Reference Offer: Technical Manual

Transcription

1 Reference Offer: Technical Manual Technical Manual 1. Introduction 1.1 Document control 1.2 Overview of Technical Manual 1.3 Health and Safety at Work Law 1.4 References & definitions 2. Scope of Document 2.1 Purpose 2.2 Provisioning policy 2.3 Transmission standards 2.4 Switching and signalling standards 2.5 Physical interconnection 2.6 Document review and change procedure 2.7 Responsibilities, contacts and information 3. Transmission Characteristics of the Interconnection 3.1 Transmission 3.2 Synchronisation Mbit/s interconnection link characteristics Electrical characteristics Functional characteristics 3.4 Interconnection connection principles 3.5 Network link quality of service General Availability Errored second Severely errored second Quality of service levels 4. Physical Interconnect 4.1 Introduction 4.2 In-span interconnect & customer sited interconnect services Cable specification and installation Jointing chamber (ISI service only) Cable termination Cable acceptance Equipment termination Interconnect link testing 4.3 Cable routing & resiliency 4.4 Circuit termination unit specification 4.5 Process for accreditation of alternative CTU 5. Interconnect Switching Interface 5.1 Introduction 5.2 Current PSTN services Calling line identity service 5.3 C7 national signalling interface specification 5.4 Network numbering Numbering 5.5 Operational principles Introduction Signalling principles 1

2 5.5.3 Exchange of signalling information Circuit related signalling Protocols Signalling procedure Traffic direction Signalling link set Circuit identification code (CIC) designation Unidirectional operation Signal transfer point working Automatic re-routing (ARR) Traffic management Point code (PC) scheme Number flow Message validation Tones and announcements 5.6 Switched interconnect grade of service 5.7 Switch traffic routing 5.8 Operator services Commercial requirement Services available Testing requirements Operator services signalling Provision of operator services circuit allocation Operation of services 5.9 Switching Quality of Service Overview Call Availability Dial setup delay Propagation delay 6. Safety 6.1 General 6.2 First aid 6.3 Accident reporting 6.4 Site safety Optical safety Duct seals Electrostatic protection Control of substances hazardous to health (COSHH) Electrical safety Fire control 1. Introduction 1.1 Document Control Issue status: 2015 v0.2 Originated by: Date of issue: Original issue: October 2002 Latest revision: July 2015 Approved by: Approver title: Sure (Guernsey) Limited 2

3 1.2 Overview of Technical Manual The Technical Manual details the technical principles and standards to be employed for the provision and expansion of the switched Interconnect, SDH, and operator services between the telecommunications Systems of two Parties wishing to Interconnect in Guernsey. The Technical Manual is not a legally binding document but supports the Agreement drawn up between the Parties. Each Party will co-operate and apply its best working practices to meet the aims and standards as recorded in this Technical Manual. Other Sure Reference Offer documents, to which reference should be made, are: a) The Agreement, Schedules and Appendices, being legally binding documents between Sure and the Telco (the Parties); and b) The Operations & Maintenance Manual. This Technical Manual has been written to provide staff of both Parties with guidance on the technical principles required for Interconnection and on standards required for provision of Carrier Systems, Interconnect Links and Services as described in Schedule 3 (Service Descriptions). Specific procedures for inter-operation will be agreed between the Parties, wherever such a procedure is considered necessary and does not currently exist. Wherever either Party makes use of documentation produced and controlled by the PNO-IG (sub group of NICC) it is the responsibility of the Party to ensure that the version of the document agreed between the operators is used. Both Parties should obtain sufficient copies for its own use from the UK regulator OFTEL. It is recognised that the establishment of inter Party procedures is an ongoing process, evolving as the needs of each Party and its respective Subscribers become known, thereby the Parties will discuss and agree any new processes and procedures not currently in place in order to meet respective business requirements. The Technical Manual will not, at its first distribution, necessarily detail every finite standard required to provide the Interconnection. Where such standards are not defined, discussions between the two Parties should be held to seek an agreement. 1.3 Health and Safety at Work Law All equipment will comply with EU or national safety standards whichever is the most stringent. All works and operations should adhere with Health & Safety at Work (General) (Guernsey) Ordinance

