Thank you - I hadn't known what WBC and WBMC were.
I certainly wouldn't be able to tell from that BT test which it was - glad you can tell!

Looking at my line data page, it states:
'Your current maximum download speed is 4573Kbps.
Your current line technology is WBMC.'
The page must need updating. The speed mentioned is almost what was achieved on the BT test.

When you say 'simple migration of service' - is that the new router?

I just read the ISP's page regarding 21CN and they say it's a two stage process - first step causes a brief disconnect (I had one on 13th) - second step is that the customer must request it from the upgrade section to have it implemented.
Perhaps they just did it anyway.

It hasn't had a detrimental effect as some people find. It's obviously far from the 'up to 20mbps' service sadly, but BT does say there that my max achievable is 7150.
Whatever, it slowed again late tonight a bit, but not caused any problems, so things do seem far better

In reply to a post by TrishaH:

It's obviously far from the 'up to 20mbps' service sadly,

"Up to" are the operative words! It all mainly depends on your line length.

What are your router stats?

A new router is not a "migration of service'". That would be the change of ISP that you did on 17 Nov, in this case.

Edited by XRaySpeX (Sat 17-Dec-11 00:58:06)

Thank you - Yes, 'Up to' is just that

Router stats ADSL status:
Parameters
DSP Firmware Version A2pB025f.d22k
DMT Status No Defect
Operational Mode G.DMT
Upstream 448
Downstream 5632
SNR Margin(Upstream) 23.0
SNR Margin(Downstream) 5.7
Line Attenuation(Upstream) 23.0
Line Attenuation(Downstream) 44.0

Device information:
Model Name BiPAC 7800N
Host Name home.gateway
System Up-Time 3 Day(s) 7 Hour(s)
Current Time Sat Dec 17 01:03:59 2011
Hardware Version Annex A
Software Version 1.06d
MAC Address
LAN IPv6 Address

Re migration part - I thought that but RobertoS mentioned 12th Dec info along with 'simple migration'.

Edited by deleted (Sat 17-Dec-11 10:46:05)

You're not on WBC yet. You're still running ADSL Max, tho' you might be on something called IPStream Connect (IPSC).

Even so, you should be getting at least 6 Meg Sync.

I should blank out remove completely your MAC & LAN Addresses.

Thank you - Addresses removed!

Perhaps the speed will improve when we get the socket moved/replaced. The new router has improved it a bit.
Currently have an old, small master socket upstairs and computer on an extension.

Latest speed tests - the one in the sig is old..

I top out at 330KB/sec = around 2.6 mbit/s

Edit, ah, there we go

Edited by Stoo (Sat 17-Dec-11 11:14:59)

In reply to a post by XRaySpeX:

You're not on WBC yet. You're still running ADSL Max, tho' you might be on something called IPStream Connect (IPSC).

Nope - the information we have been given is a WBMC connection, which for the purpose of this discussion is the same as WBC, ie 21CN. The G.DMT does, I agree, indicate an ADSL "profile",( not to be confused with IP Profile), is in place, limiting the speeds to 8128/448kbps.

A dog is an animal, but an animal is not necessarily a dog. ADSL Max was G.DMT, but G.DMT is not necessarily ADSL Max.

The WBMC is borne out by the IP Profile from the BT test - that is only possible on WBC/WBMC connections - and the line rate shown in the Zen control panel. IPSC is not such a connection. (The new profiling runs on WBC MSANs, and IPSC is for getting 20CN DSLAM connections through to a WBC/WBMC MSIL).

In conjunction with the earlier posts about Zen support and the upgrade request, I think that will be what he is talking about. Switching to G.992.5 instead of G.DMT.

Re the connection speed itself, I agree it is low for the attenuation. We need to see what happens after the NTE5 is installed.

@Trishah - as XRaySpeX says, by "simple migration" I meant the move from your previous ISP to Zen.

In reply to a post by RobertoS:

The WBMC is borne out by the IP Profile from the BT test - that is only possible on WBC/WBMC connections

As a matter of interest, what makes it WBMC as opposed to WBC? Is it because another ISP other than BT, i.e. Zen, is running off BTw's WBC?

In reply to a post by RobertoS:

Re the connection speed itself, I agree it is low for the attenuation. We need to see what happens after the NTE5 is installed.

@Trishah - as XRaySpeX says, by "simple migration" I meant the move from your previous ISP to Zen.

OK - migration was 17th November.
As you say, let's see what happens after 29th when I get a 'proper' socket.

In reply to a post by XRaySpeX:

In reply to a post by RobertoS:

The WBMC is borne out by the IP Profile from the BT test - that is only possible on WBC/WBMC connections

As a matter of interest, what makes it WBMC as opposed to WBC? Is it because another ISP other than BT, i.e. Zen, is running off BTw's WBC?

WBC has user traffic hard-routed to whichever one of the 20 WBC nodes BT decide. This hard connection is at the MSAN in the exchange, and different MSANs in the same exchange do sometimes route to different nodes, according to the data/map once published by ADSL24. (I assume BT put the mockers on that). ISPs using WBC have to arrange to collect their traffic from every one of those nodes.

WBMC adds routing within the underlying WBC network, so that an ISP may opt instead to collect their traffic, for all customers, at just one of those 20 nodes. It was originally suggested that they may be able to use a few but the initial implementation was only one. I don't know the current status of that. For smaller ISPs WBMC is clearly to be preferred on cost grounds. Twenty MSILs all over the country with backhaul from each is hugely expensive. I only know of Entanet doing it.