Wholesale Optical Product handbook. March 2018 Version 7

Wholesale Optical Product handbook March 2018 Version 7

Contents Page 1 Wholesale Optical overview 4 2 Wholesale Optical description 5 2.1 introduction 5 2.2 introduction 7 2.3 Customer access and interface presentation 8 2.4 Service bandwidths supported and interface types 10 2.5 Wholesale Optical services 12 2.5.1 BT core node to BT core node 12 2.5.2 On-net data centre node to On-net data centre node 13 2.5.3 BT core node to On-net data centre node 14 2.5.4 Customer site to customer site 15 2.5.5 Customer site to BT core node service 22 2.5.6 Customer site to On-net data centre node service 27 2.6 Network terminating equipment 32 2.7 Resilience Options 32 2.7.1 Standard service 33 2.7.2 Resilience Option 1 Service 33 2.7.3 Resilience Option 2 Service 34 2.8 Supplier information notes 36 2.9 Performance and Class of Service 36 3 BT Wholesale Optical service availability and performance 37 3.1 Service availability 37 3.2 Repair times 37 3.3 Packet Loss 37 3.4 Service bandwidths supported and interface types 38 3.5 Security accreditation 38 3.6 Service credits 38 3.6.1 Late delivery credit 38 3.6.2 Service level agreement breach credit 39 3.7 Optical route maps 39 4 Wholesale Optical commercials 40 4.1 Pricing 40 5 Wholesale Optical processes 41 5.1 Service order types 41 5.1.1 Provide 41 Page 2 of 53

5.1.2 Cease 41 5.1.3 Migrate 41 5.1.4 Upgrade 41 5.1.5 Modify 42 5.1.6 Amend 42 5.2 Placing an order 42 5.3 Contractual delivery date 42 5.4 Order progress and delivery timelines 43 5.5 Excess construction charges 43 5.6 End to End testing 44 5.7 Customer service plan and handover document 44 6 Wholesale Optical fault management 45 6.1 Raising a fault 45 6.2 Proactive fault management 45 6.3 Planned engineering works (PEW) 45 7 Wholesale Optical billing 46 8 BT Wholesale contact information 47 9 Glossary of terms 48 10 Document change control 49 Annex A 49 On-net data centres 52 Page 3 of 53

1 Wholesale Optical Overview Wholesale Optical delivers high bandwidth symmetric, point to point connectivity between customer equipment installed at the following locations:- BT exchanges Customer s own premises Third party locations including data centres and UK cable landing stations. Table 1 shows the customer facing interfaces supported by Wholesale Optical Ethernet Fibre Chanel Transport 10GE 1Gb OTU2 40GE 2Gb OTU2e 100GE 4Gb OTU4 8Gb 10Gb Table 1: Client interfaces supported Wholesale Optical is delivered using Ciena 6500 Dense Wave Division Multiplexing (DWDM) Reconfigurable Optical Add Drop Multiplexers (ROADMs) installed in the BT Core Nodes and at key third party locations including data centres, enabling a secure, always on, UK national service (excluding Kingston upon Hull, Isles of Scilly and the Channel Isles) to be provided. The ROADMs enable BT to configure customer connections across BT s 21CN optical core network from a central network operations centre. Wholesale Optical has a minimum end-to-end target availability of 99.7%, a maximum one way latency of <6ms, and includes a 24/7 maintenance package within tariff, subject to BT s terms and conditions for the service. Page 4 of 53

2 Wholesale Optical Description 2.1 Introduction A Wholesale Optical solution is comprised of two primary components 1. Core network optical connectivity between Ciena 6500 DWDM multiplexers that form the 21CN optical core network. 2. Access connectivity from the customer s equipment to the nearest Ciena 6500 DWDM multiplexers The core Ciena 6500 DWDM multiplexers (Optical Points of Presence) are installed at BT Core Nodes, and key third party locations including public data centres and UK cable landing stations. This breadth of coverage enables BT Wholesale to deliver a national, high bandwidth service. The DWDM wavelengths between the Optical Points of Presence (PoPs) are 100Gb, and can either be shared across several customers or dedicated to a single customer depending on customers requirements. Each fibre between two Optical PoPs can support up to 88 wavelengths. Annex A provides a list of BT Core Nodes and third party locations where BT s Ciena 6500 Optical PoPs are installed. The access connectivity from the customer s equipment to the nearest Ciena 6500 Optical PoP is determined by the location of the customer s equipment. Table 2 shows the access product options and NTE provider depending on the location of the CPE. Customer Equipment Location Access Solution NTE provider Notes BT Core Node Openreach Internal Cablelink N/A Non BT Core Node BT exchange Openreach EBD Openreach On net data centre * Data centre fibre cross connect N/A Customer s responsibility to order fibre cross connect Off net data centre Openreach EAD, OSA or OSEA6500 depending on customer requirements Openreach Customer premise Openreach External Cablelink N/A Customer has fibre between own premises and nearest 21CN Core/Metro Node Customer premise Openreach EAD, OSA or OSEA6500 depending on customer requirements Openreach Table 2: Access product options and NTE provider * An on-net data centre is a non BT owned data centre where BT has installed a Ciena 6500 Optical PoP. A list of the on-net data centres is provided in Annex A Page 5 of 53

More details of the access solutions and how they would be deployed are given in Section 2.5. Details and descriptions of the Openreach access products can be found on the Openreach website www.openreach.co.uk When deployed in public data centres, whether on-net of off-net, or cable landing stations it is the customer s responsibility to arrange for fibre connectivity from their equipment to the Wholesale Optical PoP. Because Wholesale Optical is a layer 1 transport solution, all Ethernet, MPLS and IP packet header information including VLAN information, IP addresses, MPLS labels, QoS, etc are carried transparently by the product. Wholesale Optical can carry Ethernet jumbo frames up to 9000 bytes long, but does not support sub-rating of bandwidth, eg 2GB of bandwidth over a 10Gb circuit. The customer gets the full 10GB of bandwidth on a 10Gb circuit. Figures 1-4 below show some example Wholesale Optical solutions and when the different access products might be used. Figure 1: Wholesale Optical where the customer equipment is located in the MUA space of a BT Core Node at both ends. Figure 2: Wholesale Optical where the customer equipment is located in an on-net data centre at one end and their own premises at the other end. Page 6 of 53

