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raymie67
Expert
825 Views
Message 1 of 5

IP profile update methods

I posted a similar thread a while ago but this is an updated one and without the mess of the last thread re discussions.

 

if this helps please rate the message with a star so I know I am not wasting my time.

 

 

 

You will be on one and only one of the 3 methods although there are some rare exceptions such as fixed rate lines and banded rates. For banded rates due to line issues I have been informed that it can take 3 days to sort itself out if the line remains ok. Additionally for new or reset lines the bedding in period varies between 3-10 days and than can effect the profile used.

 

 

1 88.2% method.

 

This is the newest method and basically removes the concept of a profile as such as matches similar other schemes in place by other providers. Your 'profile' is set to 88.2% of your downstream sync rate (which allows for the overheads needed that are contained wiithin the traffic). Setting change is made with a change in sync speed.

 

This method is only available on exhanges that have been updated to CN21 and there are no current plans to change this. Not all CN21 exchanges may yet have this method but eventually those that don't (Fujitsu MSANS) will get an update to implement it.

 

Some lines may have this method, have the new rate applied but then be moved down to the nearest IP profile on the old method a while after connecting until some internal BT software is updated.

 

 

If you run a BT speedcheck it will tell you your IP profile, if it is not a nice round value ending on 0 or 5 then you are on this method already, otherwise your profile should fit one of the values in the table further down (unless your speed is greater than I cater for [posts limited to 20,000 chars])

 

 

2 Oldest method

 

Decreases in profile take up to 75 minutes to apply, increases can take up to 3 days from the time of a higher sync.

 

IP profile value depends on your sync speed.

 

 

Sync speed (incr 32kb   stages) IP profile 
From To
   
160 kbps256   kbps135
288 kbps384   kbps250
416 kbps544   kbps350
576 kbps832   kbps500
864 kbps1120   kbps750
1152 kbps1408   kbps1000
1440 kbps1696   kbps1250
1728 kbps1984   kbps1500
2016 kbps2240   kbps1750
2272 kbps2816   kbps2000
2848 kbps3392   kbps2500
3424 kbps3968   kbps3000
4000 kbps4512   kbps3500

 

 

3 Adaptive Max

 

Adaptive max is available on some exhanges and is an attempt to speed up the resets for those affected without resetting it too quickly and causing more issues if there is a line issue.

 

Change depends on the lowest rate that caused a decrease and the new profile that your current sync would fall within. (decreases are within 75 minutes, the table is for increases only)

 

The table for the ADSL2+ rates are as follows

 

01352503505007501000125015001750200025003000350040004500500055006000650070007150
135 1212121212121212121212121212121212121212
250  24121212121212121212121212121212121212
350   241212121212121212121212121212121212
500    2412121212121212121212121212121212
750     24121212121212121212121212121212
1000      242412121212121212121212121212
1250       4824241212121212121212121212
1500        72241212121212121212121212
1750         722412121212121212121212
2000          2424121212121212121212
2500           48242412121212121212
3000            722424121212121212
3500             7224242412121212
4000              72242424241212
4500               724824242424
5000                9648242424
5500                 96482424
6000                  1207248
6500                   12096
7000                    120

 

Old rate is down the side and new rate along the top, the resultant value is the number of hours for a change to take place.

 

This is the minimum time and it seems that it may take a few hours longer than expected, probably because I suspect that the process to check/reset the values only runs periodically and so you should probably allow up to 2 hours or so extra.

 

On my exchange (New Deer) I have found that the change roughly takes place at either 20 minutes or 50 minutes past the hour and at no other time so it seems that the process probably runs twice per hour. The times at your exchange are likely to vary.

 

I find that under adaptive max my profile still on occassion sticks, when this happens it seems to reset itself often after 3 or 3.5 days, if not reset by them it does not reset without needing BT to arrange it.

