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DrAwesome · 06-07-2004, 17:30

BT Wholesale have announced the next 150 exchanges to be enabled for their SDSL products.

What is SDSL, some of you may be asking?
SDSL stands for Symmetric Digital Subscriber Line. SDSL needs just one twisted pair (line), whereas some other earlier DSL standards needed 2, or even 3 pairs. In addition, it is useful to remember that this standard is symmetric, ie, the maximum data rate both "upstream" & "downstream" is the same. Compare this to ADSL (which also needs just one line!).

Where ADSL utilizes unoccupied frequencies & averts conflict with analog voice frequencies, SDSL takes over the whole line. SDSL eliminates analog voice capabilities in favour of full-duplex data transmission. No splitter, no analog voice-nothing but data. As a decent alternative to T1, SDSL has gotten a fair amount of attention from Competitive Local Exchange Carriers. :O)

SDSL & Voice Over Data
SDSL is a low latency technology & is ideally suited for Voice over Data applications such as Voice over IP & Voice over ATM.

SDSL can also transport a mix of traditional 64Kbps voice channels & data. This enables SDSL to address the business needs of both voice & data connectivity.

link to more SDSL Q&A's

SDSL can be very useful for sending very large emails, voice over IP, & video conferencing, the subscription price is high.

Its not known whether BT Wholesale are using the pre-registration scheme, as they use for ADSL also there are no set trigger levels.

ATM Eclipse is the only ADSL isp to my knowlege that has been gathering/collecting SDSL registrations but it has been enough to kick BT into motion to update their exchanges (below)

