BT Wholesale. Broadband Performance Tester. Customer Handbook Version 6 March 2010

Transcription

1 BT Wholesale Broadband Performance Tester Customer Handbook Version 6 Copyright BT Plc 2010

2 1 INTRODUCTION 3 2 PERFORMANCE TESTER MEASUREMENTS Throughput Measurement Test Routing 4 3 OVERVIEW 5 4 USING THE BT WHOLESALE PERFORMANCE TESTER Accessing the Performance Tester End User Domain Validation Performance Test in progress Performance Tester Results BT IPstream Fixed Rate Services BT IPstream Max Best Effort and Assured Rate services WBC Best Efforts services: WBC Annex M Additional Tests TAP TAP TEST RESULT INTERPRETATION 20 6 BEST PRACTICE 20 7 OBTAINING HELP 21 8 PERFORMANCE TESTER ERRORS Validation/System Errors Messages Java not installed or enabled 23 9 FAQ GLOSSARY DOCUMENT HISTORY 27 Copyright BT Plc 2010 Page 2 of 27

3 1 INTRODUCTION The BT Wholesale Performance Tester has been specifically developed as a performance measurement tool for use by consumers of BT Wholesale IPstream and Wholesale Broadband Connect (WBC) End User Access products. A performance test provides the throughput measurement of a BT Wholesale delivered end user s connection through the BT Wholesale and Communication Provider s (CP) networks. The tool is straightforward to use and can be accessed directly from the internet, however it will only be accessible by BT IPstream and WBC End User Access customers. End Users using Virtual Private Networking (VPN) will not be able to use BT Wholesale Performance Tester for throughput testing due to the Address Proxy function, which is almost always present in a corporate intranet environment. There are many factors that can influence poor performance in a corporate intranet environment therefore initiating a Performance Test may not reflect the true performance of the end users broadband service. It is the Service Provider s responsibility to ensure that a performance related fault has been assessed as genuine by using their own or BT Wholesale supplied tools. Your End User can assist in this diagnosis by conducting a test using the BT Wholesale Performance Tester. Because there are many factors that could influence performance of a broadband service, the BT Wholesale Performance Tester can be used to establish whether its performance is consistent. To do this your End User may need to carry out a number of tests - preferably at different times of the day as there will be times when performance is affected by Peak Periods - this is normal for broadband services. The results of each test will be recorded so that they can be used to assist with any resulting fault investigation. Tests must be carried out from a PC directly connected to the DSL line concerned. It is recommended that the End User does not generate any other IP traffic at the time of the test as it will invalidate the Performance Tester results. 2 PERFORMANCE TESTER MEASUREMENTS 2.1 Throughput Measurement There is an important relationship to understand between the line rate synchronisation, the overheads of the IP protocol that carries the end user data and the throughput that an end user receives. The DSL synchronization or Line Rate (which is set between the end user CPE and the local exchange DSLAM) will always be greater than the actual IP throughput the DSL service will achieve. IP throughput is affected by numerous factors; the protocol overheads that carry the end users traffic data, time of day and Communication Providers product management. This overhead varies depending on the line rate synchronisation speeds but is typically in a range between 1000kbps and 200kbps less than the line rate. For Example: A line with an 8Mbps line rate has a 7Mbps IP throughput whereas a line with a 500Kbps line rate has an IP throughput of 300kbps. Therefore, you should note that the line rate is a known Copyright BT Plc 2010 Page 3 of 27

4 factor and the performance tester result that measures throughput will vary depending on those factors that influence throughput. The BRAS profiles on BT Wholesale network are set to align with calculated IP throughputs for different line rates. The BRAS limits the amount of IP data sent down a line to ensure that BT do not try and transmit more IP data than the line rate can support, as doing so will mean data being discarded in an uncontrolled manner. This uncontrolled discard can cause applications to resend the data, effectively reducing the amount of data (and thus throughput) than can be achieved. The BRAS profile is always greater than the IP throughput on any line. Factors that can potentially influence throughput are; the End User Customer Premises Equipment (CPE) internal telephone wiring local environmental issues such as electrical interfaces (generally referred to as Repetitive Electrical Impulse Noise - R.E.I.N) b wireless networks which can only at best support 5.9 Mbps IP throughput (less in noisier environments) and utilisation on the network including the communication provider s network, the Internet and the service being accessed. 2.2 Test Routing The routing of the performance test varies depending on which service has been en purchased by the CP and which test is being performed; TAP1, TAP2 or TAP3. The following diagrams show the routing for the different tests. Diagram 1 IPstream using Centrals End User Access Testing Copyright BT Plc 2010 Page 4 of 27

