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  • 8/9/2019 IPClear MPLS VPN Whitepaper

    1/9

    Whitepaper

    A competitive comparison of

    IPClear and MPLS VPN

  • 8/9/2019 IPClear MPLS VPN Whitepaper

    2/9NetServices Plc. Waters Edge Business Park, Modwen Road, Salord, Manchester, M5 3EZ, UK

    Tel: 0870 753 0900 - E-mail: [email protected] Web: www.netservicesplc.comalltogetherBusiness

    A Brie Look at Current Issues

    Traditionally the requirement or QoS enabled access technologies,

    such as leased lines and the BT IP Clear ADSL access variants has

    proved to be too expensive a component to justiy IP Telephony

    deployment to small oces. This constraint is accentuated with a

    requirement to service between 1 and 16 handsets. In many cases

    the capital expenditure required ensures that the return on investment(ROI) model or the solution simply does not work.

    This issue is compounded when considering the easibility o an

    IP Telephony solution or organisations where there are a large

    proportion o small sized oces. This generally results in one o

    three scenarios occurring;

    1. The ROI model associated with the IP Telephony solution ails,

    resulting in the solution not being deployed and the organisation

    maintaining its existing telephony inrastructure. This oten happens

    when the integrator, or reseller, involved has already spent time

    designing and speciying the solution.

    2. IP Telephony is only deployed to the larger oces. This cut-down

    solution does not enable the organisation to benet rom all o the

    eciencies created by an organisation-wide IP Telephony roll-out and

    limits hardware and managed service value or the reseller.

    3. The systems integrator makes a loss in deploying the service to

    the small oces in order to justiy the ROI associated with the IP

    Telephony solution.

    None o the above are ideal outcomes or the integrator involved.

    Introducing NetServices QoS over DSL products as part o the

    network dramatically improves the prospect o winning a protable

    IP telephony solution. QoS over DSL provides the Systems Integrator

    community with the potential to revisit both current and pending

    opportunities, as well as potentially enhancing the existing IPTelephony solutions that they are already supporting.

    Examining the Options

    BT IP Clear is still the product o choice or most voice networking

    requirements. The reduced ootprints o Local Loop Unbundled

    networks have ensured that IP Clear has remained the market

    leader. NetServices QoS over DSL solutions utilise the BT IPStream

    and DataStream DSL network inrastructures to provide a credible

    alternative, incorporating the same coverage and improved capability

    over IP Clear.

    DSL is ast becoming accepted as the access technology or next

    generation networks. The increased capacity provided by ADSL Max,

    and in the near uture by ADSL version 2 technologies, will ensure

    that DSL will supersede legacy technologies, such as leased lines

    and ISDN, in delivering voice connectivity to locations at a reduced

    cost. Service levels around DSL are predicted to be improved

    through the introduction o a business grade enhanced care product.

    Now NetServices unique ability in prioritising trac over DSL can

    extend its use in solutions where previously it was unsuitable.

    1

    BTs IP Clear product is seen as the deault choice or many IP Telephony (IPT) roll-outs as it is generally seen as a robustand proven technology. Limitations with this solution arise when small or branch ofces need to be considered as part o the

    solution. Moving rom an ADSL IP Clear solution capable o delivering two calls rather than one gives rise to a price increase o 230%.

    Allthough DSL is the cost-eective option or networking until recently it too had limitations. The act that it was impossible to deliver

    prioritisation or Quality o Service (QoS) over all DSL technologies, vital or many voice implementations, resulted in DSL being unsuitable or

    voice over IP networks.

    NetServices have developed the ability to run QoS over all DSL solutions providing ar greater technical fexibility in IPT roll-outs as well as

    signicant commercial benets. Connecting the small oce with QoS over DSL produces network savings in excess o 59% and 83% against

    IP Clear, when providing 2-4 calls and 5-16 simultaneous voice calls respectively.

    NetServices oers the ability to deliver cost-eective voice networks in all scenarios, even to the smallest o sites, and eectively overcomes

    the limitations o IP Clear to deliver a small number o simultaneous calls cost-eectively.

    Part 1: The Commercials o Convergence (04/04/08)

  • 8/9/2019 IPClear MPLS VPN Whitepaper

    3/9NetServices Plc. Waters Edge Business Park, Modwen Road, Salord, Manchester, M5 3EZ, UK

    Tel: 0870 753 0900 - E-mail: [email protected] Web: www.netservicesplc.comalltogetherBusiness

    Delivering Voice Solutions in that Problem Range

    1-16 Simultaneous Calls

    The available technologies used to deliver a small number o

    simultaneous voice calls to a location have traditionally been

    restricted to leased lines and the BT IP Clear ADSL access variants.