4 The health and safety at work laws apply to everybody at work. Protection is also extended to others who may be affected by work activities. All staff must be made aware of their responsibilities and the arrangements made for health and safety at work. Such laws require every person in control of non-domestic premises used by employees, "to take such measures as is reasonable for a person in their position to take, to ensure, so far as is reasonably practicable, that the premises, all means of access thereto or egress there from available for use by all persons using the premises and any plant or substance in the premises or, as the case may be, provided for their use there, is or are safe and without risk to health". This may affect either Party should staff of one Party visit premises of the other. See also Section References & Definitions ITU-T RECOMMENDATION TITLE G.703 "Physical/electrical characteristics of hierarchical digital interfaces" G.711 "Pulse code modulation (PCM) of voice frequencies" G.821 "Error performance of an international digital connection forming part of an integrated services digital network" G.824 "The control of Jitter and wander within digital networks which are based on the Mbit/s hierarchy". G.111 "Loudness ratings (LRs) in an international connection" G.113 "Transmission impairments" G.652 "Characteristics of single-mode optical fibre cables" G.703 "Physical/electrical characteristics of hierarchical digital interfaces" G.704 "Synchronous frame structures used at primary and secondary hierarchical levels" G.706 "Frame alignment and cyclic redundancy check (CRC) procedures relating to basic frame structures defined in Recommendation G.704" G.711 "Pulse code modulation (PCM) of voice frequencies" G.783 "Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks" G.811 "Timing characteristics of Primary Reference Clocks" G.812 "Timing requirements of slave clocks suitable for use as node clocks" G.813 "Timing characteristics of SDH slave clocks" 4

5 ITU-T RECOMMENDATION TITLE G.821 "Error performance of an international digital connection forming part of an integrated services digital network" G.823 "The control of Jitter and wander within digital networks which are based on the 2048 kbit/s hierarchy". G.826 "Error performance parameters and objectives for international, constant bit rate digital paths at or above the primary rate" G.921 "Digital sections based on the 2048 kbit/s hierarchy" G.957 "Optical interfaces for equipment and systems relating to SDH" K.11 "Principles of protection against over voltage and over current" K.42 "Preparation of emission and immunity requirements for telecommunications equipment" K.43 "Immunity requirements for telecommunications equipment" K.37 "Public Telecommunications network equipment EMC requirements Part I: Product family overview, compliance criteria and test levels" O.151 "Error performance measuring equipment operating at the primary rate and above" O.171 "Timing Jitter measuring equipment for digital systems" Q.522 "Digital exchange connections, signalling and ancillary functions" PNO-IG SPEC/004 Interconnect Transaction Capabilities, Issue 1 (PD 6650:1999) PNO-IG SPEC/005 Interconnect Message Part, Issue 2 (PD 6639:2001) PNO-IG SPEC/006 Interconnect User Part, Issue 3 (PD 6645:2000) PNO-IG SPEC/007 ISDN User Part, Issue 2.2 (PD 6623:2000) DEFINITIONS Agreement Address Complete Message Appendix Busy Hour Call The Sure Reference Offer including The Legal Framework, its Schedules and Appendices. The Agreement is available within Sure s Wholesale Portal at international.sure.com A message sent by Service Taker to Service Supplier immediately on a Called Party answering the Service Taker System A reference to an Appendix is a reference to an appendix to a Schedule to the Agreement and any reference to the Agreement includes any such Appendix The 60 minute period during which the maximum total traffic load occurs in a given 24 hour period The set-up, holding and ending of a transmission path through the System of either Party into the System of the other Party for conveyance of Messages. A reference to the conveyance of Calls by a Party means the establishment by that Party of a transmission path 5

6 through that Party's System and the conveyance by that Party in accordance with the Agreement of a Message (if any) over such transmission path Called Party Calling Line Identification (CLI) Calling Party Carrier System Sure Sure System Clause CSI Carrier System CTU Customer Sited Interconnect (CSI) Service Data Management Amendment (DMA) The Subscriber connection to which a Calling Party initiates a Call The information identifying the Subscriber connection from which a Call is generated; also known as ANI The initiator of a Call A point to point transmission facility operating at 155 Mbit/s whose sole purpose is to provide E1, 2.048Mbit/s, Interconnect Links between a Service Supplier CTU and a Service Taker CTU. It incorporates the multiplexing and de-multiplexing of E1 bearer services Sure (Guernsey) Limited The System owned, operated or under the control of Sure A reference to a Clause is a reference to a clause of the Agreement A CSI Carrier System will comprise one Service Supplier CTU, one CTU in the Service Takers premises and a single optical fibre cable run routed from the Service Taker ISL to the Service Supplier ISL Circuit Termination Unit - A Network Termination Point necessary for the purpose of Services described in Schedules 3.22 and 3.23 The Service comprising a CSI Carrier System, one or more E1 (2.048 Mbit/s) Interconnect Links and zero, one or more 64 kbit/s Signalling Links, subject to there being a minimum of two such links in total in place between the Service Supplier's System and the Service Taker's System Such data reconfiguration of either or both Parties' System as is necessary for the access, routing and charging of Calls on and between the Parties' Systems Data Management Amendment (DMA) Service The Service consisting of a DMA Emergency Services Call Service The Service that consists of the conveyance of Emergency Service Calls In-Span Interconnect (ISI) Service Interconnect Access Area The Service comprising an ISI Carrier System, one or more E1 (2.048 Mbit/s) Interconnect Links and zero, one or more 64 kbit/s Signalling Links, subject to there being a minimum of two such links in total in place between the Service Supplier's System and the Service Taker's System The island of Guernsey Interconnection / Interconnect Interconnect Link The physical and logical linking of Telecommunications Networks used by the same or a different organisation to allow the user of one organisation to communicate with the users of the same or another organisation or to access services provided another organisation; and services may be provided by the parties involved or other parties who have access to the network Bi-directional E1 transmission facilities within a Carrier System 6