5 Diagram 2 IPstream Connect and WBC End User Access Testing 3 OVERVIEW Using the BT Wholesale Performance Tester to test a broadband service is a fairly simple process and should take no longer than 2-3 minutes. End Users will access the performance tester by typing the URL on an internet browser. Please note the following important points: 1. The end user must not point their Internet Browser away from the test screen or start any other download activity on their computer whilst the tests are in progress, as this will invalidate their test results. 2. If during any stage of the test process your end user is presented with a screen that does not correspond with the test process (described in the following subsections), please refer to the Performance Tester Errors section of this document. 3. The results of your End User s tests are also available to you via WOOSH. The Fault Report code must be set to slow speed, EU Performance Problem, or QoS Performance Problem, depending on the service. 4. Java must be installed and enabled on the web browser. 5. The PC conducting the test is connected to the broadband line to be tested. Copyright BT Plc 2010 Page 5 of 27

6 4 USING THE BT WHOLESALE PERFORMANCE TESTER 4.1 Accessing the Performance Tester The BT Wholesale Performance Tester is accessed via the following URL: The End User will be presented with following performance tester screen upon accessing the site. To conduct a test the user will be required to either enter the full telephone number (including area code) or the Service ID of their broadband service and click Go. Copyright BT Plc 2010 Page 6 of 27

7 4.2 End User Domain Validation Depending on the broadband service the End User may be asked to enter their broadband login name. This is the login for their broadband service and should be entered with their Domain name: i.e. Note: This screen may not appear for their service in which case they will be automatically directed to the next step. Copyright BT Plc 2010 Page 7 of 27

8 4.3 Performance Test in progress Once the End User has initiated the test they will be presented with different screens depending on the service being provided. Some example screens are shown below:- Screen 1 For BT IPstream fixed rate services Screen 2 - For BT IPstream Max and WBC End User Access best efforts services Note: In the above diagram it shows that a Best Effort service test in progress, a pair of bars at the top of the screen indicates the type of service being tested and progress. Copyright BT Plc 2010 Page 8 of 27

9 Screen 3 - For Assured Rate services Screen 4 For WBC Annex M services Copyright BT Plc 2010 Page 9 of 27

10 4.4 Performance Tester Results Once the test has completed successfully the test results will be displayed. Some example screens are shown below: BT IPstream Fixed Rate Services Copyright BT Plc 2010 Page 10 of 27

11 4.4.2 BT IPstream Max Best Effort and Assured Rate services Explanation of results Note: DSL Upstream connection rate - This is the upstream DSL line rate, and is the same rate that will be shown on the EU CPE or its associated software. DSL Downstream connection rate - This is the End User downstream DSL line rate, and is the same rate as shown on the EU CPE. This is the maximum raw data that can be transported across your line. Your actual throughput will always be less than this rate and this is due to overheads taken up by the higher layer protocols, retransmissions etc. and this is normal. The EU IP profile - This is the IP rate set on the BT Wholesale BRAS that the End User is connected to. The EU IP profile rate will be less than the DSL downstream connection rate due to the overheads of the IP service and this is normal. Download Speed - This is the actual rate achieved during the Performance Test. This rate will never reach the IP profile rate and this again is normal. 1. You can place your mouse cursor over the help question marks indicated in the above screen shot for an explanation to appear on screen. 2. If the End User does not subscribe to Assured Rate Services then only the Best Efforts results will be displayed on the screen above. Copyright BT Plc 2010 Page 11 of 27