Figure 3: Wholesale Optical where the customer equipment is located in the MUA space of a BT Core Node at one end and their own premises at the other end. Figure 4: Wholesale Optical where the customer equipment is located in their own premises at both ends. 2.2 Introduction Wholesale Optical product is delivered as a point to point circuit over the 21CN core DWDM network as shown in figure 5 below. Figure 5: End to end Wholesale Optical solution. Although only the Ciena 6500 Optical PoPs that connect to the customer s equipment are shown in figure 5, and in the other solution diagrams throughout this product handbook, the routing of the wavelength across the 21CN optical core network may be via none, one or more intermediate BT Core Nodes. Ideally, the wavelength will pass all-optically through any intermediate BT Core Nodes and will be the same wavelength and frequency end-to-end. However, if the path length is too great and/or there are too many intermediate BT Core Node hops, the accumulation of optical losses may force the electrical regeneration of the wavelength. This is done using back-toback wavelength transponder cards where the connection between the cards is at OTU level, i.e. the signal is not Page 7 of 53

broken back to client interface level. This regeneration is a Business As Usual (BAU) capability on the 21CN optical core network. 2.3 Customer Access and Interface Presentation The Wholesale Optical service handoff to the customer s equipment (CPE) will be determined by the location of the customer s equipment and the resilience option required. Details of the resilience options and the service levels associated with them can be found in section 2.7. Where the CPE is installed in the BT Core Node MUA space or an on-net data centre, the service handoff to the customer will be via an optical patch panel with either Standard Connector/ Angled Polished Connectors (SC/APC) or Little Connectors (LC) or Standard Connectors (SC). The SC/APCs or LCs or SCs will be the Wholesale Optical Service Demarcation Point as shown in figure 6 below. The optical patch panel can be either a standard patch panel supporting 12 SC/APCs or 12 LCs or 12 SCs, a high density patch panel supporting 24 LCs. Figure 6: CPE installed in customer s own cabinet in BT Core Node MUA space. (Standard connectivity shown). Where the CPE is installed on the customer s own premises and they have their own fibre into a BT Core Node, the service handoff to the customer will be via a cable splice in the cable chamber of the BT Core Node. The cable splice will be the BT Service Demarcation Point of the Wholesale Optical solution as shown in figure 7 below. Figure 7: CPE installed at own premises, and has own fibre installed to BT Core Node cable chamber (Standard connectivity shown). Page 8 of 53

Where the CPE is installed in an on-net data centre, the service handoff to the customer will be via an optical patch panel installed in the BT cabinet/room, cage or Meet Me Room with either Standard Connector/ Angled Polished Connectors (SC/APC) or Little Connectors (LC), Standard Connectors (SC). The location of the optical patch panel will be determined by the processes/options applied by the owner of each on-net data centre. The SC/APCs or LCs or SCs will be the Wholesale Optical Service Demarcation Point as shown in the Figure 8 below. The optical patch panel can be either a standard patch panel supporting 12 SC/APCs or 12 LCs or 12 SCs, or a high density patch panel supporting 24 LCs). Figure 8: CPE installed at on-net data centre. (Standard connectivity shown). * It is the customer s responsibility to order the fibre cross connect from the data centre owner and manage its delivery Where the CPE is installed on the customer s premises the service handoff to the customer will be the patch panel presenting the customer interface on the Openreach supplied NTE installed at the customer s premises as shown in figure 9 below. Figure 9: CPE installed at customer s premises and dark fibre access used. (Standard connectivity shown). Details and descriptions of the Openreach access products can be found on the Openreach website www.openreach.co.uk Page 9 of 53

2.4 Service bandwidths supported and interface types The Wholesale Optical product supports the following services:- Ethernet Fibre Channel Transport Table 3 shows the bandwidth options supported on the customer facing interface cards. Ethernet Fibre Chanel Transport 10GE 1Gb OTU2 (10Gb) 40GE 2Gb OTU2e (10Gb) 100GE 4Gb OTU4 (100Gb) 8Gb 10Gb Table 3: Bandwidths supported by Wholesale Optical The customer facing interface cards used will be determined by the customer s requirements, a choice of service interfaces types are offered through the different customer facing optical interfaces. Table 4 below lists the service interface types supported by Wholesale Optical. Customer Interface 1Gb FC 2Gb FC 4Gb FC 8Gb FC 10Gb FC 10GE LAN PHY 10GE WAN PHY 100GE Interface Type MX (MMF, 850nm) SM (SMF, 1310nm) MX (MMF, 850nm) SM (SMF, 1310nm) MX (MMF, 850nm) SM (SMF, 1310nm) FC800-MX-SN-I (MM 850nm) FC800-SM-LL-L (SM 1310nm) FC1200-MX-SN-I (MM 850nm) FC1200-SM-LL-L (SM 1310nm) 10GBase-LR/LW (SM 1310nm) 10GBase-ER/EW (SM 1550nm) 10GBase-LR/LW (SM 1310nm) 10GBase-ER/EW (SM 1550nm) LR4 (4x25G SM) SR4 (850nm MM) Pluggable Type SFP SFP SFP XFP or SFP+ XFP or SFP+ XFP or SFP+ XFP or SFP+ XFP or SFP+ XFP or SFP+ XFP or SFP+ XFP or SFP+ CFP CFP Page 10 of 53