Exchange Name,County,RDA,SDSL Ready for Service

Derby,Derbyshire,East Midlands,To be confirmed
Montfort,Leicestershire,East Midlands,30/11/2004
Hinckley,Leicestershire,East Midlands,30/11/2004
Loughborough,Leicestershire,East Midlands,To be confirmed
Leicester,Leicestershire,East Midlands,To be confirmed
Northampton,Northamptonshire,East Midlands,To be confirmed
Kettering,Northamptonshire,East Midlands,To be confirmed
Duston,Northamptonshire,East Midlands,To be confirmed
Mansfield,Nottinghamshire,East Midlands,To be confirmed
Bedford,Bedfordshire,East of England,30/07/2004
Luton,Bedfordshire,East of England,To be confirmed
Dunstable,Bedfordshire,East of England,To be confirmed
Cambridge,Cambridgeshire,East of England,30/11/2004
Peterborough,Cambridgeshire,East of England,To be confirmed
Huntingdon,Cambridgeshire,East of England,To be confirmed
Brentwood,Essex,East of England,30/11/2004
Southend,Essex,East of England,To be confirmed
Colchester,Essex,East of England,To be confirmed
Chelmsford,Essex,East of England,To be confirmed
St Albans,Hertfordshire,East of England,30/07/2004
Stevenage,Hertfordshire,East of England,To be confirmed
Hemel Hempstead,Hertfordshire,East of England,To be confirmed
Watford,Hertfordshire,East of England,To be confirmed
Norwich North,Norfolk,East of England,To be confirmed
Norwich City,Norfolk,East of England,To be confirmed
Kings Lynn,Norfolk,East of England,To be confirmed
Bury St Edmunds,Suffolk,East of England,30/11/2004
Ipswich,Suffolk,East of England,To be confirmed
Earls Court,Greater London,London,30/07/2004
Chelsea,Greater London,London,30/07/2004
Uxbridge,Greater London,London,30/07/2004
Skyport,Greater London,London,30/07/2004
Hendon,Greater London,London,30/07/2004
Golders Green,Greater London,London,30/07/2004
Edgeware,Greater London,London,30/07/2004
Colindale,Greater London,London,30/07/2004
Chiswick,Greater London,London,30/07/2004
Acton,Greater London,London,30/07/2004
Enfield,Greater London,London,30/07/2004
Bowes Park,Greater London,London,30/07/2004
Barking,Greater London,London,30/07/2004
Barnet,Greater London,London,30/07/2004
Walworth,Greater London,London,30/07/2004
Lower Holloway,Greater London,London,30/07/2004
Woolwich,Greater London,London,30/11/2004
Lee Green,Greater London,London,30/11/2004
Greenwich,Greater London,London,30/11/2004
Feltham,Greater London,London,To be confirmed
Sidcup,Greater London,London,To be confirmed
Farnbourough,Greater London,London,To be confirmed
Ponders End,Greater London,London,To be confirmed
North Finchley,Greater London,London,To be confirmed
Edmonton,Greater London,London,To be confirmed
Cricklewood,Greater London,London,To be confirmed
Chester South,Cheshire,North West,30/11/2004
Macclesfield,Cheshire,North West,30/11/2004
Warrington,Cheshire,North West,30/11/2004
Chester North,Cheshire,North West,To be confirmed
Chester Central,Cheshire,North West,To be confirmed
Manchester Moss Side,Greater Manchester,North West,30/07/2004
Manchester Mercury,Greater Manchester,North West,30/07/2004
Wigan,Greater Manchester,North West,To be confirmed
Preston,Lancashire,North West,30/11/2004
Lancaster,Lancashire,North West,30/11/2004
Burnley,Lancashire,North West,30/11/2004
Blackburn,Lancashire,North West,30/11/2004
Stockton,Cleveland,One North East,30/11/2004
Middlesborough,Cleveland,One North East,30/11/2004
Durham,Durham,One North East,To be confirmed
Sunderland,Tyne & Wear,One North East,30/11/2004
Newcastle,Tyne & Wear,One North East,30/11/2004
Aberdeen Denburn,Grampian,Scotland,30/11/2004
Edinburgh Newington,Lothian,Scotland,30/07/2004
Edinburgh Donaldson,Lothian,Scotland,To be confirmed
