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FTTC Trial - 3 Month Status Update

phil_o99
Dabbler
Posts: 18
Registered: 04-08-2007

FTTC Trial - 3 Month Status Update

It's now three months since the FTTC upgrade, and speeds have been relatively stable since installation at approx 13 Mbit/sec down and 2 Mbit/sec up until last week when BBC iPlayer started to exhibit low bandwidth symptoms - jumping picture, dropped sound track, timer symbol, etc.
A speed check indicated that the link had deteriorated to 500Kbit/sec down, 2 Mbit/sec up.
Action taken:
  - A power-off reset of the Netgear router alone resulted in a complete failure to re-establish a connection.
  - A power-off reset of the BT modem restored the link to its earlier 13 down/2 up performance level.
Could it be that the BT modem adaptive equaliser adjusts over time to a point from which it cannot recover without a forced reset?

4 REPLIES
timw2000
Dabbler
Posts: 23
Registered: 29-11-2010

Re: FTTC Trial - 3 Month Status Update

My Speed is typically 37M Down an 8M Up  Smiley
Sunday morning, I was getting 600K Down and I can't remember the up, but it could have been 6M.
I power cycled my VSDL modem and all was fixed. This is my 2nd Modem after my 1st failed leaving me with internet for 8 days (unable to obtain a DSL sync)
Having come from a Virgin area where my modem worked without any issue for years this is starting to concern me...
Tim.
phil_o99
Dabbler
Posts: 18
Registered: 04-08-2007

Re: FTTC Trial - 3 Month Status Update

Hi Tim,
Wow! 37 down, 8 up - I'm impressed! You must be close to the cab.
Strangely, this is my second modem as the first one was swapped out during earlier investigations into the low synch rate. The problem was eventually tracked down to a short section of aluminium cable, so there was probably nothing wrong with the original modem.
As BT won't replace the aluminium cable section on the grounds of cost and disruption, 13 down, 2 up is the best I can hope for until something catastrophic happens to the dodgy cable.
I don't know how immature the design of the BT VDSL modem is, or indeed whether it is a rebadged standard component. The tendency of the modem to lock up when faced with extreme line characteristics suggests that the firmware is not yet fully optimised. The Virgin product has been on the market for a good while and has probably been used by other service providers too.
I wonder - are PlusNet forwarding the comments and observations made in the forum to BT?
timw2000
Dabbler
Posts: 23
Registered: 29-11-2010

Re: FTTC Trial - 3 Month Status Update

Hi Phil,
Hmmm, these modems do not sound the most robust, reading other forum posts here sounds like more people are having issues with theirs too.
I'm actually about 1km from my cabinet so I'm very happy with my speeds, must be nice copper cable all the way! I struggled to get 1.5M on the ADSL Max service so FTTC is a god send, although +Net need to offer more bandwidth and better traffic management to really get benefit!
Interestingly on my 1st modem, my speed started out at 37M but after a few days seemed to settle at about 29 to 30, this new one is solid at 37 apart from the 1 reboot required so far....
Let's hope +Net feedback to BT these modem issues.
Tim.
knowdice
Grafter
Posts: 328
Registered: 25-04-2008

Re: FTTC Trial - 3 Month Status Update

I have been seeing a reduction of my download speed, but this seems to be because I schedule my router Draytek 2130n to disable it's WAN interface over night (don't ask why...)
But when I check speed in the morning I have seen it as low as 500kbs download but always a reasonable 7-8mbs upload (I'm about 600m from my cabinet).
Re-booting the BT modem and router always restores speed Ok but why should it slow down just because I'm not PPPoE authenticated over night?