SR10 (850nm MM) CFP OTU2 OTU2 / OTU2e (SM 1310nm) XFP or SFP+ OTU2e OTU2 / OTU2e (SM 1310nm) XFP or SFP+ OTU4 LR4 (4x25G SM) SR10 (850nm MM) CFP CFP Table 4: Client interfaces supported Table 5 below lists the customer facing interface types supported by Wholesale Optical and their associated power margins for both transmit and receive. Supported Client Rates Interface Type Receiver Minimum (dbm) Receiver Overload (dbm) Transmit Minimum (dbm) Transmit Overload (dbm) 1Gb Fibre Channel MM (850) -14 0 09-2.5 1Gb Fibre Channel SM (1310) -17.2-3 -11.2-3 2Gb Fibre Channel MM (850) -14 0 09-2.5 2Gb Fibre Channel SM (1310) -17.2-3 -11.2-3 4Gb Fibre Channel MM (850) -14 0 09-2.5 4Gb Fibre Channel SM (1310) -17.2-3 -11.2-3 8Gb Fibre Channel MM (850) -11.2 0-8.2 0 8Gb Fibre Channel SM (1310) -13.8 +0.5-8.4 +0.5 10Gb Fibre Channel MM (850) -11.2-1 -7.5-1 10Gb Fibre Channel SM (1310) -14.4 +0.5-8.2 +0.5 10GE LAN PHY, 10GE WAN PHY 10GE LAN PHY, 10GE WAN PHY SM (1310) -11-1 -6-1 MM (850) -11.2 0-8.2 0 100GE SM (1310) -8.6 4.5-2.3 4.5 100GE MM (850) -8.6 4.5-2.3 4.5 100GE MM (4x25G) -8.6 4.5-2.3 4.5 OTU2 SM (1310) -11-1 -6-1 Page 11 of 53

OTU2e SM (1310) -13-1 -6-1 OTU4 MM (850) -8.8 +4-2.5 +4 OTU4 MM (4x25G) -8.8 +4-2.5 +4 Table 5: Customer interface type and associated power margins 2.5 Wholesale Optical Services Wholesale Optical can be provided between the following end points. BT Core Node On-net Data Centre Node Customer Site BT Core Node Yes Yes Yes On-net Data Centre Node Yes Yes Yes Customer Site Yes Yes Yes Table 6: End Point Options for Wholesale Optical Services A BT Core Node is one of the 106 exchanges that make up BT s UK optical core network where BT has deployed a Ciena 6500 Optical PoP. A list of the BT Core Nodes is provided in Annex A An on-net data centre is a 3 rd party data centre where BT has deployed a Ciena 6500 Optical PoP. A list of on-net data centres is provided in Annex A. The client interface card provided in the Ciena 6500 Optical PoP will be determined by the customer s requirements. Table 4, section 2.4 provides a breakdown of the cards that could be used and the Wholesale Optical services each supports Table 5, section 2.4 shows the power levels on the transmitter and receiver port customer interfaces. The following examples of Wholesale Optical services are for Standard (unprotected) delivery. Please see Section 2.7 for details on the resilient service options. 2.5.1 BT core node to BT core node A Wholesale Optical Service between two BT Core Nodes will be provided using either separate client interface and wavelength transponder cards, or a combined client interface/wavelength transponder card installed into existing Ciena 6500 Optical PoPs in 21CN Core Nodes. The card(s) used will be determined by the customer s requirements. The connectivity between the Ciena 6500 Optical PoPs (located in the 21CN Core Area of the BT Core Node) and the customer equipment (located in the Multi-User Area (MUA) of the BT Core Node) will be via an Openreach Internal Cablelink product. Page 12 of 53

A list of BT Core Nodes where Ciena 6500 Optical PoPs are deployed can be found in Annex A. Figure 10 shows a 1x10GE end-end service between two BT Core Nodes. Figure 10: Core Node to Core Node Wholesale Optical Service Figure 11 shows a 4xOTU2e end-end service between two Core Nodes. Figure 11: Core Node to Core Node Wholesale Optical Service For information on the customer presentation interface at the BT Service Demarcation Point, please see section 2.3. 2.5.2 On-net data centre node to On-net data centre node The Wholesale Optical Service between two On-net Data Centre Nodes will be provided using either separate client interface and wavelength transponder cards, or a combined client interface/wavelength transponder card installed into existing Ciena 6500 Optical PoPs in On-net Data Centre Nodes. The card(s) used will be determined by the customer s requirements. The connectivity between the Ciena 6500 Optical PoPs patch panel and the customer equipment will be via a Data Centre fibre Cross-Connect. This fibre Cross-Connect will not be provided as part of the Wholesale Optical Service but must be ordered by the customer directly from the Data Centre operator; the Wholesale Optical Service handoff point will be on the BT patch panel associated with the Ciena 6500 Optical PoP. For more information see section 2.3 Page 13 of 53

Figure 12 shows a 1x10GE end-end service between two On-net Data Centre Nodes. Figure 12: On-net Data Centre Node to On-net Data Centre Node Wholesale Optical Service. Figure 13 shows a 1x10 Fibre Channel end-end service between two On-net Data Centre Nodes. Figure 13: On-net Data Centre Node to On-net Data Centre Node Wholesale Optical Service. In general, the Ciena 6500 Optical PoP will be located in the BT Room and the customer equipment will be located in the customer s room, but this depends on the situation at individual Data Centres and the processes/rules applied by each data centre owner. These rooms may be physically separate rooms or designated separate areas in the same physical room. For information on the customer presentation interface at the BT Service Demarcation Point, please see section 2.3 2.5.3 BT core node to On-net data centre node The Wholesale Optical Service between a BT Core Node and an on-net Data Centre Node will be provided using either separate client interface and wavelength transponder cards, or a combined client interface/wavelength transponder card installed into existing Ciena 6500 Optical PoPs in the BT Core Node and On-net Data Centre Nodes. The card(s) used will be determined by the customer s requirements. Figure 14 shows a 1x10GE end-end service between a BT Core Node and an on-net Data Centre Node. Page 14 of 53