12 Assured Rate Test for IPstream Max If the End User has subscribed to an Assured Rate service, the Performance Tester will test both sessions i.e. QoS and Best Effort. If a QoS session is active at the time of testing then the Performance Tester will use the already configured QoS session and Best Effort session for testing. However, if the QoS session is not active at the time of testing then the Performance Tester will first test the Best Effort session and then create QoS session for testing. After test completion, the original configuration will be restored. The results page will show both, the QoS test results and the Best Effort test results as above. NOTE: If a QoS session is already configured prior to testing then the Best Effort session bandwidth will be only the remainder of connection capacity less the QoS session bandwidth WBC Best Efforts services: In addition to the best efforts results displayed on the screenshot in section 4.4.2, a Best Efforts Classes marking will also be displayed on the Best Efforts Test results section. The additional sentence will be displayed with the results: The throughput of Best Efforts (BE) classes achieved during the test is 5.0:20.0:75.0 (SBE:NBE:PBE) WBC Best Efforts Traffic Classes WBC Best Efforts supports three classes of best efforts traffic: Priority Best Efforts (PBE) Normal Best Efforts (NBE) Sub Best Efforts (SBE) Under normal circumstances Priority Best Efforts will be given a higher priority through the network over Normal Best Efforts and Sub Best Efforts. Traffic marked with Normal Best Efforts will be given priority over Sub Best Efforts. Using these markings has no effect on the overall amount of Best Efforts bandwidth available to each end user it only affects the relative priority of the 3 markings within the best efforts allowance. The relative priority of the three markings is set to 5:20:75 (SBE:NBE:PBE) meaning that under full load of all 3 classes then Sub Best Efforts will receive 5% of the available bandwidth, Normal Best Efforts 20% of the available bandwidth and Priority Best Efforts 75% of the available bandwidth. If some of the markings are not present the remaining traffic can expand to fill the available bandwidth so for example if just: SBE and NBE were present then SBE would receive 20% of the available bandwidth and NBE 80% (i.e. the 5:20 ratio would be preserved). Only NBE was present 100% of the bandwidth would be available to it. CP s may choose to use these markings to prioritise traffic being sent to End User. For example marking voice traffic with NBE, web browsing with PBE and file downloads with SBE. For more information regarding WBC traffic classes please see the WBC Handbook. Copyright BT Plc 2010 Page 12 of 27

13 4.4.4 WBC Annex M To support WBC Annex M an upstream test will be performed. The Performance Tester will automatically identify a WBC Annex M service and perform a performance test on the upstream route, in addition to the downstream tests. Copyright BT Plc 2010 Page 13 of 27

14 4.5 Additional Tests If the tester believes that the first test was unsuccessful then a second test will be suggested. Example screen shots are shown below: Best Effort service and Assured Rate (IPstream and WBC) TAP1 is completed however another test is required. Copyright BT Plc 2010 Page 14 of 27

15 Best Effort service, Assured Rate and Annex M (WBC) TAP1 is completed however another test is required. Please Note: If TAP2 is not needed or compatible with the End Users network type, they will be automatically directed to the TAP3. In such a case, please follow TAP3 instructions. Copyright BT Plc 2010 Page 15 of 27

16 4.5.1 TAP2 If the End User needs to complete TAP2 then they will need to logoff their broadband connection and re-connect using the login ID shown below. Please note an End User may need assistance to complete this procedure. They will need to locate their connection setting folder on their PC or open the configuration screen of their router (depending on the type of CPE being used). The connection username will need to be changed to: where <yourisp> is the domain name. For Example if the username is then the username would need to change to Windows 98 Screen Shot Windows XP Screen Shot Copyright BT Plc 2010 Page 16 of 27

17 Windows Vista Screen Shot After re-connection, select Go to proceed with TAP2. A screen similar to the ones shown in section 4.3 will be presented while the Performance Tester conducts the additional test. TAP2 Results If TAP2 completes successfully then a screen similar to the ones in section 4.4 will be displayed quoting the throughput results of the test. However if TAP2 has also proven to be inconclusive then an additional and final test will be recommended, TAP3. Copyright BT Plc 2010 Page 17 of 27

18 4.5.2 TAP3 If the End User needs to complete TAP3 then they will have to alter their modem/router configuration settings and enter a new username and password. Please note the End User may need assistance to complete this procedure. The connection username will need to be changed to: speedtest@speedtest_domain. The password field should be left empty. Windows 98 Screen Shot Windows XP Screen Shot Copyright BT Plc 2010 Page 18 of 27

19 Windows Vista Screen Shot After the End User has reconnected they will need to click Go to continue with the test. A screen similar to the ones shown in section 4.3 will be presented while the Performance Tester conducts the final test. TAP3 Results If TAP3 completes successfully then a screen similar to the ones in section 4.4 will be displayed quoting the throughput results of the test. If the broadband service is performing poorly the End User will be advised to raise a fault with their Service Provider stating that the BT Wholesale Performance Tester indicates a poor service throughput. Copyright BT Plc 2010 Page 19 of 27