7 Interconnect Switch Location (ISL) The geographic location of either Parties Switch used for the purpose of Interconnection Interconnect Traffic All Calls passed over the Interconnect Links for which there is an entry in Schedule 6 (Schedule of Services Taken) Interconnect Traffic Forecast ISI Carrier System Joint Box Liaison Manager Interconnect Traffic Forecast shall be provided on a yearly basis and shall cover a period of 24 months and shall provide forecasts for each of the Quarters in the first year and the total for the second year and shall, unless otherwise agreed by the Parties, contain the total traffic minutes and erlangs per Service (specified in Schedule 3) per Quarter/year, the Busy Hour definition per Service and number of traffic erlangs per Service per Quarter/year during the Busy Hour and the current traffic profile per Service of the day containing the Busy Hour An ISI Carrier System will comprise one Service Supplier CTU, one CTU in the Service Takers premises and a single optical fibre cable run routed from the Service Supplier ISL and a single optical fibre cable run routed from the Service Taker ISL, connected together at a Joint Box to form one single optical fibre cable run A box located between the Service Supplier and Service Taker's respective Interconnect Switch Locations provided by the Service Supplier of the In-Span Interconnection Service. The Joint Box serves as the Point of Connection The representative with the role set out in the Operations & Maintenance Manual Messages Any: a) speech, music or other sounds; b) electronic mail, data or signals; c) writing or visual images or video or any combination of them; d) signals servicing for the activation or control of machinery or apparatus; and signals serving the impartation (whether as between persons and persons, things and things or persons and things) or any matter otherwise than in the form of sounds or visual images National Numbering Scheme Network Fault Operations & Maintenance Manual The numbering regime applicable to the UK geographic and non-geographic numbers administered by the Director General in cooperation with OFCOM as part of the UK national numbering scheme Any Fault on the Systems of either Sure or the Telco that is not a Link Fault The name given to the operations and maintenance manual developed by Sure and modified from time to time through agreement between Sure and Telco Order Party Point of Connection Schedule Schedule of Services Taken A request for the provision of Services pursuant to the Agreement and Schedule 4 (Service Level Agreements), in the format set out in the Operations & Maintenance Manual Either the Telco or Sure in the Agreement, according to context A physical point between the Systems of the Parties to the Agreement at which the provision of and responsibility for a Service starts or ends A reference to a Schedule is a reference to a schedule to the Agreement and any reference to the Agreement includes any such Schedule The name given the document in Schedule 6 (Schedule of Services Taken) of the Agreement Service Service Descriptions Services described in Schedule 3 and Services which are listed in Schedule 5 (Interconnect and Access Price List) of the Agreement. The name given the document in Schedule 3 of the Agreement 7

8 Service Supplier Service Taker Signalling Links Subscriber Switch System Technical Manual Telco Telco System Third Party Telecom Provider The Party who provides a Service The Party who requests a Service A 64 kbit/s transmission path provided exclusively for the exchange of signalling Messages between service switching points of the Service Taker and Service Supplier A legal or natural person who has a contract with a licensee to receive licensed Telecommunications Services and does not re-supply those or other Telecommunications Services to third parties A facility which performs the function or is capable of performing the function of switching and routing Messages between two or more points Telecommunications Facilities including but not limited to switches, routers and Interconnect Links The name given to the technical manual developed by Sure and modified from time to time through agreement between Sure and Telco The Party entering into the Agreement with Sure The System owned, operated or under the control of the Telco A provider of Telecommunication Services licensed to provide Telecommunications Services in the Bailiwick, or elsewhere, other than the Parties to the Agreement 2 Scope of Document 2.1 PROVISIONING POLICY This Technical Manual will indicate all the known technical principles and standards involved in the provisioning and operation of, or the expansion of, an Interconnection between the Parties. This will include switched Interconnect and operator services. This includes the following main activities/services: a) Transmission standard; b) Switching and signalling standard; c) Network architecture standard; d) Establishing Interconnect; e) SDH standard; f) In-span Interconnect (ISI) & Customer Sited Interconnect (CSI); g) Operator Services h) Operations The operational aspects of Interconnect are recorded in the Operation & Maintenance Manual and appropriate Schedules. This Technical Manual will refer to the other interconnected party as Telco and Sure (Guernsey) Limited as Sure. 8