An Openreach Internal Cablelink product will be used in the BT Core Node to connect the customer equipment in the MUA space to the Optical PoP, whilst a Data Centre fibre Cross-Connect will be used in the on-net Data Centre Node to connect to the customer equipment. The Data Centre fibre Cross-Connect is not provided as part of the Wholesale Optical Service; the customer must order it directly from the Data Centre operator. Figure 14: Core Node to Data Centre Node Wholesale Optical Service In general, the Ciena 6500 Optical PoP will be located in the BT Room and the customer equipment will be located in the customer s room, but this depends on the situation at individual Data Centres and the processes/rules applied by the data centre owners. These rooms may be physically separate rooms or designated separate areas in the same physical room. For information on the customer presentation interface at the BT Service Demarcation Point, please see section 2.3. 2.5.4 Customer site to customer site A Wholesale Optical service between two Customer Sites is comprised of Access connectivity from customer premise to Ciena 6500 Optical PoP in the BT Core Node Connectivity between the BT Core Nodes Access connectivity from the Ciena 6500 Optical PoP in the BT Core Node to the customer premise. Figure 15 shows the high level connectivity of a Customer Site to Customer Site solution. Figure 15: Customer Site to Customer Site Wholesale Optical Service Page 15 of 53

Section 2.5.4 specifically focusses on the different access products that can be used to provide the Customer Site to BT Core Node connectivity part of the Wholesale Optical solution. The two Customer Site to BT Core Node access products can either be the same or different depending on the customer s requirements Table 7 below shows the different access connectivity options between the Customer Site and BT Core Node at each end of the Wholesale Optical solution and any limitations that may apply, and the NTE provider for connectivity from the customer s site to the BT Core Node. Access Product Customer site B end OSEA6500 Alien (OR NTE) Customer site B end OSEA6500 Bookended (OR NTE) Customer site B end OSA (OR NTE) Customer site B end EAD (OR NTE) Customer site B end EBD (OR NTE) Customer site B end Cablelink Customer site A end OSEA6500 Alien (OR NTE) Customer site A end OSEA6500 Bookended (OR NTE) Customer site A end OSA (OR NTE) Customer site A end EAD (OR NTE) Customer site A end EBD (OR NTE) Customer site A end Cablelink Yes No No No No No No Yes Yes Yes* Yes* Yes No Yes Yes Yes* Yes* Yes No Yes* Yes* Yes* Yes* Yes* No Yes* Yes* Yes* Yes* Yes* No Yes Yes Yes* Yes* Yes Table 7: Access products supported on a Customer Site to Customer Site service * The maximum supported service on these access products is 1x10GE Where a customer s equipment is located in a third party data centre that is not a designated on-net site for Wholesale optical, this will be classed as a customer premise, and it will be the customer s responsibility to provide a cabinet to house the NTE. Customer Sites can only be parented to a BT Core Node; they cannot be parented to an On-net Data Centre Node. Details and descriptions of the Openreach access products can be found on the Openreach website www.openreach.co.uk 2.5.4.1 OSEA6500 Alien Wavelength At the Customer s premise Openreach will install an OSEA6500 chassis, either separate client interface and wavelength transponder cards, or a combined client interface/wavelength transponder card, and appropriate amplification as required. The Ciena 6500 chassis will house cards capable of supporting 10Gb, 40Gb and 100Gb Ethernet, Fibre Channel and OTU transport interfaces. Page 16 of 53

Details and descriptions of the Openreach access products, including chassis size, power and space requirement can be found on the Openreach website www.openreach.co.uk When the Openreach OSEA6500 Alien Wavelength product is used to provide connectivity from the customer s site to the nearest BT Core Node, the wavelength carrying the customer s service is generated by the Openreach NTE. The wavelength is carried across the Openreach access circuit to the BT Core Node, passing through a filter to ensure the frequency and power levels are correct, before entering the BT 21CN optical core network via the Ciena 6500 Optical PoP. The wavelength is extended across the 21CN optical core network by the Ciena 6500 Optical PoP. The wavelength will pass all-optically through the Ciena 6500 Optical PoP and be the same wavelength with the same frequency end-to-end. The choice of frequency is controlled by the 21CN core capacity management team and requested from Openreach when ordering the OSEA 6500 access products. Figure 16 shows the connectivity between an end customer s premises and the BT Core Node when an Openreach OSEA6500 Alien wavelength access product is used. Figure 16: Customer site to BT Core Node connectivity using the Openreach OSEA6500 Alien Wavelength access product. For information on the customer presentation interface at the BT Service Demarcation Point, please see section 2.3. 2.5.4.2 OSEA6500 Bookended Hand-Off At the Customer s premise Openreach will install an OSEA6500 chassis, either separate client interface and wavelength transponder cards, or a combined client interface/wavelength transponder card, and appropriate amplification as required to meet the customer s requirements. The Ciena 6500 chassis will house cards capable of supporting 10Gb, 40Gb and 100Gb Ethernet, Fibre Channel and OTU transport interfaces. Details and descriptions of the Openreach access products, including chassis size, power and space requirement can be found on the Openreach website www.openreach.co.uk. Page 17 of 53