    Their limitations when voice capacities versus cost are comparedhave already been highlighted. The ollowing direct comparisons

    scrutinise the commercials in more detail.

    Technical Comparison

    Using IP Clear

    Using an IP Clear solution organisations can connect their small

    oces to a QoS enabled network by a number o methods o access

    technology. The three IP Clear access technologies most commonly

    used to service small oces, in terms o a best commercial and

    technical t, are as ollows:

    1. ADSL Plus - contended (5:1) ADSL Service.

    2. ADSL Premium - non-contended (1:1) ADSL Service.

    3. Leased Line

    Quality o Service can be applied to all three IP Clear access

    technologies, with six classes o service being available. Voice must

    be congured into the prioritised, expedited orwarding (EF) class.

    BT stipulates a maximum congurable amount o bandwidth that

    can be used or voice trac. This gure is dependent upon the type

    o access technology, and is detailed below or the ADSL IP Clear

    access products:

    ADSL Plus - 30kbps voice bandwidth

    ADSL Premium - 130kbps voice bandwidth

    To optimally use the available voice bandwidth it is essential to use

    the G.729 CODEC at a 30msec sampling rate. This ensures that the

    bandwidth consumed by one voice call is 28.3kbps. Thereore to

    deliver between 1 and 16 simultaneous voice calls, the ollowing IP

    Clear access technologies can be used:

    Table 2. Minimum IP Clear product to service

    1 16 simultaneous G.729 voice calls

    ADSL Plus is capable o delivering one voice call, whereas the ADSL

    Premium is capable o delivering up to a maximum o 4 simultaneous

    voice calls. For delivery o greater than 4 simultaneous voice calls a

    leased line is required.

    Using NetServices QoS over DSL

    NetServices has an extensive range o access technologies suitable

    to connect smaller oces to a QoS enabled network. The most

    common MPLS VPN access technologies used to service small

    oces, in terms o a best commercial and technical t, are as

    ollows:

    1. QoS DSL IPStream - contended (oce) ADSL Service

    2. QoS ADSL DataStream - non-contended (1:1) ADSL Service

    3. QoS SDSL DataStream - non-contended (1:1) SDSL Service

    2

    Table 1. Solution Overviews

    BT IP Clear

    The BT IP Clear solution provides a wires-only IP access service that

    enables large corporations, mid-size enterprise, carriers and ISPs to create

    IP based VPN services.

    It is based upon BTs wholly owned and managed Multi Protocol Label

    Switching (MPLS) network and is marketed as providing the perormance,

    reliability and security o a leased line network, with the any-to-any

    scalabilities and fexibilities o an IP network.

    BT IP Clear enables network connectivity to locations over a wide range o

    bandwidths and oers dierentiated perormance levels and prioritisation

    o delay, and non-delay sensitive trac, including voice and multi-media

    applications.

    There is a dened pricing structure with a one-o connection charge

    and an annual rental ee required per access into IP Clear connection.

    A competitive Universal Discount Scheme based on annual spend and

    commitment is available to wholesale partners, with a maximum 30%

    saving being available or a 5 year committed annual spend o above 2 million.

    NetServices Wires-Only MPLS VPN

    NetServices are networking specialists with a comprehensive portolio

    o converged communications solutions acilitating the delivery o voice

    and other mission critical data applications. Our expertise, and unique

    ability in QoS over DSL access technologies or MPLS VPN solutions,

    is complemented by use o ethernet and leased line capabilities where

    appropriate.

    NetServices MPLS VPN service is available as a ully managed network

    service, or unbundled as a wires-only service. The wires-only option is

    ideal or systems integrators and value added reseller partners, enabling

    them to provision client networks through NetServices, whilst supplying

    and managing the routers and other customer premises equipment (CPE)

    themselves.

    There is a simple pricing structure or service where a one-o connection

    charge and an annual rental ee are required per connection.

    A partner discount scheme is also available.