Hamilton,Strathclyde,Scotland,30/07/2004
Eaglesham,Strathclyde,Scotland,30/07/2004
Clydebank,Strathclyde,Scotland,30/07/2004
Dunning,Tayside,Scotland,30/11/2004
Slough Main,Berkshire,South East,30/07/2004
Reading Central,Berkshire,South East,30/07/2004
Bracknell,Berkshire,South East,30/07/2004
Reading Tilehurst,Berkshire,South East,To be confirmed
Reading South,Berkshire,South East,To be confirmed
Newbury,Berkshire,South East,To be confirmed
Maidenhead,Berkshire,South East,To be confirmed
Reading Earley,Berkshire,South East,To be confirmed
Milton Keynes,Buckinghamshire,South East,30/11/2004
Aylesbury,Buckinghamshire,South East,30/11/2004
High Wycombe,Buckinghamshire,South East,To be confirmed
Bradwell Abbey,Buckinghamshire,South East,To be confirmed
Hove,East Sussex,South East,30/11/2004
Eastbourne,East Sussex,South East,To be confirmed
Hastings,East Sussex,South East,To be confirmed
Portsmouth North End,Hampshire,South East,30/07/2004
Cosham,Hampshire,South East,30/07/2004
Basingstoke,Hampshire,South East,To be confirmed
Aldershot,Hampshire,South East,To be confirmed
Winchester,Hampshire,South East,To be confirmed
Southampton,Hampshire,South East,To be confirmed
Andover,Hampshire,South East,To be confirmed
Portsmouth,Hampshire,South East,To be confirmed
Maidstone,Kent,South East,30/11/2004
Tunbridge Wells,Kent,South East,To be confirmed
Gravesend,Kent,South East,To be confirmed
Canterbury,Kent,South East,
Ashford,Kent,South East,To be confirmed
Chatham (Medway),Kent,South East,To be confirmed
Oxford,Oxfordshire,South East,To be confirmed
Banbury,Oxfordshire,South East,To be confirmed
Guildford,Surrey,South East,30/07/2004
Woking,Surrey,South East,To be confirmed
Camberley,Surrey,South East,To be confirmed
Staines,Surrey,South East,To be confirmed
Leatherhead,Surrey,South East,To be confirmed
Byfleet,Surrey,South East,To be confirmed
Worthing Central,West Sussex,South East,To be confirmed
Horsham Carfax,West Sussex,South East,To be confirmed
Bristol West,Avon,South West,To be confirmed
Bristol Redcliffe,Avon,South West,To be confirmed
Bristol North,Avon,South West,To be confirmed
Bath Kingsmead,Avon,South West,To be confirmed
Sowton,Devon,South West,To be confirmed
Plymouth,Devon,South West,To be confirmed
Exeter,Devon,South West,To be confirmed
Gloucester,Gloucestershire,South West,To be confirmed
Cheltenham,Gloucestershire,South West,To be confirmed
Swindon,Wiltshire,South West,30/11/2004
Salisbury,Wiltshire,South West,To be confirmed
Newport,Gwent,Wales,To be confirmed
Bridgend,Mid Glamorgan,Wales,To be confirmed
Roath (Cardiff),South Glamorgan,Wales,To be confirmed
Cardiff Central,South Glamorgan,Wales,To be confirmed
Hereford,Hereford & Worcester,West Midlands,30/11/2004
Worcester,Hereford & Worcester,West Midlands,30/11/2004
Kidderminster,Hereford & Worcester,West Midlands,30/11/2004
Shrewsbury,Shropshire,West Midlands,30/11/2004
Stoke Trinity,Staffordshire,West Midlands,To be confirmed
Stafford,Staffordshire,West Midlands,To be confirmed
Burton On Trent,Staffordshire,West Midlands,To be confirmed
Warwick,Warwickshire,West Midlands,30/07/2004
Solihull,Warwickshire,West Midlands,30/07/2004
Rugby,Warwickshire,West Midlands,30/07/2004
Leamington Spa,Warwickshire,West Midlands,30/07/2004
Stratford Upon Avon,Warwickshire,West Midlands,30/11/2004
Scunthorpe,Humberside,Yorkshire Forward,To be confirmed
Scarborough,North Yorkshire,Yorkshire Forward,30/11/2004
Harrogate,North Yorkshire,Yorkshire Forward,To be confirmed
Barnsley,North Yorkshire,Yorkshire Forward,To be confirmed
Huddersfield,West Yorkshire,Yorkshire Forward,30/11/2004
Halifax,West Yorkshire,Yorkshire Forward,30/11/2004