At the BT Core Node, Openreach will install a Ciena 6500 NTE in the BT provided cabinet. The cards in the Openreach Ciena 6500 NTEs will generate a wavelength between the customer s site and the BT Core Node, which will carry the customer s services. At the BT Core node the Wholesale Optical service coming from the Customer s site will be extended by the Ciena 6500 Optical PoP which will generate a new wavelength across the 21CN optical core network. The wavelength frequencies can be different over the OSEA 6500 Bookended access product and across the 21CN optical core network. Figure 17 shows the connectivity between an end customer s premises and the BT Core Node when an Openreach OSEA6500 Bookended access product is used. Figure 17: Customer site to BT Core Node connectivity using the Openreach OSEA6500 Bookended access product. For information on the customer presentation interface at the BT Service Demarcation Point, please see section 2.3. 2.5.4.3 OSA Hand-Off At the Customer s premise Openreach will install an ADVA FSP3000 OSA NTE including appropriate amplification as required in a customer supplied cabinet. The ADVA FSP3000 chassis will house transponder cards capable of supporting 10GE, Fibre Channel and OTU2/2e transport interfaces. Details and descriptions of the Openreach access products, including chassis size, power and space requirement can be found on the Openreach website www.openreach.co.uk At the BT Core Node, Openreach will install an ADVA FSP3000 OSA NTE in the BT provided cabinet. The cards in the Openreach FSP3000 NTEs will generate a wavelength between the customer s site and the BT Core Node, which will carry the customer s services. At the BT Core node the Wholesale Optical service coming from the Customer s site will be extended by the Ciena 6500 Optical PoP which will generate a new wavelength across the 21CN optical core network. Page 18 of 53

The wavelength frequencies can be different over the OSA access product and across the 21CN optical core network. Figure 18 shows the connectivity between an end customer s premises and the BT Core Node when an Openreach OSA access product is used. Figure 18: Customer site to BT Core Node connectivity using the Openreach OSA access product. For information on the customer presentation interface at the BT Service Demarcation Point, please see section 2.3. 2.5.4.4 EAD At the Customer s premise Openreach will install an ADVA XG210 EAD NTE in a customer supplied cabinet. The XG210 chassis will house a transponder card capable of supporting a 1x10GE transport interface. Details and descriptions of the Openreach access products, including chassis size, power and space requirement can be found on the Openreach website www.openreach.co.uk At the BT Core Node, Openreach will install an ADVA XG210 EAD NTE in the BT provided cabinet. The card in the Openreach XG210 NTEs will generate a wavelength between the customer s site and the BT Core Node, which will carry the customer s services. At the BT Core node the Wholesale Optical service coming from the Customer s site will be extended by the Ciena 6500 Optical PoP which will generate a new wavelength across the 21CN optical core network. The wavelength frequencies can be different over the EAD access product and across the 21CN optical core network. Page 19 of 53

Figure 19 shows the connectivity between an end customer s premises and the BT Core Node when an Openreach EAD access product is used. Figure 19: Customer site to BT Core Node connectivity using the Openreach EAD access product. For information on the customer presentation interface at the BT Service Demarcation Point, please see section 2.3. 2.5.4.5 EBD The EBD backhaul product is used to provide connectivity between customer equipment installed in a non BT Core Node, and its adjacent BT Core Node. At the non BT Core Node, Openreach will activate a 1x10GE transponder card. An internal Cablelink will be required to connect the customer s equipment to the EBD transponder card. Details and descriptions of the Openreach access products, including chassis size, power and space requirement can be found on the Openreach website www.openreach.co.uk At the BT Core Node, Openreach will activate a 1x10GE transponder card. The EBD transponder card will generate a wavelength between the non BT Core Node and the BT Core Node, this will carry the customer s services. At the BT Core node the Wholesale Optical service coming from the Customer s site will be extended by the Ciena 6500 Optical PoP which will generate a new wavelength across the 21CN optical core network. The wavelength frequencies can be different over the EBD access product and across the 21CN optical core network. Page 20 of 53

Figure 20 shows the connectivity between an end customer s premises and the BT Core Node when an Openreach EBD backhaul product is used. Figure 20: Customer site to BT Core Node connectivity using the Openreach EBD Backhaul product. For information on the customer presentation interface at the BT Service Demarcation Point, please see section 2.3. 2.5.4.6 External cablelink hand-off The External Cablelink access product is used where the customer has their own fibre installed to the cable chamber associated with the 21CN Core Node. A list of BT Core Nodes where Ciena 6500 Optical PoPs are deployed can be found in Annex A. BT will install either separate client interface and wavelength transponder cards, or a combined client interface/wavelength transponder card installed into existing Ciena 6500 Optical PoPs in 21CN Core Nodes. The card(s) used will be determined by the customer s requirements. The Openreach External Cablelink will be installed between the Ciena 6500 Optical PoP (located in the 21CN Core Area of the BT Core Node) and the customer customer s fibre in the cable chamber, where Openreach engineers will splice the External Cablelink fibre to the customer s fibre. This solution will not accept an Alien wavelength from the customer, and is not available at an on-net data centre. Figure 21 shows the connectivity between the Ciena 6500 Optical PoP and the customer fibre in the BT Core Node cable chamber. Page 21 of 53

Figure 21: Customer site to BT Core Node connectivity using the External Cablelink access product. For information on the customer presentation interface at the BT Service Demarcation Point, please see section 2.3. 2.5.5 Customer site to BT core node service A Wholesale Optical service between a Customer Site and a BT Core Node is comprised of Access connectivity from customer premise to Ciena 6500 Optical PoP in the BT Core Node Connectivity between the BT Core Nodes Where a customer s equipment is located in a third party data centre that is not a designated on-net site for Wholesale optical, this will be classed a customer premise, and it will be the customer s responsibility to provide a cabinet to house the NTE. Table 8 below shows the different access connectivity options and NTE provider for connectivity from the customer s site to the nearest Ciena 6500 Optical PoP for a Customer Site to BT Core Node service. Access Product Customer site A end OSEA6500 Alien (OR NTE) Customer site A end OSEA6500 Bookended (OR NTE) Customer site A end OSA (OR NTE) Customer site A end EAD (OR NTE) Customer site A end EBD (OR NTE) Customer site A end Cablelink Nearest BT Core Node No Yes Yes Yes Yes Yes Table 8: Access products supported on a Customer Site to BT Core Node service. A Customer Sites must only be parented to a BT Core Node; they can t be parented to an on-net Data Centre Node. Page 22 of 53

