1

The information contained in this Presentation is confidential information as per your terms and conditions with British Telecommunications plc (BT).

Please treat it accordingly and do not forward, republish or permit unauthorized access.

BT reserves the right to make changes to the information in this Presentation at any time without further notice.

BTW Planned Engineering Works 90 day overview July 2013 to September 2013These dates are indicative dates only and not to be used for any forecasting purposes as they are all subject to change. Please ensure that you wait for formal notifications from IRAMS.

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BTW 2012 Network Changes – 3 month rolling plan

• Whilst BTW has continually worked to enhance its network, we are currently undergoing an exceptional level of change driven by four main drivers:-

– Stability – to improve the reliability of the network, BTW is targeting certain network elements with hardware and software improvements.

– Capacity – the need for additional capacity is driven by an increase in the number of broadband users on the 21C network (through migration from 20C and growth) and also by the ever-increasing bandwidth demands of those users.

– Resilience –to improve the resilience of the network , BTW is actively removing single points of failure from the network – New Functionality – to meet the needs of the market BTW needs to enhance its network to deliver the services its

customers require.

• This presentation outlines the key upgrade programmes, their drivers, customer impact and the number of upgrades per programme per week.

• BTW is keen to deliver all the required improvements as quickly as possible whilst actively managing the risk to customers. For this reason a range of run-rates against each programme has been outlined. The actual run-rates achieved will be determined by this ongoing live analysis of risk.

• Customer outage times for the PEWs start between 00:01 and 02:00 with the aim of completing customer impacting work by 06:00. This allows 2 hours for roll-back should the PEW be unsuccessful.

• Business as usual capacity upgrades and upgrades to resilient structures have not been listed here.

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Customer Service / BTID Network Change - Executive Summary

21c BRAS Upgrades Programme No 37

SE800 11.1.2.5p8 Software upgrade - status update• The following dashboard provides overall status of the upgrade program with projected completion

22nd July:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16Birmingham 30-Apr-13 01-May-13 01-May-13 01-May-13 30-Apr-13 30-Apr-13 30-Apr-13 01-May-13 03-May-13 03-May-13 01-May-13 30-Apr-13Bristol 25-Apr-13 25-Apr-13 25-Apr-13 26-Apr-13 29-Apr-13 29-Apr-13 26-Apr-13 26-Apr-13 26-Apr-13 25-Apr-13 25-Apr-13 26-Apr-13 26-Jun-13Cardiff 24-Apr-13 24-Apr-13 24-Apr-13 19-Jun-13 19-Jun-13 19-Jun-13 19-Jun-13 24-Apr-13 24-Apr-13 30-Apr-13Colindale 21-Mar-13 22-Mar-13 22-Mar-13 19-Jun-13 27-Mar-13 27-Mar-13 26-Mar-13 26-Mar-13 27-Mar-13 27-Mar-13 03-May-13 26-Mar-13 26-Mar-13 03-May-13 21-Mar-13 01-Jul-13Derby 14-May-13 03-Apr-13 08-Apr-13 08-Apr-13 03-Apr-13 03-Apr-13 03-Apr-13 03-Apr-13 05-Jul-13Falkirk 28-Jun-13 23-May-13 28-Jun-13 24-May-13 24-May-13 23-May-13 28-Jun-13 04-Jul-13Faraday 29-May-13 31-May-13 29-May-13 29-May-13 29-May-13 30-May-13 30-May-13 29-May-13 30-May-13 30-May-13 31-May-13 31-May-13 31-May-13 31-May-13 New BuildGlasgow 24-Jun-13 24-Jun-13 27-Jun-13 25-Jun-13 25-Jun-13 25-Jun-13 25-Jun-13 26-Jun-13 26-Jun-13 26-Jun-13 26-Jun-13 26-Jun-13 27-Jun-13 25-Jun-13 27-Jun-13 27-Jun-13Guildford 16-Apr-13 16-Apr-13 15-Apr-13 17-Apr-13 15-Apr-13 16-Apr-13 15-Apr-13 17-Apr-13 16-Apr-13 17-Apr-13 17-Apr-13 15-Apr-13 17-Apr-13 New Build New BuildLeeds 04-Jul-13 04-Jul-13 19-Jul-13 05-Apr-13 05-Apr-13 05-Apr-13 04-Jul-13 05-Apr-13 05-Apr-13 04-Jul-13 11-Jul-13Manchester 12-Apr-13 12-Apr-13 12-Apr-13 12-Apr-13 11-Apr-13 11-Apr-13 11-Apr-13 11-Apr-13 11-Apr-13 10-Apr-13 12-Apr-13 10-Apr-13 10-Apr-13Milton Keynes 20-Jun-13 20-Jun-13 20-Jun-13 20-Jun-13 21-Jun-13 21-Jun-13 10-May-13 10-May-13 09-May-13 21-Jun-13 10-May-13 10-May-13 20-Jun-13 15-May-13Newcastle 12-Mar-13 12-Mar-13 13-Mar-13 19-Mar-13 19-Mar-13 29-Apr-13 14-Mar-13 13-Mar-13 12-Mar-13 04-Jul-13Peterborough 30-Jan-13 16-Jan-13 30-Jan-13 31-Jan-13 31-Jan-13 22-Jan-13 01-Feb-13 08-Mar-13 26-Nov-12 29-Jan-13 29-Jan-13 15-Jul-13 New BuildPreston 18-Apr-13 18-Apr-13 10-Jul-13 10-Jul-13 10-Jul-13 10-Jul-13 08-Jul-13 08-Jul-13 18-Apr-13 18-Apr-13 22-Jul-13 18-Apr-13 New BuildSheffield 11-Jun-13 11-Jun-13 11-Jun-13 10-Jun-13 10-Jun-13 10-Jun-13 11-Jun-13 10-Jun-13Slough 22-Feb-13 22-Feb-13 26-Feb-13 28-Feb-13 01-Mar-13 05-Mar-13 06-Mar-13 08-Mar-13 27-Feb-13 27-Feb-13 28-Feb-13 01-Mar-13 05-Mar-13 26-Feb-13 06-Mar-13 29-Apr-13Southbank 16-May-13 16-May-13 14-May-13 14-May-13 15-May-13 15-May-13 17-May-13 14-May-13 14-May-13 15-May-13 17-May-13 17-May-13 15-May-13 16-May-13 17-May-13 11-Jul-13Stepney Green 03-Jun-13 03-Jun-13 04-Jun-13 05-Jun-13 07-Jun-13 04-Jun-13 04-Jun-13 05-Jun-13 05-Jun-13 05-Jun-13 07-Jun-13 07-Jun-13 07-Jun-13 04-Jun-13 05-Jun-13 04-Jun-13Wolverhampton 22-Jul-13 23-Nov-12 09-Jul-13 09-Jul-13 05-Jul-13 05-Jul-13 05-Jul-13 09-Jul-13 05-Jul-13 09-Jul-13 18-Jun-13