06-07-2004, 17:30	#73
DrAwesome Inactive Join Date: Jun 2003 Location: I dwell within bricks & morta Posts: 2,268	Re: DrAwesome's Useful ADSL Info & News BT Wholesale have announced the next 150 exchanges to be enabled for their SDSL products. What is SDSL, some of you may be asking? SDSL stands for Symmetric Digital Subscriber Line. SDSL needs just one twisted pair (line), whereas some other earlier DSL standards needed 2, or even 3 pairs. In addition, it is useful to remember that this standard is symmetric, ie, the maximum data rate both "upstream" & "downstream" is the same. Compare this to ADSL (which also needs just one line!). Where ADSL utilizes unoccupied frequencies & averts conflict with analog voice frequencies, SDSL takes over the whole line. SDSL eliminates analog voice capabilities in favour of full-duplex data transmission. No splitter, no analog voice-nothing but data. As a decent alternative to T1, SDSL has gotten a fair amount of attention from Competitive Local Exchange Carriers. :O) SDSL & Voice Over Data SDSL is a low latency technology & is ideally suited for Voice over Data applications such as Voice over IP & Voice over ATM. SDSL can also transport a mix of traditional 64Kbps voice channels & data. This enables SDSL to address the business needs of both voice & data connectivity. link to more SDSL Q&A's SDSL can be very useful for sending very large emails, voice over IP, & video conferencing, the subscription price is high. Its not known whether BT Wholesale are using the pre-registration scheme, as they use for ADSL also there are no set trigger levels. ATM Eclipse is the only ADSL isp to my knowlege that has been gathering/collecting SDSL registrations but it has been enough to kick BT into motion to update their exchanges (below) Exchange Name,County,RDA,SDSL Ready for Service Derby,Derbyshire,East Midlands,To be confirmed Montfort,Leicestershire,East Midlands,30/11/2004 Hinckley,Leicestershire,East Midlands,30/11/2004 Loughborough,Leicestershire,East Midlands,To be confirmed Leicester,Leicestershire,East Midlands,To be confirmed Northampton,Northamptonshire,East Midlands,To be confirmed Kettering,Northamptonshire,East Midlands,To be confirmed Duston,Northamptonshire,East Midlands,To be confirmed Mansfield,Nottinghamshire,East Midlands,To be confirmed Bedford,Bedfordshire,East of England,30/07/2004 Luton,Bedfordshire,East of England,To be confirmed Dunstable,Bedfordshire,East of England,To be confirmed Cambridge,Cambridgeshire,East of England,30/11/2004 Peterborough,Cambridgeshire,East of England,To be confirmed Huntingdon,Cambridgeshire,East of England,To be confirmed Brentwood,Essex,East of England,30/11/2004 Southend,Essex,East of England,To be confirmed Colchester,Essex,East of England,To be confirmed Chelmsford,Essex,East of England,To be confirmed St Albans,Hertfordshire,East of England,30/07/2004 Stevenage,Hertfordshire,East of England,To be confirmed Hemel Hempstead,Hertfordshire,East of England,To be confirmed Watford,Hertfordshire,East of England,To be confirmed Norwich North,Norfolk,East of England,To be confirmed Norwich City,Norfolk,East of England,To be confirmed Kings Lynn,Norfolk,East of England,To be confirmed Bury St Edmunds,Suffolk,East of England,30/11/2004 Ipswich,Suffolk,East of England,To be confirmed Earls Court,Greater London,London,30/07/2004 Chelsea,Greater London,London,30/07/2004 Uxbridge,Greater London,London,30/07/2004 Skyport,Greater London,London,30/07/2004 Hendon,Greater London,London,30/07/2004 Golders Green,Greater London,London,30/07/2004 Edgeware,Greater London,London,30/07/2004 Colindale,Greater London,London,30/07/2004 Chiswick,Greater London,London,30/07/2004 Acton,Greater London,London,30/07/2004 Enfield,Greater London,London,30/07/2004 Bowes Park,Greater London,London,30/07/2004 Barking,Greater London,London,30/07/2004 Barnet,Greater London,London,30/07/2004 Walworth,Greater London,London,30/07/2004 Lower Holloway,Greater London,London,30/07/2004 Woolwich,Greater London,London,30/11/2004 Lee Green,Greater London,London,30/11/2004 Greenwich,Greater London,London,30/11/2004 Feltham,Greater London,London,To be confirmed Sidcup,Greater London,London,To be confirmed Farnbourough,Greater London,London,To be confirmed Ponders End,Greater London,London,To be confirmed North Finchley,Greater London,London,To be confirmed Edmonton,Greater London,London,To be confirmed Cricklewood,Greater London,London,To be confirmed Chester South,Cheshire,North West,30/11/2004 Macclesfield,Cheshire,North