9 2.2 Provisioning Policy Sure and Telco provide switched Interconnect in a spirit of total co-operation. 2.3 Transmission Standards Transmission standards for the provision of the Interconnect are based upon the industry standard as defined in NPDS7/94/4 developed by the network performance group of the PNO-IG (part of NICC) and are included in Section 3 of this Technical Manual. 2.4 Switching and Signalling Standards Switching and signalling standards operated across the switched Interconnect C7 signalling interface are included in Section 5 of this Technical Manual. 2.5 Physical Interconnect Sure will provide physical Interconnect either as an In-Span Interconnect Service whereby the Point of Connection (PoC) will be situated in a Joint Box in an external jointing chamber on the fibre optic cable route between the two Parties, or, a Customer Sited Interconnect (CSI) where the PoC is at the Service Takers Interconnect Switch Location (ISL) These Services are further described in Schedule 3 (Service Descriptions). Details of the physical Interconnect arrangements are included in Section 4 of this Technical Manual. 2.6 Document Review and Change Procedure This Technical Manual will be reviewed and if necessary updated, in accordance with Sure internal documentation processes for production, change, withdrawal and review of documentation. 2.7 Responsibilities, Contacts and Information Each Party is required to appoint a Liaison Manager for information and enquiry relating to the development and provision of switched Interconnect and operator services. These and other contact points are detailed in the Operations & Maintenance Manual. It is the responsibility of both Parties to the Agreement to ensure that the Technical Manual accurately reflects the technical status of the Interconnection between the two Parties and that the principles indicated are complied with. In addition both Parties shall ensure compliance with the technical requirements of the Agreement as indicated in the appropriate Schedules of that Agreement. 9

10 It is the responsibility of both Parties to adhere to the principles laid down in this Technical Manual and to immediately advise their respective Liaison Manager should any errors, omissions or discrepancies arise or should procedural changes need to be considered. It is the responsibility of all registered Technical Manual holders within each Party to: a) notify the other Party of any changes in name, duty reference, location or address of the holder. b) remove and destroy any elements of the Technical Manual which have been superseded by authorized and circulated re-issues. 3 Transmission Characteristics of the Interconnection 3.1 Transmission This section sets out the principles to be followed by the Parties to achieve the necessary transmission performance for communications that are routed between each Party's Systems. All standards to be attained are as described in the relevant ITU-T Recommendations and equivalent ETSI Standards. All Interconnect requirements shall be based upon interfaces compliant with the appropriate ITU-T Recommendations of the G7XX and G9XX series and equivalent ETSI standards in the ETS (EN) 3xx series. Both Parties will use their reasonable endeavours to comply with ITU-T Recommendations, in particular, the G series, P series and Q5xx series of Recommendations that cover transmission quality and the effect of mixed analogue and digital networks. The transmission quality and performance standards quoted in this document are based on the agreed industry documents NPDS7/94/4 developed by the network performance group of the PNO- IG (part of NICC). Telco should obtain the latest issue of NPDS7/94/4 from the UK regulator OFTEL. 3.2 Synchronisation It is preferable that the Sure System and the Telco System are synchronous (or plesiochronous in compliance with ITU -T G.811) in order to minimise the occurrence of traffic slip between the two Parties at all times. Wherever available Sure shall offer timing at the Sure distribution node to which Telco is interconnected. Although, under normal operating conditions timing within the Sure System will be directly traceable to a primary reference clock, in compliance with ITU-T Rec. G.811, under abnormal operating conditions it may not. In this case the hierarchical level of the distribution node clock, as defined by ITU-T Rec. G.812, will determine the slip-rate, as defined by ITU- T Rec. G.822, and will depend on the architectural location of the distribution node. 10

11 The Telco may synchronise on the Sure System or use their own synchronisation conforming to the synchronisation standards addressed in ITU-T G.703. If the Telco chooses to synchronise on the Sure System, it may do so by using up to two 2048kHz synchronisation outputs from the STM-1 Carrier System. The nominated synchronisation channels will be agreed as part of the Order process as detailed in the Operations & Maintenance Manual. The maximum wander shall conform to ITU-T Recommendation G.811 and G.812. The synchronisation provided by Sure meets the requirements of ITU-T G.703 and is traceable to Stratum 1 source (minimum accuracy of ±1x10-11). The Telco should note that any SDH pointer adjustments would cause significant jitter. This can be significant for a 2Mbit/s signal, used as a timing source, when transported across an SDH network at STM-N level and reconstituted as a 2Mbit/s signal for hand-off at the SDH network boundary. Sure does not offer timing as a standard service or product however it may be possible to take a 2048kHz synchronisation feed subject to: a) the Parties reaching an agreement; b) the Telco shall pay Sure for any equipment procured specifically to provide timing, or hired to prove the quality of timing and manpower costs incurred in the provisioning and testing of the supply; c) Telco shall supply timing equipment for use within its own network. d) Sure commercial rates will be applied for any part of the service which is supplied using standard Sure products Mbit/s Interconnect Link Characteristics Electrical Characteristics The output jitter shall not exceed 0.75 UI under worst case operating conditions when measured in the frequency range 20 Hz to 100 khz, as defined in ITU-T Recommendation G.921 table 3. The tolerance of both the Sure and the Telco input ports to jitter should be as defined in ITU-T Recommendation G.823. A jitter measuring set conforming to the requirements of ITU-T Recommendation O.171 (Timing Jitter Measuring Equipment for Digital Systems) shall be used to measure jitter. Sure and the Telco shall co-operate in the application of testing methods as described in ITU-T Recommendation G