CompleteOn planNew build = New BRAS installations planned to address growth as required. Theses will be installed with latest 11.1.2.5p8 SEOS softwareRe-planned = Postponed, e.g. where pre-checks I have identified technical issue requiring resolution before upgrade. Specified date is the revised date.

POSI SiteBRAS Number

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Customer Service / BTID Network Change - Executive Summary

New Deployments May – July 2013

Prog

No:

Upgrade Key Drivers Total Upgrades

Average EU Impact per upgrade

Affected Products

Average EU outage (Mins)

Upgrades per week

Target Months Targat End

June

July

Aug

Sep

500G IEA chassis upgrade

Scaling 4 port 10G line-card

TBC TBC TBC TBC TBC TBA

21c EES, EEA, IEA, MSE Upgrade

Vendor support, Functionality

Approx 2500. 6000 HE, WBMC, WBC

20 75 Dec 13

40

45

21C UpgradesProg No:

Upgrade Key Drivers Upgrades Complete / Total

EUs per upgrade

Upgrades per PEW

Affected Products

Av. End user outage (Mins)

Upgrades per week

Progress Planne

d EndM

ayJun

July

Aug

SVLAN moves

Capacity,Stability

Ongoing Av 800Min 0

Max 1000

9 WBC 35 Up to 75 Ongoing

BRAS 11.1.2.5 P8 Upgrade

Functionality (IPv6), stability.

243/243 BB EU’s per BRAS

Av 35000Max 45000

6 WBC / WBMC

45 Up to 24

Jul 13

2nd Vendor MSPE Software Upgrades

Functionality(LAG Support)

21/67 Non Service Impacting

0 None 0 4

Nov 13

7750 R10 Upgrade

Features (Ipv6), Vendor Support

2/2500 Variable 1 HE, WBC, WBMC

15 80May

14

High ThroughputBEA-VS

Capacity 11/20 Av 120K 1 WBC / WCC

45 mins 1 Jun-14

6

SVLAN moves - these moves offload SVLAN’s (bundles of Broadband traffic) from one BRAS to another. This is carried out to alleviate capacity issues mplet

37 21C BRAS upgrades to support IPv6 and improve stability

38Supports LAG functionality and also improved resilience performance.