20 5 TEST RESULT INTERPRETATION As the tests carried out by the BT Wholesale Performance Tester covers the BT Wholesale network, the Service Provider s network and the Internet, the results can be influenced by a number of factors. These include: Time of Day BT Wholesale network utilisation Service Provider network utilisation The use of a VPN or corporate network End User wiring End User equipment Use of wireless networking using IEEE b (up to 11 Mbps) Local Environment issues (such as Random Electrical Impulse Noise - R.E.I.N) Traffic being generated at the time the test was carried out. 6 BEST PRACTICE BT Wholesale advise that all throughput related complaints from End Users should be investigated primarily by using the BT Wholesale Performance Tester. Your End Users should be advised to conduct tests using BT Wholesale Performance Tester first and then contacting you if they think they have a throughput related fault. When investigating a throughput related complaint, consideration should be made with regards to: the volume of End User IP traffic through BT s broadband platform the number of End User across your own network bandwidth of your own network traffic congestion It is suggested that you should educate your End Users on what the expected performance of the product should be and whether a fault exists or not. Copyright BT Plc 2010 Page 20 of 27

21 7 OBTAINING HELP The End User can obtain additional help information by clicking on the question mark on the Performance Tester screens ( ). Further help for Communication Providers is available from the SP helpdesk on (spwoosh@bt.com ). Please Note, this number is not for End Users. Any End Users contacting this number will be referred back to their CP. Copyright BT Plc 2010 Page 21 of 27

22 8 PERFORMANCE TESTER ERRORS 8.1 Validation/System Errors Messages The following error messages may be returned to the End User. Error Message Text The browser session has timed out. Please refresh the main Performance Tester page. The Performance Tester could not perform Assured Rate throughput test, please try again later. Two consecutive attempts have failed to initialise an Assured Rate session for your service. Please raise a fault with your service provider stating that the Performance Tester tool indicated a problem with initialising your Assured Rate session. You have attempted a repeat test within 1 hour of the test providing results on your circuit. Please allow a minimum of 1 hour between tests. The login/user name entered on this tool doesn't match that discovered by querying the network for your telephone number. Please check your telephone number (or user name) and try again. If problem persists please contact your service provider. If user runs the test with Service ID and Telephone Number: The login/user name entered on this tool doesn't match that discovered by querying the network for your Telephone Number/Service ID. Please check your telephone number (or user name) and try again. If problem persists please contact your service provider. The IP address discovered on the network associated with your telephone number xxxxx, did not match the one we have logged from this browser/connection. Please check your telephone number and ensure that no one else is using the same broadband connection at the time you run a speed test. Try again and if problem persists please contact your service provider. If user runs the test with Service ID and Telephone Number: The IP address discovered on the network associated with your telephone number xxxxx/service ID xxxxxx did not match the one we have logged from this browser/connection. Please check your telephone number and Service ID and ensure that no one else is using the same broadband connection at the time you run a speed test. Try again and if problem persists please contact your service provider. Performance Tester was not able to find all the network details required for telephone number: xxxxxxx. Please check that it is the correct telephone number for your service, and ensure that the PC you are using to run the speed test is connected to your broadband connection. Try again and if the problem persists then please contact your service provider. If user runs the test with Service ID and Telephone Number: Performance Tester was not able to find all the network details required for telephone number: xxxxxxx/service ID: xxxxx. Please check that it is the correct telephone number and Service ID for your service, and ensure that the PC you are using to run the speed test is connected to your broadband connection. Try again and if the problem persists then please contact your service provider. The Performance Tester is currently unable to run a speed test for your broadband connection. Please try again shortly, however if this problem persists, raise the issue with your service provider. Error Message Text cont Copyright BT Plc 2010 Page 22 of 27