    MaximumSimultaneous

    Calls

    Access into IP Clear product required

    1 256kbps ADSL Plus Access into IP Clear with 30kbps EF

    2 256kbps ADSL Premium Access into IP Clear with 60kbps EF

    4 256kbps ADSL Premium Access into IP Clear with 120kbps EF

    5 256kbps Leased Line Access into IP Clear with 150kbps EF

    8 512kbps Leased Line Access into IP Clear with 240kbps EF

    16 1024kbps Leased Line Access into IP Clear with 480kbps EF

  • 8/9/2019 IPClear MPLS VPN Whitepaper

    4/9NetServices Plc. Waters Edge Business Park, Modwen Road, Salord, Manchester, M5 3EZ, UK

    Tel: 0870 753 0900 - E-mail: [email protected] Web: www.netservicesplc.comalltogetherBusiness

    Quality o Service can be applied to all technologies, with up to a

    maximum o our classes o service being available. Voice must be

    congured into the prioritised Platinum class.

    The maximum amounts o bandwidth that can be reserved or voice

    trac or the ollowing NetServices QoS over ADSL access products

    are as ollows:

    812kbps QoS DSL IPStream - 150kbps voice bandwidth

    256kbps QoS ADSL DataStream - 192kbps voice bandwidth

    512kbps QoS ADSL DataStream - 384kbps voice bandwidth

    The above gures are based around the standard NetServices

    product set. A number o enhanced service options are available

    on a bespoke basis or both QoS DSL IPStream and DataStream,

    where the boundaries o ADSL Max technology have been stretcheddelivering greater voice bandwidth.

    By optimally using the G.729 CODEC with the variables o sampling

    rate and real-time header compression, the voice bandwidth

    consumed by 1 voice call will be 28.3kbps and 21.2kbps across

    QoS DSL IPStream and QoS DSL DataStream respectively.

    Thereore to deliver between 1 and 16 simultaneous voice calls, the

    ollowing QoS over DSL access products can be used:

    Table 3. Minimum NetServices QoS over DSL product to service 1 16

    simultaneous G.729 voice calls

    QoS DSL IPStream is capable o delivering upwards o 5, and QoS

    DSL DataStream is capable o delivering up to 16, simultaneous

    voice calls to an oce.

    Commercial Comparison

    Viewing the commercials against the technical solutions outlined

    above immediately highlights the issues integrators have with certain

    installs - as well as demonstrating a sweet-spot or the NetServices

    solution. The below table provides a direct cost comparison between

    the NetServices and IP Clear products required to deliver the stated

    maximum number o simultaneous calls to a small oce. The

    NetServices enhanced care option has been actored in to ensure

    that service levels are comparable.

    All pricing is based around BT and NetServices guide pricing and is

    exclusive o any discounts scheme. It is worth considering that the

    maximum saving that could be achieved via the BT VPN universal

    discount scheme is 30%, though the ADSL Plus service does not

    qualiy under this scheme. Bespoke pricing is available rom both

    parties, BT and NetServices, based on the metrics o contract term

    and customer network design.

    The substantial price increase when moving between the ADSL Plus

    and the ADSL Premium solution is key to understanding the benets

    the NetServices solution oers. ADSL Premium becomes essential

    when the solution has the need to handle 2 calls rather than 1. In

    commercial terms this requirement equates to an increase o 230%.

    Using NetServices or the deployment o 2-4 simultaneous calls, QoS

    DSL IPStream provides savings in the region o 59% over its most

    comparable BT IP Clear solution, ADSL Premium.

    The only IP Clear solution able to provide sucient voice bandwidth

    or more than 4 calls is a leased line. With NetServices using QoS

    DSL IPStream or upwards o 5, and QoS DSL DataStream or up to

    16 simultaneous calls, annual network savings in excess o 83% are

    achieved.

    3

    Maximum

    SimultaneousCalls

    NetServices Access Product Required

    1 800kbps QoS ADSL IPStream, 50kbps Platinum

    2 800kbps QoS ADSL IPStream, 100kbps Platinum

    4 800kbps QoS ADSL IPStream, 150kbps Platinum

    5 800kbps QoS ADSL IPStream, 150kbps Platinum

    8 256kbps QoS ADSL DataStream, 180kbps Platinum

    16 512kbps QoS ADSL DataStream, 360kbps Plat inum

    Maximum

    Simultaneous Calls

    NetServices

    set-up charge

    IP Clear

    set-up charge

    NetServices

    set-up saving

    NetServices

    annual rental charge

    IP Clear

    annual rental charge

    NetServices

    annual rental saving

    1 100.00 100.00 0.00% 640.00 650.00 1.54%

    2 100.00 500.00 80.00% 875.00 2,150.00 59.30%

    4 100.00 500.00 80.00% 955.00 2,300.00 58.48%

    5 100.00 1,500.00 93.33% 955.00 5,875.00 83.74%

    8 135.00 2,500.00 94.60% 1,525.00 9,100.00 83.24%

    16 135.00 3,500.00 96.14% 1,915.00 12,187.50 84.29%

    Table 4. Commercial Comparison between using NetServices and IP Clear or 1 16 Simultaneous G.729 Voice Calls