12 The wander specification is set out in ITU-T Recommendation G.823. The maximum values of wander at input ports must conform to section of ITU-T Recommendation G Functional Characteristics Each Mbit/s Interconnect Link shall be transparent and independent of any traffic stream passed across it. The functional characteristics of the interface for the Mbit/s Interconnect Link must conform to ITU-T Recommendations G.704 and G.706 and the additional requirements specified below. Signalling messages shall, by convention, be conveyed in timeslot #16 of nominated Mbit/s Interconnect Links. Where timeslot #16 is not used for the conveyance of signalling information, it shall not be used for any other purpose until such time as Sure notify Telco that timeslot #16 may be used for traffic. Upon mutual agreement between Telco and Sure, time slots other than time slot #16 may be used for the conveyance of signalling information. Time slot #0 shall be used in accordance with the requirements contained in section 2.3 of ITU-T Recommendation G.704. This includes CRC and non-crc inter-working. Bits 4 to 8 that do not contain the frame alignment signal shall be set to '1' Mbit/s interfaces shall conform to ITU-T Recommendations G.803 and G.821 for generation of AIS and RAI alarms and with ITU-T Recommendation G.823 for slipping conditions. At the digital interface the analogue information shall be encoded using the 8 bit, A-law characteristic in accordance with ITU-T Recommendation G.711 such that a 64 kbit/s time slot at the Switch connection can be decoded using an 8 bit, A-law decoder. The bit pattern of a free channel shall be in conformity with ITU-T Recommendation Q.522, section Interconnect Connection Principles The ISI and CSI Services are based upon the principle of one Telco (Service Taker) ISL to one Sure (Service Supplier) ISL. As described in more detail in Schedule 3 (Service Descriptions), the ISI or CSI Service will comprise an ISI or CSI Carrier System, one or more E1 Interconnect Links and zero, one or more 64 kbit/s Signalling Links. The ISI Carrier System will comprise one Service Supplier CTU, one CTU in the Service Takers premises. Each Party will also supply a single optical fibre cable routed from the Service Supplier ISL and a single optical fibre cable run routed from the Service Taker ISL. The two cables will be spliced together at a Joint Box to form one single optical fibre cable run. 12

13 The CSI Carrier System will comprise one Service Supplier CTU, one CTU in the Service Takers premises and a single optical fibre cable routed from the Service Taker ISL to the Service Supplier ISL. The CSI Service will be available at the Service Takers ISL (the Point of Connection). Carrier Systems based on Synchronous Digital Hierarchy (SDH) Mbit/s (STM-1) will be used. All SDH systems should conform to SDH Transport Systems standards: G.707. The basic sub-rate of all the systems is Mbit/s. The Mbit/s Carrier Systems specified are capable of supporting up to sixty three Mbit/s Interconnect 3.5 Network Link Quality of Service General Interconnect Link Availability, Errored Seconds and Severely Errored Seconds are the parameters used to measure the service quality of the Interconnect Link. These quality of service parameters are applicable to all Interconnect Links that are delivered by Sure as well as to all Interconnect Links that are delivered by the Telco. Measurements of these service quality parameters will be specified in units relating to calendar months Availability The definition of Interconnect Link Availability (%) for a Party is 100 * (total time time allocated for planned maintenance - time the link is not available for traffic due to faults)/ (total time - time allocated for planned maintenance) during the specified calendar month Errored Second The definition of Errored Second is a one second interval with one or more bit errors Severely Errored Second The definition of Severely Errored Second is a one-second period that has a bit error ratio greater than or equal to Quality of Service levels The following quality of service level is applicable to the Interconnect Links. 1. Interconnect Link Availability > 99.5% 13