2.5.5.1 OSEA 6500 Bookended hand-off At the Customer s site Openreach will install a Ciena 6500 NTE in the customer provided cabinet. The size of chassis will be determined by the customer requirements. The Ciena 6500 chassis will house either separate client interface and wavelength transponder cards, or a combined client interface/wavelength transponder card capable of supporting 10Gb, 40Gb and 100Gb Ethernet, Fibre Channel and OTU transport interfaces. Details and descriptions of the Openreach access products, including chassis size, power and space requirement can be found on the Openreach website www.openreach.co.uk At the BT Core Node, Openreach will install a Ciena 6500 NTE in the BT provided cabinet. The cards in the Openreach Ciena 6500 NTEs will generate a wavelength between the customer s site and the BT Core Node (A End), which will carry the customer s services. At the BT Core node (A End) the Ciena 6500 Optical PoP will generate a new wavelength to carry the Wholesale Optical service across the 21CN optical core network to the BT Core Node Node (B end). The wavelength frequencies can be different over the OSEA 6500 Bookended access product and across the 21CN optical core network. Figure 22 shows the Customer Site to BT Core Node connectivity using the OSEA6500 Bookended access product. Figure 22: Customer site to BT Core Node connectivity using the OSEA6500 access product. For information on the customer presentation interface at the BT Service Demarcation Point, please see section 2.3. 2.5.5.2 OSA Bookended hand-off At the Customer s premise Openreach will install an ADVA FSP3000 OSA NTE including appropriate amplification as required in a customer supplied cabinet. The ADVA FSP3000 chassis will house transponder cards capable of supporting 10Gb Ethernet, Fibre Channel and OTU transport interfaces. Details and descriptions of the Openreach access products, including chassis size, power and space requirement can be found on the Openreach website www.openreach.co.uk Page 23 of 53

At the BT Core Node, Openreach will install an ADVA FSP3000 OSA NTE in the BT provided cabinet. The cards in the Openreach FSP3000 NTEs will generate a wavelength between the customer s site and the BT Core Node (A End), which will carry the customer s services. At the BT Core node (A End) the Ciena 6500 Optical PoP will generate a new wavelength to carry the Wholesale Optical service across the 21CN optical core network to the BT Core Node Node (B end). The wavelength frequencies can be different over the OSA access product and across the 21CN optical core network. Figure 23 shows the Customer Site to BT Core Node connectivity using the OSA access product. Figure 23: Customer site to BT Core Node connectivity using the OSA access product. For information on the customer presentation interface at the BT Service Demarcation Point, please see section 2.3. 2.5.5.3 EAD At the Customer s premise Openreach will install an ADVA XG210 EAD NTE in a customer supplied cabinet. The XG210 chassis will house a transponder card capable of supporting a 1x10GE transport interface. Details and descriptions of the Openreach access products, including chassis size, power and space requirement can be found on the Openreach website www.openreach.co.uk At the BT Core Node, Openreach will install an ADVA XG210 EAD NTE in the BT provided cabinet. The cards in the Openreach XG210 NTEs will generate a wavelength between the customer s site and the BT Core Node, which will carry the customer s services. At the BT Core node the Wholesale Optical service coming from the Customer s site will be extended by the Ciena 6500 Optical PoP which will generate a new wavelength across the 21CN optical core network. The wavelength frequencies can be different over the EAD access product and across the 21CN optical core network. Page 24 of 53

Figure 24 shows the connectivity between an end customer s premises and the BT Core Node when an Openreach EAD access product is used. Figure 24: Customer site to BT Core Node connectivity using the Openreach EAD access product. For information on the customer presentation interface at the BT Service Demarcation Point, please see section 2.3. 2.5.5.4 EBD The EBD backhaul product is used to provide connectivity between customer equipment installed in a non BT Core Node, and its adjacent BT Core Node. At the non BT Core Node, Openreach will activate a 1x10GE transponder card. An internal Cablelink will be required to connect the customer s equipment to the EBD transponder card. Details and descriptions of the Openreach access products, including chassis size, power and space requirement can be found on the Openreach website www.openreach.co.uk At the BT Core Node, Openreach will activate a 1x10GE transponder card. The EBD transponder card will generate a wavelength between the non BT Core Node and the BT Core Node, this will carry the customer s services. At the BT Core node the Wholesale Optical service coming from the Customer s site will be extended by the Ciena 6500 Optical PoP which will generate a new wavelength across the 21CN optical core network. The wavelength frequencies can be different over the EBD access product and across the 21CN optical core network. Figure 25 shows the connectivity between an end customer s premises and the BT Core Node when an Openreach EBD backhaul product is used. Page 25 of 53

Figure 25: Customer site to BT Core Node connectivity using the Openreach EBD Backhaul product. For information on the customer presentation interface at the BT Service Demarcation Point, please see section 2.3. 2.5.5.5 External cablelink hand-off Between the Customer Site and BT Core Node, the customer s own fibre will provide connectivity. No NTEs are provided by either BTW or Openreach. The External Cablelink will carry a grey wavelength from the fibre splice in the Core Node external cable chamber to the customer facing port on either a separate client interface and wavelength transponder cards, or a combined client interface/wavelength transponder card installed into existing Ciena 6500 Optical PoP in BT Core Node (A End). The card(s) used will be determined by the customer s requirements.. At the BT Core node (A End) the Ciena 6500 Optical PoP will generate a wavelength to carry the Wholesale Optical service across the 21CN optical core network to the On-net Data Centre Node Node (B end). This solution will not accept an Alien wavelength from the customer, and is not available at an on-net data centre. Figure 26 shows the Customer Site to BT Core Node connectivity using the External Cablelink access product. Figure 26 shows product Figure 26: Customer site to BT Core Node connectivity using the External cablelink access product. Page 26 of 53