  • 8/9/2019 IPClear MPLS VPN Whitepaper

    5/9NetServices Plc. Waters Edge Business Park, Modwen Road, Salord, Manchester, M5 3EZ, UK

    Tel: 0870 753 0900 - E-mail: [email protected] Web: www.netservicesplc.comalltogetherBusiness

    Example Scenarios

    The previous section has demonstrated the commercial benets o

    the NetServices QoS over DSL products or providing between 1 and

    16 simultaneous voice calls to a small oce. Mapping these intoreal-world scenarios, highlighted earlier, urther demonstrates the

    commercial benets. In the opening section o this paper a strong

    conclusion was made that the cost o legacy network technologies,

    such as the BT IP Clear solution, ensures that the ROI models or

    IP Telephony solutions does not work, especially or multi-oce

    scenarios where there are large numbers o small oces.

    Scenario 1: Company A

    Company A is a UK based organisation specialising in the sale and

    distribution o a garden product. There are 85 medium sized retail

    outlets and an additional 20 small outlets located within well known

    department stores. In addition there is a group headquarters, their

    northern and southern distribution centre, and a main manuacturing plant.

    It is the view o both the systems integrator and the companys IT

    Director that the communications inrastructure currently in

    place is over specied or their requirements. The outcome to

    be urther explored is; would the introduction o a group wide

    converged communications inrastructure provide signicant

    communications cost savings and generate signicant operational

    eciencies?

    The Systems Integrator previously proposed a converged multi-site

    IP Telephony solution using the BT IP Clear solution in conjunction

    with Cisco Call Manager. Signicant savings were expected through

    the removal o some PSTN lines at the retail outlets, as well as

    reduced call rates with all external calls being centrally routed via the

    Headquarters, and ree on-net calls between oces.

    However the ROI model did not work due to the capital and

    operational expenditure attributed to the IP Clear network

    component, so the opportunity has not moved orward.

    To assess this opportunity the existing voice and data requirements

    or all o Company As oce types have been determined and the

    most suitable IP Clear and NetServices network solutions specied

    by means o comparison.

    Converged Network Requirements

    Company A has disparate voice systems. Communications at all

    sites are completely autonomous thereore all company wide internal

    calls and external calls are routed out via the PSTN. There are PBX

    systems located at the 4 large oces where they are connected to

    the PSTN via ISDN30e connections. The retail outlets have a number

    o analogue phones that are individually connected to the PSTN.

    An MPLS data network is used to connect all sites together.

    The Groups IT applications are centralised at the headquarters.

    The network delivers applications including EPOS, email, stock

    control and limited web browsing via a central proxy server at

    the headquarters. There are no plans to introduce any urther

    applications in the next three years.

    The diagram below represents the current voice and data communications

    set-up o Company A with its separate voice and data networks.

    The individual voice and data requirements or all oces have been

    assessed by Company A and their Systems Integrator partner to

    determine the requirements or a ully converged voice and data

    network solution, and are outlined in the table below.

    Table 5. Company As converged network bandwidth requirements

    4

    MPLS WAN

    PBX

    PBX

    PBX PSTNPSTN

    ISDN30e

    15 Channels

    ISDN30e

    8 Channels

    Analogue

    Lines

    Analogue Phones

    Distribution

    Centres

    1Mb/s SDSL

    2Mb/s

    Leased Line

    2x ISDN30e

    60 Channels

    Headquarters

    1Mb/s SDSL

    512kbps

    ADSL Office

    512kbps

    ADSL Office

    Manufacturing

    Plant

    Larger Retail

    Outlets

    Small Retail

    Outlets

    Analogue Phones

    Figure 1. Company A Existing Voice and Data Network

    Ofce Type

    Maximum

    simultaneous

    calls

    Voice

    bandwidthrequirement

    (kbps)