14 2. Percentage of Severely Errored Seconds 0.055% 3. Error Free Seconds > 99.0% 4 Physical Interconnect 4.1 Introduction This section defines the physical aspects of an In-Span Interconnect Service, and a Customer Sited Interconnect Service, when used to connect the Sure System to the Telco System. 4.2 In-Span Interconnect & Customer Sited Interconnect Services An In-Span Interconnect (ISI) is the current industry recommended standard for the physical Interconnection between two Parties. This is a form of Interconnect where the Point Of Connection (PoC) is mutually agreed and implemented at a location on the physical cable route between Sure and Telco. Each Party owns and maintains the transmission equipment at their end of the link. The PoC marks the division of the responsibility for both Parties. This method also avoids the need for setting up complex access agreements on either Party's premises for maintenance and provisioning purposes. The physical connection between the Sure System and the Telco System will be made at the optical level in a Joint Box in a jointing chamber at an agreed location. The Joint Box will be provided by Sure and indicates the demarcation point between the two Systems to form the PoC. Agreement will be reached for the provision of any subsequent PoCs in line with the Operations & Maintenance Manual. The In-Span Interconnect will be established without the need for signal regeneration. 2x2 Mbit/s systems will be provided as a minimum Interconnection between any two interconnected switches. Customer Sited Interconnect is similar to ISI, except that the Point of Connection it sited at the Telco (Service Taker) Interconnect Switch Location (ISL) Cable Specification and Installation Single mode optical fibre cable is specified conforming to ITU-T Recommendation G.652, utilising 1330nm short haul interface conforming to ITU-T Recommendation G.957. Each Party will provide to the other copies of the specification of the proposed cable type to be used for Interconnect. 14

15 The specification of the cable to be used for Interconnect will be agreed between Sure and Telco. Any material differences between the Sure cable specification and that of Telco could result in optical and physical incompatibilities and corresponding loss in quality of the transmission path. For ISI each Party will be responsible for supplying and installing the cable from their system to the Joint Box at the PoC. For CSI Sure (Service Supplier) will be responsible for installing the Service up to the CTU DDF located in the Telco (Service Taker) CTU in the Telco's premises (the Point of Connection) Jointing Chamber (ISI Service Only) The specification of the Joint Box will be provided in the form of engineering drawing blue print. Sure will provide the jointing chamber and Joint Box. A jointing chamber provided by Sure will be constructed in line with normal Sure standards whereby connecting ducts would be laid at 450 mm in the footway and 600 mm in the carriageway. All work performed on Sure duct and cable chambers will be performed to Sure standards and by Sure approved contractors The Telco will be responsible for pulling the optical fibres from the Joint Box to the Telco CTU in the Telco's ISL Cable Termination Unless otherwise agreed termination and splicing of the fibre cable at the PoC will be carried out by Sure. Each party will be responsible for terminating the cable at their end of the link for the ISI Service. Sure will connect the cable at the Telco CTU and connect the latter to the CTU DDF for the CSI Service. The Telco will be responsible for connecting the CTU DDF to the Switch port Cable Acceptance Commissioning and acceptance of the interconnecting cable will be carried out in line with Sure cable acceptance specification, and in accordance with the Operations & Maintenance Manual. However each party should test its own cable, up to the PoC, prior to the splicing of the two cables Equipment Termination The optical fibre cables will be terminated at each end of the link via an Optical Distribution Frame (ODF). The ODF will be connected to suitable multiplex equipment, where necessary and terminated on a Digital Distribution Frame (DDF). The terminal equipment at each end of the link, including any necessary multiplex, DDF, ODF and miscellaneous items will be the responsibility of the respective System owner. All outputs from the multiplex equipment will be in line with the standard of ITU-T Rec. G Interconnect Link Testing 15

16 The transmission link will be jointly tested end to end using the appropriate Sure or PNO-CSI Commissioning test, in accordance with the Operations & Maintenance Manual. In addition Switch to Switch testing will be carried out using the Sure/Telco Commissioning and Acceptance Testing (CAT) Manual. 4.3 Cable Routing & Resiliency No physical route diversity is provided. Carrier System equipment resiliency is provided whereby a working fibre pair and a protecting fibre pair are provided on the same fibre route. Protection switching is facilitated by the CTU of each party in accordance with 1+1 Multiplex Section Protection (MSP) standards specified in ITU-T Recommendation G.783. Cables that enter and traverse cable vaults will be protected by concrete outside building and mechanical armouring within the building. The physical interface between the Telco System and the Sure System will be the STM-1 optical fibre interface. For the avoidance of doubt, the physical interface is not the same as the Point of Connection. 4.4 Circuit Termination Unit Specification Sure has purchased Marconi equipment for use as its Interconnect equipment. Sure would expect that most initial Interconnect requirements will be met by use of the STM-1 Add Drop Mux offering 63x2 Mbit/s capability at an aggregate rate of 155 Mbit/s. Sure approved switch supplier, following inter-working testing is as follows: MANUFACTURER PRODUCT Marconi SMA-1 Series 3 The following space must be made available for each Circuit Termination Unit (CTU) cabinet. DIMENSION DETAILS 1. Width (w) 600 mm 2. Depth (d) 800 mm 3. Height (h) 2200 mm 4. Minimum height between top of cabinet and ceiling. (this is necessary for the installation of cabling to equipment and for heat dissipation); or 300 mm 16