23 Performance Tester is unable to run the speed test for your telephone number: xxxxxxxxxxx. Please check that it is the correct telephone number for your service. Did you follow all the instructions given on the website, before initiating the speed test. If not, then please follow all the instructions carefully and try to run the test again. If you believe it is the correct number for your service and you have followed all the instructions then please ask your Service Provider whether you can use Performance Tester to test your Broadband speed. If yes, then ask him for the Service ID of your broadband connection and try again with this Service ID along with your Telephone Number. If this problem persists, raise the issue with your service provider. If user runs the test with Service ID and Telephone Number: Performance Tester is unable to run the speed test for your telephone number: xxxxxxxxxxx and Service ID: xxxxxxxxxxxx. Please check that it is the correct telephone number/service ID for your service. Did you follow all the instructions given on the website, before initiating the speed test. If not, then please follow all the instructions carefully and try to run the test again. If you believe it is the correct telephone number/service ID for your service and you have followed all the instructions then please ask your Service Provider whether you can use Performance Tester to test your Broadband speed. If this problem persists, raise the issue with your service provider. Performance Tester is unable to run the speed test for your telephone number: xxxxxxxxxxx and Service ID: xxxxxxxxxxxx. Please check that it is the correct telephone number/service ID for your service. Did you follow all the instructions given on the website, before initiating the speed test. If not, then please follow all the instructions carefully and try to run the test again. If you believe it is the correct telephone number/service ID for your service and you have followed all the instructions then please ask your Service Provider whether you can use Performance Tester to test your Broadband speed. If this problem persists, raise the issue with your service provider. 8.2 Java not installed or enabled In-order to use the BT Wholesale Performance Tester Java must be installed and enabled on the users internet browser. The following screen will be displayed if Java is not installed. Copyright BT Plc 2010 Page 23 of 27

24 9 FAQ An FAQ section is available to End Users from within the BT Wholesale Performance Tester. A full list of questions and answers is shown below. Q1. What does Broadband Performance Tester do? A1. The Broadband Performance Tester will enable you to test the performance of your broadband service and can assist your Service Provider in determining if you have a problem with your service. Because there are many factors that could influence broadband performance the BT Performance Tester can be used to establish whether its performance is consistent. To do this you may need to carry out a number of tests - preferably at different times of the day as there will be times when performance is affected by Peak Periods. The results of each test will be recorded so that they can be used to assist with any resulting fault investigation. If you wish to discuss the results of a test you will need to call your Service Provider. Q2. What types of faults or problems, the Broadband Performance Tester can help me with? A2. The Broadband Performance Tester has been designed to help you with performance related problems. This is where your service is working but appears to be doing so very slowly e.g. your downloads are taking far too long, your internet service keeps stopping or your gaming is too slow etc. Sometimes performance related issues are not caused by your broadband service, but as a result of recent changes to your service or any existing constraints. Q3. What are the pre-requisites for using the Performance Tester? A3. Before you can use the Performance Tester: a) Please ensure that your broadband modem or router must be in sync. This means that the indicator light on your modem or router (this is the box that connects to your Copyright BT Plc 2010 Page 24 of 27

25 telephone line) is lit steadily (i.e. not blinking) and that you are able to access your broadband service i.e. you can browse to websites. If either of the two above conditions is not met, then there may be another problem with your service which should be reported to your Service Provider. b) Follow these instructions before initiating the speed test: I. Your PC is connected to the Broadband line linked with the telephone number or Service ID you enter to run the test. II. Please close all other applications/browsers that are running on your PC. III. IV. Do not download any other files using any internet/voice applications. Please ensure that no one else is using this broadband connection/account for the duration when you are running the speed test. Q4. What do the different speeds shown in the test results mean? A4. Explanation of results (figures shown are for example purposes only): Download Speed is 450 Kbps. This is the actual rate achieved during the Performance Test. This rate will never reach the IP profile rate and this is normal. Acceptable range of speeds is Kbps. If your download speed lies in this range, then there is no fault on your line and your Broadband service is deemed to be working fine. DSL Upstream connection rate is 500 Kbps. This is the upstream DSL line rate, and is the same rate that will be shown on the EU CPE or its associated software. DSL connection rate - Downstream is 1000 Kbps. This is the End User downstream DSL line rate, and is the same rate as shown on the EU CPE. This is the maximum raw data that can be transported across your line. Your actual throughput will always be less than this rate and this is due to overheads taken up by the higher layer protocols, retransmissions etc. and this is normal. The EU IP profile rate is 500 Kbps This is the IP rate set on the BT Wholesale BRAS that the End User is connected to. The EU IP profile rate will be less than the DSL downstream connection rate due to the overheads of the IP service and this is normal. Assured Rate IP Profile* is 500 Kbps - This is the IP rate for the QoS session, set on the BT Wholesale BRAS that the End User is connected to. Assured Rate download speed* is 450 Kbps - This is the actual assured rate achieved during the Performance Test. This rate will never reach the Assured Rate IP profile rate and this is normal. The throughput of Best Effort (BE) classes* achieved during the test is 5:20:75 (SBE:NBE:PBE) These figures represent the percentage ratio while sententiously passing Sub BE, Normal BE, and Priority BE marked traffic through the network. Total download speed achieved during the Best Effort test is sum of these three types of Best Effort traffic that were passed through the network for your broadband connection. * You may not see these speeds in your test results as it depends on the type of broadband service you are using. Q5. What do Test1 (TAP1), Test2 (TAP2) and Test3 (TAP3) in Performance Tester test and is it useful to run all three tests? A5. The test solution comprises of testing performance from three points in the network and hence three tests - TEST1, TEST2 and TEST3. All three tests are applicable for BT Central Classic (LNS or LTS) access and only TEST1 and TEST3 are applicable for Central Plus and Central Plus TMaN access and all WBC EUs. TEST1 (TAP1) will determine whether the performance problem experienced by the EU is caused by traffic on the Internet, high utilization of the target application server or whether there is an actual performance problem in either SPs or BTs network. TEST2 (TAP2) will determine whether the performance problem experienced by the EU is caused by the SPs network or BTs network. This test is only applicable for SPs with BT Central Classic (LNS or LTS) access. TEST3 (TAP1) will determine whether the performance problem is caused by either the congestion in the Copyright BT Plc 2010 Page 25 of 27