    Data

    bandwidthrequirement

    (kbps)

    Total

    bandwidthrequirement

    (kbps)

    Group Headquarters 35 990.5 545.5 1536

    Distribution Centre 12 339.6 250 589.6

    Manuacturing Plant 4 113.2 75 188.2

    Large Outlet 2 56.6 5 61.6

    Small Outlet 1 28.3 5 33.3

  • 8/9/2019 IPClear MPLS VPN Whitepaper

    6/9NetServices Plc. Waters Edge Business Park, Modwen Road, Salord, Manchester, M5 3EZ, UK

    Tel: 0870 753 0900 - E-mail: [email protected] Web: www.netservicesplc.comalltogetherBusiness

    IP Clear Solution or Company A

    The most appropriate IP Clear solution or Company As converged

    networking requirements can be seen in the table below.

    For the purposes o pricing this network it has been assumed that

    non voice trac is treated as best eorts and that no UniversalDiscount Scheme pricing has been applied.

    Leased lines are required to satisy the voice requirement o the

    headquarters and distribution centres due to the congurable

    voice bandwidth being well in excess o the 130kbps limit o ADSL

    Premium access into IP Clear. For the manuacturing plant and large

    outlets, the IP ADSL Premium product can be used as it can easily

    cope with the voice and data bandwidth requirements. The small

    outlets only have the requirement or 1 voice call and so the ADSL

    Plus product is suitable.

    NetServices MPLS solution or Company A

    The NetServices solution or Company A utilises three accesstechnology types as outlined below. The table also outlines the cost

    savings achieved in comparison to the IP Clear solution.

    For the purposes o pricing this network it was assumed that non

    voice trac is treated as best eorts, the enhanced care option has

    been selected, and no discount scheme pricing is applied.

    A leased line has been recommended or the headquarters in

    preerence to SDSL, due to the importance o the oce and

    the enhanced Service Level Guarantee that is available with this

    technology. For the distribution centres the QoS DSL DataStream

    product proved best-t to deliver the required number o voice calls.

    The manuacturing plant and the retail outlets will use variants o the

    QoS DSL IPStream product depending upon the voice requirements.

    In this example QoS over DSL can be used to service the converged

    network requirements or all but one o Company A sites. Using the

    NetServices solution means the integrator can deploy a solution thatboth delivers the expected service levels and provides network savings

    in excess o 73% at set-up and 57% on an ongoing annual basis.

    Conclusions

    NetServices QoS over DSL technologies enables organisations to

    cost eectively deploy IP Telephony solutions to a greater proportion

    o locations - in particular small oces.

    Because the ROI model is improved or organisation wide deployment

    (as it reduces the WAN component charges) the business case or IP

    Telephony is much more compelling or end-user organisations.

    A more compelling business case to adopt IP Telephony ensures

    additional benets seen can also be realised. These include greater

    fexibility, enhanced user eature intuitiveness, improved reach and

    presence, the introduction o unied communications and more

    e-business applications.

    QoS DSL is an enabler or organisations to achieve the above

    objectives which will ultimately lead to the Systems Integrator

    increasing value-added managed services to organisations.

    5

    Ofce TypeNo. oOfces

    IP Clear SolutionSet-UpCharge

    Annual RentalCharge

    Total Set-UpCharge

    Total AnnualRental Charge

    Group Headquarters 1 2Mbps Leased Line with 995kbps EF 3,500.00 14,487.50 3,500.00 14,487.50

    Distribution Centre 2 1Mbps Leased Line with 340kbps EF 3,500.00 11,850.00 7,000.00 23,700.00

    Manuacturing Plant 1 512kbps ADSL Premium with 115kbps EF 500.00 3,387.50 500.00 3,387.50

    Large Outlet 85 256kbps ADSL Premium with 60kbps EF 500.00 2,150.00 42,500.00 182,750.00

    Small Outlet 20 256kbps ADSL Plus with 30kbps EF 100.00 650.00 2,000.00 13,000.00

    Total 55,500.00 237,325.00

    Table 6. Minimum IP Clear solution or Company As converged networking requirements

    Table 7. Minimum NetServices solution or Company As converged networking requirements and savings over IP Clear

    Ofce TypeNo. o

    OfcesNetServices Access Solution

    Set-Up

    Charge

    Annual

    Rental Charge

    Total

    Set-Up Charge

    Total Annual

    Rental Charge

    Group Headquarters 1 2Mbps Leased Line with 995kbps Platinum 3,971.29 6,906.71 3,971.29 6,906.71