17 DIMENSION DETAILS Distance between floor and raised computer floor (preferred approach) 400 mm Sufficient space must be available for the cabinet doors to be opened. The maximum floor loading will be 5500 N/m 2 The Service Taker will provide a no break DC power via 2 circuit breakers capable of supplying the requirements defined in the manufacturers specification. A safety earth directly back to the main earth bar/electrical sheath, must also be provided. 4.5 Process For Accreditation Of Alternative CTU All CTU equipment must conform to SDH standards and any additional standards specified in this Technical Manual. In advance of ordering, any alternative CTU manufacturer equipment specification shall be sent to the Sure Liaison Manager by the Telco for technical evaluation. Further to this evaluation, some specific inter-operability testing may need to be planned and conducted. For the avoidance of doubt, interoperability testing will not be required where alternative CTU equipment is designed with identical interface specifications to the equipment specified in Interconnect Switching Interface 5.1 Introduction This section details the switching interface principles and requirements for the Telco /Sure switched Interconnect and is intended to identify and amplify the principles of the Agreement. Amendment of these principles will be discussed and agreed by the two Parties to the Agreement from time to time. National interconnect switching facilities will be provided on "System X" switches within the Sure network. Sure with will determine the particular Switch used due consideration for current System architectures, the availability of current and ongoing switching resources and the requirements of Telco as the Service Taker. The Parties to the Agreement will consider and advise on the technical implications and requirements for the introduction of any new services and facilities as directed by the Liaison Manager and in line with the provisions of the Sure/Telco Agreement. Should Telco wish to introduce a new service that is not offered by Sure, Telco shall 17

18 provide a written statement of requirements and the process for acceptance or rejection by Sure will be in accordance with Clause 4 of the Legal Framework. Once the Parties have agreed technical and commercial terms and conditions of the new Interconnection service, forecasting, ordering and provisioning of Interconnection Capacity for the new Interconnection service will be in accordance with Schedule 4 (Service Level Agreements) and the Operations & Maintenance Manual. Once it has been mutually agreed that the requirements have been met the Service will be introduced across the Interconnect. Sure will amend the Agreement, Schedules, Appendices, Operations & Maintenance Manual and this Technical Manual as appropriate. 5.2 Current PSTN Services The Agreement currently offers PSTN Services as per the Schedule 3 (Service Descriptions) and Schedule 5 (Interconnect and Access Price List). In addition the Services taken by the Telco are recorded in Schedule 6 (Schedule of Services Taken). For Sure On-Island and Off-Island Transit Services it is the responsibility of the Telco to ensure that the service satisfactorily works end to end Calling Line Identity Services Calling Line Identity (CLI) is the digits that, in general, identify the number in the National Numbering Scheme, excluding the leading 0, of the Calling Party. The network CLI may be used for network purposes, such as billing, Call routing, administration, Emergency Service Calls (112/999) and malicious Call identification. CLI for display services may be exchanged subject to each Party complying with the latest version of the "Code of Practice for Network Operators in relation to CLI Display Services" and any relevant data protection legislation. When the Network CLI is not available then a Partial CLI may be returned. The information is not returned in CLI format but has different information and includes an associated marker to indicate that it is not a CLI. The Partial CLI must conform, in structure, to the requirements of the C7 signalling interface specification. In addition to the marker, the information included in the Partial CLI identifies the originating network, the type of the originating Switch, the actual originating Switch and where possible, the incoming route. All types of CLI service referenced in this document will be tested in accordance with the appropriate sections of the latest version of the Sure CAT Manual. 18

19 5.3 C7 National Signalling Interface Specification The national signalling interface between Telco and Sure will be based upon the UK C7 signalling protocols as defined by the PNO-ISC (NICC) in documents PNO-ISC/Spec/005 Message Transfer Part and PNO-ISC/Spec/006 Interconnect User Part. The latest issue of these documents may be obtained from the UK regulator, OFTEL. Telco should indicate compliance to the PNO-ISC signalling specifications. 5.4 Network Numbering This section details the numbering principles between the networks Numbering Sure has been allocated both geographic and non-geographic numbers in the National Numbering Scheme. These allocations are either AFN or DE blocks. All Sure terminating numbers beginning with 0 are 11 digits. Prior to the launch of Service details of the valid Sure number ranges and those of any Party interconnected to Sure in the Bailiwick will be forwarded to Telco. (In a format yet to be agreed) The procedure for Data Management Amendments is in the Operations & Maintenance Manual. Prior to the launch of Service, Telco will advise Sure of their valid number ranges. The procedure for Data Management Amendments is in the Operations & Maintenance Manual. Each Party will keep the other advised of number range additions/amendments applicable to their System. The procedure for Data Management Amendments is in the Operations & Maintenance Manual. 5.5 Operational Principles Introduction This section details the signalling interface principles to support the passing of Calls between the Systems of the two Parties. Technical implementation details regarding C7 and associated network planning issues are addressed. It is expected that the Telco would supply a Conformance Statement based on ITU-T Q and to have completed a Sure Proforma prior to any technical discussions regarding the provision of a switching interface. The Proforma is available from Sure and indicates the proposed switch types and point codes and the expected signalling arrangements. C7 Specs. would be exchanged as defined by PNO-ISC (NICC) in documents PNO- ISC/Spec/005 Message Transfer Part and PNO-ISC/Spec/006 Interconnect User Part Signalling Principles 19