2.5.6 Customer site to On-net data centre node service A Wholesale Optical service between a Customer Site and an On-net Data Centre Node is comprised of Access connectivity from customer premise to Ciena 6500 Optical PoP in the BT Core Node Connectivity between the BT Core Node and On-net Data Centre Node Where a customer s equipment is located in a third party data centre that is not a designated on-net site for Wholesale optical, this will be classed a customer premise, and it will be the customer s responsibility to provide a cabinet to house the NTE. Table 9 below shows the different access connectivity options and NTE provider for connectivity from the customer s site to the nearest Ciena 6500 Optical PoP for a Customer Site to On-net Data Centre Node service. Access Product On net Data Centre Node Customer site A end OSEA6500 Alien (OR NTE) No Customer site A end OSEA6500 Bookended (OR NTE) Yes Customer site A end OSA (OR NTE) Yes Customer site A end EAD (OR NTE) Yes Customer site A end EBD (OR NTE) Yes Customer site A end Cablelink Yes Table 9: Access products supported on a Customer Site to On-net Data Centre Node service. A Customer Sites must only be parented to a BT Core Node; they can t be parented to an on-net Data Centre Node. 2.5.6.1 OSEA 6500 - Bookended hand-off At the Customer s site Openreach will install a Ciena 6500 NTE in the customer provided cabinet. The size of chassis will be determined by the customer requirements. The Ciena 6500 chassis will house either separate client interface and wavelength transponder cards, or a combined client interface/wavelength transponder card capable of supporting 10Gb, 40Gb and 100Gb Ethernet, Fibre Channel and OTU transport interfaces. Details and descriptions of the Openreach access products, including chassis size, power and space requirement can be found on the Openreach website www.openreach.co.uk Page 27 of 53

At the BT Core Node, Openreach will install a Ciena 6500 NTE in the BT provided cabinet. The cards in the Openreach Ciena 6500 NTEs will generate a wavelength between the customer s site and the BT Core Node (A End), which will carry the customer s services. At the BT Core node (A End) the Ciena 6500 Optical PoP will generate a new wavelength to carry the Wholesale Optical service across the 21CN optical core network to the On-net Data Centre Node. The wavelength frequencies can be different over the OSEA 6500 Bookended access product and across the 21CN optical core network. Figure 27 shows the Customer Site to On-net Data Centre Node connectivity using the OSEA6500 Bookended access product. Figure 27: Customer site to On-net Data Centre Node Node connectivity using the OSEA6500 access product. The Data Centre cross connect fibre is outside the scope of the Wholesale Optical services and needs to be organised with the Data Centre owner by the customer For information on the customer presentation interface at the BT Service Demarcation Point, please see section 2.3. 2.5.6.2 OSA - Bookended hand-off At the Customer s premise Openreach will install an ADVA FSP3000 OSA NTE including appropriate amplification as required in a customer supplied cabinet. The ADVA FSP3000 chassis will house transponder cards capable of supporting 10Gb Ethernet, Fibre Channel and OTU transport interfaces. Details and descriptions of the Openreach access products, including chassis size, power and space requirement can be found on the Openreach website www.openreach.co.uk At the BT Core Node, Openreach will install an ADVA FSP3000 OSA NTE in the BT provided cabinet. The cards in the Openreach FSP3000 NTEs will generate a wavelength between the customer s site and the BT Core Node (A End), which will carry the customer s services. Page 28 of 53

At the BT Core node (A End) the Ciena 6500 Optical PoP will generate a new wavelength to carry the Wholesale Optical service across the 21CN optical core network to the On-net Data Centre Node. The wavelength frequencies can be different over the OSA access product and across the 21CN optical core network. Figure 28 shows the Customer Site to On-net Data Centre Node connectivity using the OSA access product Figure 28: Customer site to On-net Data Centre Node connectivity using the OSA access product. The Data Centre cross connect fibre is outside the scope of the Wholesale Optical services and needs to be organised with the Data Centre owner by the customer For information on the customer presentation interface at the BT Service Demarcation Point, please see section 2.3. 2.5.6.3 EAD At the Customer s premise Openreach will install an ADVA XG210 EAD NTE in a customer supplied cabinet. The XG210 chassis will house a transponder card capable of supporting a 1x10GE transport interface. Details and descriptions of the Openreach access products, including chassis size, power and space requirement can be found on the Openreach website www.openreach.co.uk At the BT Core Node, Openreach will install an ADVA XG210 EAD NTE in the BT provided cabinet. The card in the Openreach XG210 NTEs will generate a wavelength between the customer s site and the BT Core Node, which will carry the customer s services. At the BT Core node the Wholesale Optical service coming from the Customer s site will be extended by the Ciena 6500 Optical PoP which will generate a new wavelength across the 21CN optical core network. The wavelength frequencies can be different over the EAD access product and across the 21CN optical core network. Page 29 of 53

Figure 29 shows the connectivity between an end customer s premises and the BT Core Node when an Openreach EAD access product is used. Figure 29: Customer site to On-net Data Centre Node connectivity using the Openreach EAD access product. For information on the customer presentation interface at the BT Service Demarcation Point, please see section 2.3. 2.5.6.4 EBD The EBD backhaul product is used to provide connectivity between customer equipment installed in a non BT Core Node, and its adjacent BT Core Node. At the non BT Core Node, Openreach will activate a 1x10GE transponder card. An internal Cablelink will be required to connect the customer s equipment to the EBD transponder card. Details and descriptions of the Openreach access products, including chassis size, power and space requirement can be found on the Openreach website www.openreach.co.uk At the BT Core Node, Openreach will activate a 1x10GE transponder card. The EBD transponder card will generate a wavelength between the non BT Core Node and the BT Core Node, this will carry the customer s services. At the BT Core node the Wholesale Optical service coming from the Customer s site will be extended by the Ciena 6500 Optical PoP which will generate a new wavelength across the 21CN optical core network. The wavelength frequencies can be different over the EBD access product and across the 21CN optical core network. Figure 30 shows the connectivity between an end customer s premises and the BT Core Node when an Openreach EBD backhaul product is used. Page 30 of 53