    Distribution Centre 2 1Mbps QoS ADSL DataStream, 360kbps Platinum 135.03 2,800.22 270.00 5,600.44

    Manuacturing Plant 1 800kbps QoS ADSL IPStream, 150kbps Platinum 100.00 955.00 100.00 955.00

    Large Outlet 85 800kbps QoS ADSL IPStream, 100kbps Platinum 100.00 875.00 8,500.00 74,375.00

    Small Outlet 20 800kbps QoS ADSL IPStream, 50kbps Platinum 100.00 640.00 2,000.00 12,800.00

    Total 14,841.29 100,637.15

    Saving over IP Clear 40,658.71 136,687.85Saving as a Percentage 73.26% 57.60%

  • 8/9/2019 IPClear MPLS VPN Whitepaper

    7/9NetServices Plc. Waters Edge Business Park, Modwen Road, Salord, Manchester, M5 3EZ, UK

    Tel: 0870 753 0900 - E-mail: [email protected] Web: www.netservicesplc.comalltogetherBusiness

    From humble beginnings as a cheap orm o internet accessor the home user, DSL technologies have matured to

    become a valuable business communications tool. Until now

    its limitations have been that most DSL in the UK has been

    delivered across the BT IPStream network, this is a contended

    network unable to dierentiate between trafc types and

    prioritise accordingly. In eect, this has limited the value

    o incorporating DSL in converged solutions where it was

    otherwise most suited i.e. at the smallest sites.

    NetServices have now breached this boundary, thus elevating DSL

    rom bit part player to its leading role in enabling convergence or

    the SME, branch oce and teleworker. NetServices only use privateDSL networks as the basis o all our services so no public internet

    is involved, thus minimising the security risks many are concerned

    about with DSL based services.

    This has been achieved by incorporating a number o products and

    technical eatures to achieve MPLS across the NetServices core

    network.

    QoS over DSL Access Technologies

    NetServices delivers QoS over DSL access technologies via both its

    DataStream and IPStream networks.

    Technical Benefts

    By developing an innovative range o DSL solutions to provide QoS

    enabled connectivity to oces, distinct technical advantages over

    the BT IP Clear solution are realised with the NetServices QoS over

    DSL products. The scope o the technical advantages includes the

    ollowing;

    The use o ADSL Max technology or all ADSL access circuits

    allows delivery o increased upstream, thereore synchronous

    bandwidth over ADSL, enabling a greater volume o simultaneous

    calls to be provided to oces. For IP Clear ADSL access circuits,upstream bandwidth is limited to 256kbps.

    The bandwidth that can be reserved or voice trac when

    applying QoS on NetServices ADSL access circuits is greater than

    that available with the respective IP Clear products. This enables

    more voice calls to be made and ensures that the voice quality can

    be optimised. NetServices recommend the maximum congurable

    bandwidth being provisioned into the Platinum class should not

    exceed 75% o the network access bandwidth or voice-only

    deployment scenarios, and 50% or converged scenarios.

    The use o IP Clear in conjunction with the G.711 CODEC isbandwidth inecient as only 1 call can be made with the ADSL

    Premium service and no calls can be made with the ADSL

    Plus service. This will impact upon the capability to use legacy

    telephony devices such as axes, as they only use the G.711CODEC ater conversion via an ATA device. Thereore, when using

    IP Clear it is likely that PSTN lines will need to be maintained i

    legacy ax devices are to remain.

    The NetServices QoS DSL DataStream product supports the

    use o the Real Time Header Compression (cRTP) eature which is

    not available with IP Clear. This approximately doubles the amount

    o concurrent calls that can be achieved in comparison to ADSL

    Premium Access into IP Clear.

    Multi Link Point to Point Protocol (MLPPP) bonding is available

    with the QoS DSL DataStream product, providing increasedsynchronous bandwidth to oces. This is ideal or oces where

    the achievable DSL line rate is low, or the cost and/or availability

    o other higher bandwidth access technologies, such as leased

    lines/ethernet, is restricted. This is usually dictated by geography.

    Service Advantages

    In addition to the technical advantages o the NetServices QoS over

    ADSL products, there are some signicant service dierences that

    should also be considered when comparing products, these are

    detailed below.

