Is interleave on as standard/default on Zen.

No they dont outsource it to India.
Gary

My recollection if memory serves me right was that DSL Max has features (Target margin and interleaving) which are better ways of handling interference. However it is more susceptible to existing CPE, wiring, filtering issues that might already be present but not impacting on lower band width fixed rate lines.

Interleaving itself is a standard feature of DSLAMs and is quite simply error correction, which can be enabled on any line to improve its overall performance and stability. Interleaving introduces powerful error correction algorithms, which in some cases

It's set as "Auto" - therefore it will be applied automatically if BT's DLM systems determine it's needed.

regards,
Phil.

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I'll bet there is a setting on BT's DSLAM which controls Fast/Interleave mode. There would be an ssh and possibly snmp interface to that. Easily scriptable, they could have a database which schedules requests coming from ISPs, and auto-execute a certain number of requests per hour.

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You know, this sort of comment from someone who claims to be an "IT Infrastructure Engineer" really worries me. Do you seriously think that it is "good practice" to allow end-users to interact with key infrastructure elements in this way?

No doubt you'll be proposing that companies deploy firewalls that allow users to open ports as and when they like, or a system that allows your average man in the street to change the routing tables for an entire ISP just because they think their ping is a few ms too high.

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The only problem I can see is that sometimes a customer might disconnect themselves by moving to fast mode.

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If this is the only problem you can forsee, I suggest you look again....

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Anyone know if they outsource the DSLAM configuraiton work to India?

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And how exactly is such a xenophobic remark necessary or relevant to whether end-users could or should be allowed to modify their interleave settings? Are you trying to suggest that staff based in India are any less capable of undertaking configuration work on DSLAMs? If such work were outsourced to a country such as Peru, would that make any difference?

Thanks

It took about 2 days after emailing the request for the interleaving to be switched off.
Sync seems to b e stable at about the same speed (~7.5Mb/S), and ping times to the zen gateway have gone down to 13ms (from SE England).
I think that I can detect faster loading of some web pages (eg where there are 100s of thumbnail jpgs).

It makes me think that when interleaving is set to auto, it will switch on automatically, but not witch off automatically - can anyone contradict that?

Same here. I had to request it be switched off too but alas, I could only remain happy for about a month. After about a month with no disconnections at my end, a very stable ~760KB/s downstream, I checked my router stats to see how many uncorrected blocks I had which turned out to be roughly 0.4% of all blocks received. Alas, BT doesn't like this apparantly and my downstream has taken a dive from that lofty ~750KB/s to 600KB/s and decreasing every other day now it would appear.

Enjoy it while you can I guess :/.

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my downstream has taken a dive from that lofty ~750KB/s to 600KB/s and decreasing every other day now it would appear.

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Sounds strange.. Is your SNR going up or down. If down, it would seem that your line or router is deteriorating.

Up. Was 9dB, now 12.5dB.