West,30/11/2004 Warrington,Cheshire,North West,30/11/2004 Chester North,Cheshire,North West,To be confirmed Chester Central,Cheshire,North West,To be confirmed Manchester Moss Side,Greater Manchester,North West,30/07/2004 Manchester Mercury,Greater Manchester,North West,30/07/2004 Wigan,Greater Manchester,North West,To be confirmed Preston,Lancashire,North West,30/11/2004 Lancaster,Lancashire,North West,30/11/2004 Burnley,Lancashire,North West,30/11/2004 Blackburn,Lancashire,North West,30/11/2004 Stockton,Cleveland,One North East,30/11/2004 Middlesborough,Cleveland,One North East,30/11/2004 Durham,Durham,One North East,To be confirmed Sunderland,Tyne & Wear,One North East,30/11/2004 Newcastle,Tyne & Wear,One North East,30/11/2004 Aberdeen Denburn,Grampian,Scotland,30/11/2004 Edinburgh Newington,Lothian,Scotland,30/07/2004 Edinburgh Donaldson,Lothian,Scotland,To be confirmed Hamilton,Strathclyde,Scotland,30/07/2004 Eaglesham,Strathclyde,Scotland,30/07/2004 Clydebank,Strathclyde,Scotland,30/07/2004 Dunning,Tayside,Scotland,30/11/2004 Slough Main,Berkshire,South East,30/07/2004 Reading Central,Berkshire,South East,30/07/2004 Bracknell,Berkshire,South East,30/07/2004 Reading Tilehurst,Berkshire,South East,To be confirmed Reading South,Berkshire,South East,To be confirmed Newbury,Berkshire,South East,To be confirmed Maidenhead,Berkshire,South East,To be confirmed Reading Earley,Berkshire,South East,To be confirmed Milton Keynes,Buckinghamshire,South East,30/11/2004 Aylesbury,Buckinghamshire,South East,30/11/2004 High Wycombe,Buckinghamshire,South East,To be confirmed Bradwell Abbey,Buckinghamshire,South East,To be confirmed Hove,East Sussex,South East,30/11/2004 Eastbourne,East Sussex,South East,To be confirmed Hastings,East Sussex,South East,To be confirmed Portsmouth North End,Hampshire,South East,30/07/2004 Cosham,Hampshire,South East,30/07/2004 Basingstoke,Hampshire,South East,To be confirmed Aldershot,Hampshire,South East,To be confirmed Winchester,Hampshire,South East,To be confirmed Southampton,Hampshire,South East,To be confirmed Andover,Hampshire,South East,To be confirmed Portsmouth,Hampshire,South East,To be confirmed Maidstone,Kent,South East,30/11/2004 Tunbridge Wells,Kent,South East,To be confirmed Gravesend,Kent,South East,To be confirmed Canterbury,Kent,South East, Ashford,Kent,South East,To be confirmed Chatham (Medway),Kent,South East,To be confirmed Oxford,Oxfordshire,South East,To be confirmed Banbury,Oxfordshire,South East,To be confirmed Guildford,Surrey,South East,30/07/2004 Woking,Surrey,South East,To be confirmed Camberley,Surrey,South East,To be confirmed Staines,Surrey,South East,To be confirmed Leatherhead,Surrey,South East,To be confirmed Byfleet,Surrey,South East,To be confirmed Worthing Central,West Sussex,South East,To be confirmed Horsham Carfax,West Sussex,South East,To be confirmed Bristol West,Avon,South West,To be confirmed Bristol Redcliffe,Avon,South West,To be confirmed Bristol North,Avon,South West,To be confirmed Bath Kingsmead,Avon,South West,To be confirmed Sowton,Devon,South West,To be confirmed Plymouth,Devon,South West,To be confirmed Exeter,Devon,South West,To be confirmed Gloucester,Gloucestershire,South West,To be confirmed Cheltenham,Gloucestershire,South West,To be confirmed Swindon,Wiltshire,South West,30/11/2004 Salisbury,Wiltshire,South West,To be confirmed Newport,Gwent,Wales,To be confirmed Bridgend,Mid Glamorgan,Wales,To be confirmed Roath (Cardiff),South Glamorgan,Wales,To be confirmed Cardiff Central,South Glamorgan,Wales,To be confirmed Hereford,Hereford & Worcester,West Midlands,30/11/2004 Worcester,Hereford & Worcester,West Midlands,30/11/2004 Kidderminster,Hereford & Worcester,West Midlands,30/11/2004 Shrewsbury,Shropshire,West Midlands,30/11/2004 Stoke Trinity,Staffordshire,West Midlands,To be confirmed Stafford,Staffordshire,West Midlands,To be confirmed Burton On Trent,Staffordshire,West Midlands,To be confirmed Warwick,Warwickshire,West Midlands,30/07/2004 Solihull,Warwickshire,West Midlands,30/07/2004 Rugby,Warwickshire,West Midlands,30/07/2004 Leamington Spa,Warwickshire,West Midlands,30/07/2004 Stratford Upon Avon,Warwickshire,West Midlands,30/11/2004 Scunthorpe,Humberside,Yorkshire Forward,To be confirmed Scarborough,North Yorkshire,Yorkshire Forward,30/11/2004 Harrogate,North Yorkshire,Yorkshire Forward,To be confirmed Barnsley,North Yorkshire,Yorkshire Forward,To be confirmed Huddersfield,West Yorkshire,Yorkshire Forward,30/11/2004 Halifax,West Yorkshire,Yorkshire Forward,30/11/2004