 

 

 

 

 

 

 

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4 REPLIES 4
raymie67
Expert
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Message 2 of 5

Re: IP profile update methods

Expanded table on profile values for adsl2+ (could not be added to above due to size of post limits)

 

Sync speed (incr 32kb   stages) IP profile bRAS ATM bit rate profile Maximum Throughput speed
From To(AAL5 Payload)
     
160 kbps256   kbps135138Up   to 135 kbps
288 kbps384   kbps250256Up   to 0.25 Mbps
416 kbps544   kbps350370Up   to 0.35 Mbps
576 kbps832   kbps500512Up   to 0.5 Mbps
864 kbps1120   kbps750768Up   to 0.75 Mbps
1152 kbps1408   kbps10001024Up   to 1 Mbps
1440 kbps1696   kbps12501280Up   to1.25 Mbps
1728 kbps1984   kbps15001536Up   to 1.5 Mbps
2016 kbps2240   kbps17501792Up   to 1.75 Mbps
2272 kbps2816   kbps20002048Up   to 2 Mbps
2848 kbps3392   kbps25002560Up   to 2.5 Mbps
3424 kbps3968   kbps30003072Up   to 3 Mbps
4000 kbps4512   kbps35003584Up   to 3.5 Mbps
4544 kbps5088   kbps40004096Up   to 4 Mbps
5120 kbps5664   kbps45004608Up   to 4.5 Mbps
5696 kbps6208   kbps50005120Up   to 5 Mbps
6240 kbps6784   kbps55005632Up   to 5.5 Mbps
6816 kbps7360   kbps60006144Up   to 6 Mbps
7392 kbps7936   kbps65006656Up   to 6.5 Mbps
7968 kbps8096   kbps70007168Up   to 7 Mbps
8128 kbps9087   kbps71507320Up   to 7.15 Mbps
     
WBC ADSL 2+ Profiles
9088 kbps10207   kbps80008192Up   to 8 Mbps
10208 kbps11359   kbps90009216Up   to 9 Mbps
11360 kbps12479   kbps1000010240Up   to 10 Mbps
12480 kbps13631   kbps1100011264Up   to 11 Mbps
13632 kbps14751   kbps1200012288Up   to 12 Mbps
14752 kbps15903   kbps1300013312Up   to 13 Mbps
15904 kbps17023   kbps1400014336Up   to 14 Mbps
17024 kbps18175   kbps1500015360Up   to 15 Mbps
18176 kbps19295   kbps1600016384Up   to 16 Mbps
19296 kbps20415   kbps1700017408Up   to 17 Mbps
20416 kbps21567   kbps1800018432Up   to 18 Mbps
21568 kbps22687   kbps1900019456Up   to 19 Mbps
22688 kbps23839   kbps2000020480Up   to 20 Mbps
23840 kbps-2100021504Up   to 21 Mbps
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raymie67
Expert
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Message 3 of 5

Re: IP profile update methods

Adaptive max liits (from Kitz web site)

 

From To Time     
       
250%3100%4   hours    
40%250%12 hours    
20%40%24   hours    
15%20%48   hours    
10%15%72   hours    
8%10%96   hours    
0%8%120 hours    
       

 

Read more:   http://www.kitz.co.uk/adsl/IPprofile.htm#ixzz1OrzFvgET

Read   more:   http://www.kitz.co.uk/adsl/IPprofile.htm#Adaptive_Max_Logic#ixzz1P4iWDHHM

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raymie67
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Message 4 of 5

Re: IP profile update methods

Adaptive max percentage calculation.

 

In case your speeds are outwith my table the calculation is as follows.

 

 

( new-profile-value minus old-profile-value) / new-profile-value and then multiply by 100.

 

It is important to note that it is the profile values used and not the sync rates.

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raymie67
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Message 5 of 5

Re: IP profile update methods

 

How to tell if you are on adaptive max or the old method

 

As far as I know there is no way to tell directly, I have yet to find anyone at BT who can say for sure.

 

At one stage a figure of 40% of lines was quoted for adaptive max but this is now widely out of date, I know that my exchange has been updated since then and with Infinity a large number of people now don't use IP profiles at all so the percantage of lilnes on adaptive max instead of the old method is by default now higher probably.

 

The only way I know to tell is by observation, if you run the bt speedtester every now and then when under adaptive max you would expect a speed change and you find it has changed then you know you are on that method but please bear in mind that a change due in 12 hours could take nearer 14-15 hours to be appllied.

 

It is also vital that you know you have not had a lower sync in the meantime, if you sync below the targer profile band then the count will restart.

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