39Required to support IPv6 and due to current software going end of support

22

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Ongoing 20C Upgrades Cont’d

Prog No:

Upgrade Key Drivers Upgrades Complete / Total

EUs per upgrade

Upgrades per PEW

Affected Products

Av. End user outage (Mins)

Upgrades per week

Progress Planne

d End

May

June

July

Aug

ERX BRAS12.3

EoL 23/225 Av 11000Min 3000

Max 18000

2 IPSC 20 8 Jul 14

DSLAM SDH Bypass (MSIP Closure)

MSIP Platform Closure

242/4620 700 15 IPSC 10 60Sep 14

49

46

7

Completed 20C Upgrades

1

14

2

10k BRAS SB11 Stability 122/122 Av 11000Min 3000

Max 18000

6 IPSC Up to 18 Apr 1336

8

Completed 21C Upgrades

Progr No:

Upgrade Key Drivers

Upgrades Complete / Total

BB EUs and/or Ethernet Circuits per upgrade

Upgrades per PEW

Affected Products

Av. End user outage (Mins)

Upgrades per week

Date Ende

d

Copper MSAN Upgrade

Functionality

5594/5594 Non-Customer Impacting

Up to 120

None 0 Up to 480 Dec 11

EAD Chassis Code Upgrade

Stability 6950/6950 Up to 15 Ethernet Circuits

Up to 200

Ethernet,Mobile

Ethernet

<1 Up to 1000

Feb 12

21C BRAS Core Migration

Capacity 151/151 Non Customer Impacting

Up to 12 WBC 0 16-30 Feb 12

BEA VS Card Upgrade

Capacity 20/20 – Complete

Non-Customer Impacting

1 None 0 Up to 4 Mar 12

DDR Hardware replacement

Stability 200/200 Non Customer impacting

10 None 0 50 May 12

15

16

3

17

28

9

Completed 21C Upgrades

Progr No:

Upgrade Key Drivers

Upgrades Complete / Total

BB EUs and/or Ethernet Circuits per upgrade

Upgrades per PEW

Affected Products

Av. End user outage (Mins)

Upgrades per wee

Date Ende

d

EAD Chassis Code Upgrade

Stability 6950/6950 Up to 15 Ethernet Circuits

Up to 200 Ethernet,Mobile

Ethernet

<1 Up to 1000

Feb 12

21C BRAS Core Migration

Capacity 151/151 Non Customer Impacting

Up to 12 WBC 0 16-30 Feb 12

BEA VS Card Upgrade

Capacity 20/20 – Complete

Non-Customer Impacting

1 None 0 Up to 4 Mar 12

DDR Hardware replacement

Stability 200/200 Non Customer impacting

10 None 0 50 May 12

MPLS Core Router Upgrades

Code Update 109/109

Av 20000Min 0

Max 100000

1 WBMC180

(240 Max)

1-4 Jun12

16

3

17

28

11

10

Completed 21C Upgrades

Progr No:

Upgrade Key Drivers

Upgrades Complete / Total

BB EUs and/or Ethernet Circuits per upgrade

Upgrades per PEW

Affected Products

Av. End user outage (Mins)

Upgrades per week

Date Ende

d

High ThroughputBEA-VS

Capacity 5/5 Av 120K 1 WBC / WCC

45 mins 1 Jun 12

BRAS software Upgrade

Stability 193/193 Av 17000Max 32000

1 WBC / WBMC/

WCC

45 mins Up to 50 Jul 12

Copper MSANSoftware Upgrade

Stability / Capacity

5844/5844 Average 700

120 WBC /WBMC

30 mins 480 May 12

2nd vendor MSAN Upgrade

Stability 702/702 Average 700

40-50 WBC / WBMC/WCC

40 mins 200 - 250 Jul 12

2nd Vendor MSPE

Stability 51/51 Av 20k 1 WBC / WCC /

Ethernet

30 secs – 2 mins

2 Jan 13

22

26

27

30

23

Broadband Services on 21CN

12

46

9

11

14

20 22

23

2628

29

31

3227

3834

40 3435

36

3739

44

4545

45

45

46

47 48

1150

4946

39

39

12

Ethernet Service on 21CN

13

Descriptions

14

Management of risk