I Upgraded to 10mb service last thursday, however i did have a problem with my nic so was unable to test (Marvel nic kept flooding my lan with traffic and router would lock up if i downloaded more than one file at a time).
Today i replaced the nic and this resolved the issue i had. I set off several downloads and all looked great, all of a sudden internet access died. the 1st time i assumed it was the original fault, and powered off the mains adapter (shared with router and cable modem). The second time I noticed this fault was different i could still access the router config pages (never could with original issue). Released IP address from the cable modem and it would then not renew. reset only the cable modem this time and all ok.
10-15 mins later same problem. Repeated reset and again all ok for another 10-15 mins. This kept happening and i tried replacing the router with my old (non wireless one) and connecting the pc and then my laptop directly to the cable modem, still with the same problem, i then found this forum thread. While reading from the 1st page to the last my modem locked up another 3 times
I have tried limiting the speed to aprox 2mb, and this did have a slight effect as i got 20-25 mins.
Anyway as while i was writing this it happened again, so i left the fault on the modem and i spoke to NTL CS. I told the girl i had the problem and that i replaced the router and swapped pc's, she got me to reboot the router and did a remote test and this did show up a fault. Engineer now booked to replace cable modem on Friday (6pm - 8pm), oh i also requested they bring a 250 cable modem.
I have to admit i was a little surprised that this was so easy to arrange, i was expecting a big argument, and them to want to perform loads of tests. Could it possibly be that NTL support are aware of this issue now? OR have an additional test they perform on the cable modem?
I have just lowered the download speed again to 1mb hopefully this will stay connected. and i will keep it like this till Friday.
Some tech details from the cable modem:
Type : Ambit ETH/USB Combo Cable Modem
Cable modem : Ambit Cable Modem
IP address : 10.232.118.93
Downstream Receive Power Level : 8.61 dBmv
Downstream SNR : 35.62 dB
Upstream Transmit Power Level : 34.00 dBmv
Upstream Frequency : 36800000 Hz
Upstream Transmit Power Level : 34.00 dBmv
ntlhm120_ntl0003.cpr