Figure 30: Customer site to On-net Data Centre Node connectivity using the Openreach EBD Backhaul product. For information on the customer presentation interface at the BT Service Demarcation Point, please see section 2.3. 2.5.6.5 External cablelink hand-off Between the Customer Site and BT Core Node, the customer s own fibre will provide connectivity. No NTEs are provided by either BTW or Openreach. The External Cablelink will carry a grey wavelength from the fibre splice in the Core Node external cable chamber to the customer facing port on either a separate client interface and wavelength transponder cards, or a combined client interface/wavelength transponder card installed into existing Ciena 6500 Optical PoP in BT Core Node (A End). The card(s) used will be determined by the customer s requirements. At the BT Core node (A End) the Ciena 6500 Optical PoP will generate a wavelength to carry the Wholesale Optical service across the 21CN optical core network to the On-net Data Centre Node. This solution will not accept an Alien wavelength from the customer, and is not available at an on-net data centre. Figure 31 shows the Customer Site to On-net Data Centre Node connectivity using the External Cablelink access product. Page 31 of 53

Figure 31: Customer site to On-net Data Centre Node connectivity using the External Cablelink access product. The Data Centre cross connect fibre is outside the scope of the Wholesale Optical services and needs to be organised with the Data Centre owner by the customer. For information on the customer presentation interface at the BT Service Demarcation Point, please see section 2.3. 2.6 Network terminating equipment When providing connectivity to the end customer s equipment using an Openreach access product (EAD, OSA, OSEA6500), the NTE used will be determined by the customer s requirements. Table 10 below shows the NTE options for the different customer facing interface types. Customer Interface ADVA XG210 (EAD) ADVA FSP3000 (OSA) Ciena 6500 (OSEA6500) 1Gb FC No Yes Yes 2Gb FC No Yes Yes 4Gb FC No Yes Yes 8Gb FC No Yes Yes 10Gb FC No Yes Yes 10GE No Yes * Yes 40GE No No Yes 100GE No No Yes OTU2 No No Yes OTU2e No No Yes OTU4 No No Yes Table 10: Customer interfaces and associated NTE Details and descriptions of the Openreach access products, including chassis size, power and space requirement can be found on the Openreach website www.openreach.co.uk. 2.7 Resilience options The Wholesale Optical solution supports three resilience options Standard Service (end to end) Resilience Option 1 (end to end) Resilience Option 2 (end to end) Page 32 of 53

2.7.1 Standard service A Standard service is comprised of A single access circuit between the Ciena 6500 Optical PoP and the NTE associated with the customer s equipment at the A end of the service. A single wavelength across the BT optical core network between the Ciena 6500 Optical PoPs. A single access circuit between the Ciena 6500 Optical PoP and the NTE associated with the customer s equipment at the B end of the service. Figure 32: Wholesale Optical Standard service end to end The access products that can be used with a Standard service are:- Openreach OSA access product Openreach OSEA6500 access product Openreach EAD access product Openreach EBD backhaul product Openreach internal Cablelink Openreach external Cablelink In the event of a failure with either the access product (OSA, OSEA6500, EAD, etc), or the core network wavelength, the end to end Wholesale Optical service will cease to function, and end to end connectivity will be lost. 2.7.2 Resilience option 1 service A Resilience Option 1 (RO1) service is comprised of Standard Openreach access circuit between the Ciena 6500 Optical PoP and the Openreach NTE associated with the customer s equipment at the A end of the service. Two wavelengths across the BT optical core network between the Ciena 6500 Optical PoPs, with one Optical PoP containing the Optical protection Switch (OPS). Standard Openreach access circuit between the Ciena 6500 Optical PoP and the Openreach NTE associated with the customer s equipment at the B end of the service. Page 33 of 53

Figure 33: Wholesale Optical RO1 service across the core network. The access products that can be used with a RO1 service are:- Openreach OSA access product Openreach OSEA6500 access product Openreach EAD access product Openreach EBD backhaul product Openreach internal Cablelink Openreach external Cablelink With a RO 1 service, only the primary core network path is available to the customer. The secondary core network path will only be used in the event the primary path fails In the event of a failure with the primary core network wavelength, the Optical Protection Switch (OPS) in the Ciena 6500 Optical PoP will detect the loss of light and switch the customer s service to the secondary path. Switching to the alternate access circuit path will take less than 50mS and is transparent to the customer s LAG/LACP. In the event of a failure with the access product (OSA, OSEA6500, EAD, etc, the end to end Wholesale Optical service will cease to function, and end to end connectivity will be lost. 2.7.3 Resilience option 2 service A Resilience Option 2 (RO2) service is comprised of Two Openreach access circuits between the Ciena 6500 Optical PoP and the NTE associated with the customer s equipment at the A end of the service Two NTEs at the A end of the service Two wavelengths across the BT optical core network between the Ciena 6500 Optical PoPs Two Openreach access circuits between the Ciena 6500 Optical PoP and the NTE associated with the customer s equipment at the B end of the service Two NTEs at the B end of the service Page 34 of 53

There are two RO2 service options 1. The Openreach access product can connect to two separate BT Core Nodes (Figure 34). 2. The Openreach access product can connect to two separate Ciena 6500 Optical PoPs in the same BT Core Node (Figure 35). In option 2, the two Ciena 6500 Optical PoPs are installed in separate cabinets and served by separate fibres, power, cooling, etc. but the BT exchange as a building does become a single point of failure. Figure 34: Wholesale Optical Resilience Option 2 service. Figure 35: Wholesale Optical Resilience Option 2 service. The access products that can be used with a Standard end to end service are:- Openreach OSA access product Openreach OSEA6500 access product Openreach EAD access product Openreach EBD backhaul product Openreach internal cablelink Page 35 of 53