    NetServices provide a ull Service Level Guarantee or the QoS

    over DSL services. There is no SLG or service availability or

    restoration with the IP Clear ADSL access connections.

    Enhanced Care is provided with the IP Clear ADSL access

    product, this provides a 24 hour 365 day cover, with a 4 hour

    response and 24 hour repair target. Enhanced Care is available

    rom NetServices as an option, and so can be omitted, reducing

    annual rental pricing.

    The standard lead time or delivery o services or the

    NetServices QoS over DSL products is 15 working days. TheIP Clear ADSL access products have a standard lead time o

    25 working days. Unlike the NetServices products, there are no

    penalties i the contractual delivery date is not achieved with the IP

    Clear ADSL access products.

    For both IP Clear ADSL access products and the NetServices

    QoS DSL DataStream access product there is a minimum

    contractual term o 12 months. There is a level o fexibility with

    the QoS DSL IPStream access products and thus shorter contract

    terms can be provided, on an opportunity specic basis only.

    6

    Part II: How it Works, The Technical Details

  • 8/9/2019 IPClear MPLS VPN Whitepaper

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    Tel: 0870 753 0900 - E-mail: [email protected] Web: www.netservicesplc.comalltogetherBusiness

    QoS DSL - DataStream

    ADSL and SDSL services are delivered via the BT DataStream ATM

    based network. Here the connectivity provisioned to a location uses a

    dedicated Virtual Path within the DataStream ATM network, rom thelocation to NetServices, ensuring that the service is non-contended.

    Non-contended circuits oer greater throughput rates, with a higher

    level o consistency than contended DSL services. The achievable

    bandwidth is comparable to leased lines, though cost is reduced at

    the expense o the SLA.

    The use o ADSL Max technology provides an increased upstream

    capability, thereore greater voice bandwidth can be provisioned than

    with standard ADSL, where the upstream is restricted to 256kbps. The

    1Mbps service provides a hybrid solution with the achievable line speeds

    in between those available with SDSL and conventional ADSL services.

    Bonded DSL circuits are available where a number o end-user

    access circuits are mapped into a dedicated Virtual Path within the

    BT DataStream network. Multi-Link Point-to-Point Protocol (MLPPP)

    is then used to aggregate the sum o the bandwidth supplied by the

    individual access circuits.

    QoS DSL - IPStreamQoS DSL - IPStream technology provides downstream QoS over

    contended ADSL Max Oce circuits. The Cisco eature per session

    shaping and queuing over L2TP is used to prioritise bandwidth

    delivered into the BT network. BT state that the expected end user

    experience or ADSL Max will provide a downstream throughput o

    800kbps, thereore a best eorts QoS capability is achieved.

    The technology provides signicant technical advantages over

    standard contended DSL circuits, where some QoS eatures can

    be implemented in the upstream direction o the outbound CPE

    interace, but not in the downstream direction.

    Using contended DSL with limited QoS eatures results in the user

    experience being inconsistent, especially when running a real-time

    data application across the service. For example when making a

    voice call, speech quality may be acceptable or a long period until a

    large data le starts downloading simultaneously with the trac rom

    a voice call. With no downstream QoS available, voice and data trac

    are competing or bandwidth. This can result in jitter, delay and packet

    loss ultimately causing speech quality to be detrimentally aected.

    QoS DSL - IPStream is available with a xed bandwidth and a nite

    number o service policy options, in both converged and data-only

    ormats. The table below provides a direct comparison between the

    NetServices and BT ADSL access products.

    7

    BT ADSL PremiumAccess to IP Clear

    BT ADSL PlusAccess to IP Clear

    NetService QoS ADSL -DataStream

    NetService QoS ADSL- IPStream

    Downstream Bandwidth 2048, 1024, 512, 256kbps 2048, 1024, 512, 256kbpsIncrements up to 8Mb/s, 2048,

    1024, 512, 256kbps812kbps

    Upstream Bandwidth 256kbps 256kbps up to 812kbps, 512kbps, 256kbps up to 812kbps

    Contention 1:1 5:1 1:1Oce Contention, with

    voice bandwidth guaranteed

    QoS Architecture DiServe - DSCP DiServe - DSCP IP Precendence IP Precendence

    Classes o Service 6 (EF, AF1-4, DE) 6 (EF, AF1-4, DE) 4 (Platinum, Gold, Silver & Bronze) 3 (Platinum, Gold & Bronze)