26 access VP, errors at the DSL/ATM layers within the access, or the EU premises. Further tests are required and can be carried out only if the previous test indicates a possibility of some performance issue on the network. It is important to run all the required tests to help your ISP diagnose where the fault lies in the network. Q6. What is Service ID and how can I find what is the Service ID for my broadband connection? A6. Service ID is another identifier like your telephone number that uniquely identifies your broadband service. You need to call your ISP to get the Service ID for your Broadband service. Q7. Do I always need to enter Service ID? A7. If you face some problems running the test with your telephone number for e.g. if you get an error Performance Tester is unable to run the speed test for your telephone number: xxxxxxxxx. Please check that it is the correct telephone number for your service. Did you follow all the instructions given on the website, before initiating the speed test. If not, then please follow all the instructions carefully and try to run the test again. If you believe it is the correct number for your service and you have followed all the instructions then please ask your Service Provider whether you can use Performance Tester to test your Broadband speed. If yes, then ask him for the Service ID of your broadband connection and try again with this Service ID along with your Telephone Number. If this problem persists, raise the issue with your service provider., then you need to enter both your telephone number as well as the Service ID to conduct the test. Otherwise you should be able to run the speed test with telephone number alone. Q8. What should I do if I am not able to find/follow the instructions for additional test configurations? A8. You may not find the instructions for additional test configurations because of following reasons: a) You are using an Operating System different from Windows 98, Windows XP and Windows Vista. b) You are using a broadband connection that is always on, meaning it is always active and doesn t require you to sign-in. Please call your ISP to assist you with changing these settings. Q9. I am not able to see the message PERFORMANCE TESTER Your Details will be verified after clicking on GO button at the top of my screen. A9. Performance Tester uses Java Applet for running the speed test on your PC. So Java must be installed on your PC for the Performance Tester to work. If the message PERFORMANCE TESTER Your Details will be verified after clicking on GO button does not appear and instead you see a grey box or blank space, you may not have a Java Runtime Environment installed or correctly configured on your PC. You can get the latest version of Sun JRE, available for Windows, Linux, OS X, Solaris and other operating systems, here. After installing JRE, open a new browser window and access now. If you still face the same problem please visit this website: to further troubleshoot. Q10. Whom can I contact for any further queries I may have? A10. You can send your queries at support.bbpt@bt.com Copyright BT Plc 2010 Page 26 of 27

27 10 GLOSSARY Acronym Expansions BBIP Broadband IP service identifier EU End User IP Internet Protocol BRAS Broadband Remote Access Server SP Service Provider CP Communications Provider PT Performance Tester VPN Virtual Private Network WBC Wholesale Broadband Connect NBE Normal Best Efforts PBE Priority Best Efforts SBE Sub Best Efforts 11 DOCUMENT HISTORY Issue Date 1 September November 2006 Notes First issue of BT Wholesale Performance Tester Inclusion of Advanced Services tests 3 June 2009 Inclusion of BT Wholesale Broadband Connect Best Efforts Traffic classes (PBE:NBE:SBE) 4 August 2009 Improvements to PT screens and usability 5 August 2009 Format Changes 6 Inclusion of Annex M screen shots and test routing diagrams. Copyright BT Plc 2010 Page 27 of 27