information on wikipedia. I tried it, and in fact some pages started to work (gmail for instance). But not all.
So finally I tried to configure for the second time the Comtrend ADSL modem (software version A101-220TLF-C35) of telefonica that a friend let me. I searched for the user/pass (which is 1234/1234) and entered the parameters. At first it didn't work but with some additional modifications to the standard configuration it did. These changes consisted in:
1) enable G.DMT modulation together with ADSL2+ and T1.413
2) select "outer pair" instead of "inner pair" as the phone line pair
the first change was pretty obvious as that is what I had been told with the previous modem. However, the second was more sort of luck. Telefonica distributes its modems with a couple of microfilters. However my installation at home, which was done about 5 years ago does not use microfilters and instead relies on a splitter at the entry point. I don't know if there is any relation between these but this fact made me change to "outer pair". maybe I should take a look at this issue more closely :)
well, the important thing is that I can work without problems now. Some day it seems that ya.com will send the new modem and at that time I'll have some new adventures to tell :)
ok.. hasta la vista then!
-- izzu
well.. I finally have some good news: internet is working and this time completely.
after the last post, I spent the morning searching information on what had happened to me and I found a more advanced forum of people who had been able to go past the "set adsl open dmt" issue. The funny part, I found out, is that most of those people had also observed the large data burst problem (though they referred to it as the problem of "sites with large forms"). Someone suggested that a MTU of 576 should work best with the PPP mode we are using. He apparently found that information on wikipedia. I tried it, and in fact some pages started to work (gmail for instance). But not all.
So finally I tried to configure for the second time the Comtrend ADSL modem (software version A101-220TLF-C35) of telefonica that a friend let me. I searched for the user/pass (which is 1234/1234) and entered the parameters. At first it didn't work but with some additional modifications to the standard configuration it did. These changes consisted in:
1) enable G.DMT modulation together with ADSL2+ and T1.413
2) select "outer pair" instead of "inner pair" as the phone line pair
the first change was pretty obvious as that is what I had been told with the previous modem. However, the second was more sort of luck. Telefonica distributes its modems with a couple of microfilters. However my installation at home, which was done about 5 years ago does not use microfilters and instead relies on a splitter at the entry point. I don't know if there is any relation between these but this fact made me change to "outer pair". maybe I should take a look at this issue more closely :)
well, the important thing is that I can work without problems now. Some day it seems that ya.com will send the new modem and at that time I'll have some new adventures to tell :)
ok.. hasta la vista then!
-- izzu
posted by miki at
8:44 AM
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