    Congurable Voice Trac1 130kbps EF 30kbps EF256kbps - 190kbps Platinum

    512kbps - 375kbps Platinum50,100, & 150kbps1

    RTP header Compression (cRTP) available no no yes no

    Link Fragmentation and Interleaving available2 yes yes yes no2

    MLPPP bonding available no no yes no

    Maximum concurrent G729 Voice Calls at a

    30msec sampling rate on a single circuit34 1 163 53

    Service Level Guarantees Core Perormance No SLG

    On-Time Delivery,

    Service Availability and

    Restoration with enhanced Care

    option is taken,

    Core Perormance

    On-Time Delivery,

    Service Availability and

    Restoration with enhanced

    Care option is taken,

    Core Perormance

    Enhanced Care - 4 hour response,

    24 hour repair target on ADSLMandatory Mandatory Optional Optional

    Table 8. Technical and Commercial Comparison

    1These are the standard product oerings, other bespoke options are available.

    2The absence o LFI is minimal in most circumstances as the upstream bandwidth available is up to 812kb/s. Thereore the maximum serialisation delay that can be created by thelargest possible IP packet is 15msec.

    3NetServices recommendation.

  • 8/9/2019 IPClear MPLS VPN Whitepaper

    9/9NetServices Plc. Waters Edge Business Park, Modwen Road, Salord, Manchester, M5 3EZ, UK

    Tel: 0870 753 0900 - E-mail: [email protected] Web: www.netservicesplc.comalltogetherBusiness

    Summary

    The BT provided IP Clear network, although a robust and proven network component or an IP Telephony solution, is cost prohibitive or small

    oces. NetServices QoS over DSL product oerings provide systems Integrators and VARs with the ability to deliver more simultaneous voice

    calls over an ADSL connection. This ensures that signicant savings are achieved in delivering IP Telephony to a small oce.

    The IP Clear ADSL Plus and Premium services limit the number o simultaneous calls that can be made, to 1 and 4 respectively, and require

    expensive leased lines to service any higher number o calls. NetServices use ADSL MAX technology to increase upstream bandwidth. Along

    with cRTP and MLPPP eatures, the number o simultaneous voice calls that an ADSL circuit can deliver is increased. The QoS DSL IPStream

    product can deliver up to 5 simultaneous voice calls, and the QoS DSL DataStream product up to 16 simultaneous voice calls.

    Using the NetServices DSL based solution ensures that annual recurring savings in excess o 59% are achieved or delivering 2-4 calls, and

    savings in excess o 83% can be achieved where 4-16 simultaneous voice calls are required.

    By considering a real world scenario it has been possible to show the ull commercial benet o using NetServices QoS over DSL rather than

    an IP Clear solution as the network component o an IP Telephony opportunity. In Company As scenario an organisation with a high proportion

    o small oces, set-up savings o 73% and recurring rental savings o 57% were demonstrated using the NetServices solution rather than the

    IP Clear solution.

    The use o the NetServices QoS over DSL access products provide a superior technical, service and commercial solution or the network

    component required or the delivery o IP Telephony to the small sized oces. When using NetServices network solutions the return on investment

    models or IP Telephony solutions are greatly improved, making it ar more likely and increasing the likelihood o the service being deployed.

    NetServices brings you the alltogetherbusiness

    NetServices provides integrated networking, voice and hosting solutions that enable businesses to become alltogethermore ecient and

    alltogethermore protable.

    Whilst other network integrators talk about the promise o a converged business, we concentrate on the actual delivery o tangible business

    improvement through reliable and proven solutions allied with technological innovation.

    Our business proposition is based upon bringing simplicity and increased business perormance to our customers and reseller partners.

    This is achieved through best in class skillsets, a comprehensive product portolio and an enviable heritage in networking and convergence

    technologies.

    In eect, we bring it alltogether.

    Our customers and reseller partners beneft rom:

    Specialist knowledge in complex network specication

    Expertise in voice and converged solutions

    Carrier and vendor independence

    Our own network and data centre inrastructure

    A fexible approach or adaptable and scalable solutions

    Overseas reach through Teleonica

    PRINCE2 certied Project Managers

    Dedicated ITIL best practice trained Service Managers

    Continuous service improvement plan

    Ongoing customer support and assistance

    24x7 service desk contactable by telephone, email or online portal

    Strict SLAs with regular customer and service reviews

    8