20 Signalling applied shall be Signalling System No. 7 which conforms to ETSI standards. Operator dependent implementations of the signalling protocol at the network Interconnection interface will not be supported. In principle Sure will transfer signalling Messages transparently through its System. However, Sure cannot guarantee proper end-to-end inter-working of Services originating or terminating outside the Sure System Exchange of Signalling Information The Telco will forward all signalling information necessary to datafil the routes, to Sure, at the time of ordering any capacity. The necessary order forms, incorporating the signalling information, are available in the appendices contained in the Operations & Maintenance Manual Circuit Related Signalling 3.1Khz audio and speech bearer Services are supported Protocols The following PNO ISC specified protocols shall be supported. SPEC/004 - Interconnect Transaction Capabilities, Issue 1 (PD 6650:1999) SPEC/005 - Interconnect Message Part, Issue 2 (PD 6639:2001) SPEC/006 - Interconnect User Part, Issue 3 (PD 6645:2000) SPEC/007 - ISDN User Part, Issue 2.2 (PD 6623:2000) The signalling mode is fully associated Signalling Procedure All Calls to local significant numbers shall use en-bloc-signalling mode of operation. In case of overlap signalling mode of operation the Address Complete Message shall be sent as soon as all digits necessary to complete the Call are received Traffic Direction Interconnect between Telco and Sure will utilise unidirectional circuits Signalling Link Set In order to maintain high levels of System security any Interconnection between the Parties' Switches must, as a minimum, contain 2 x 64 kbit/s bi-directional transmission links over which will be carried the Signalling Link Set 20

21 thereby forming a combination of two signalling channels operating together. Where possible the two signalling channels should be routed diversely A particular Signalling Link Set (2 x 64 kbit/s) may carry signalling for both directions of traffic across a common Interconnect. A Signalling Link Set is carried on the first and second 64 kbit/s systems and should, wherever possible, be routed diversely. A Signalling Link Set will be provided for up to 40 traffic carrying 2 Mbit/s transmission links. Sure and the Telco will maintain equal loading of the Signalling Links. This formula is applicable when Signalling Links are used for circuit related signalling and the number of links will be subsequently monitored, and adjusted, should this be necessary, according to specific traffic type Circuit Identification Code (CIC) Designation A C7 route can have up to 4096 circuits. Conventionally, in the UK on System X switches, they are split into 16 groups of 256 circuits, each group carrying the same type of traffic (e.g. incoming or outgoing). In order to provide sufficient capacity in each direction, it is necessary to use separate groups for incoming and outgoing traffic. This section provides a method of provisioning the circuits to allow optimum use of the circuits between Telco and Sure Unidirectional Operation The provisioning of uni-directional traffic circuits shall be in multiples of a Network Band (NWB) of 16 contiguous CICs in line with the 16 contiguous time slots or channels in a 2 Mbit/s PCM bearer, starting at Time Slot 0 or 16, although these are not available for traffic Signal Transfer Point Working For the initial Interconnect implementation STP or Quasi-Associated Signalling (QAS) will not be employed Automatic Re-Routing (ARR) Alternative Re-Routing shall not be a feature of initial implementation Traffic Management In order to assist in offering the best possible customer service, appropriate traffic management actions should be discussed between the traffic management staff of each Party. Staff will agree traffic management actions to be taken with the other Party in advance of their application. Service Supplier reserves the right to apply call gapping where the other Party is engaged in acts or omissions which may impair the integrity or security of the Service Suppliers System or services. 21

22 Traffic management actions are taken typically to protect System integrity as per the following situations: a) National Emergencies (As requested by civilian or military defense authorities); b) Network Failures (Whereby further traffic flows across an Interconnect route would place a network in further danger of failure); c) Mass Calling Event (Whereby such uncommon excessive traffic levels would place a network element in danger of failure); d) Multi Subscriber Complaints (Whereby either Party establishes a pattern of Call failures from a large number of Subscribers to destination specific routes); e) Any other situation where either Party considers traffic management actions should be taken in the best interests of its Subscribers. Automatic Alternative Routing (AAR) may be used by mutual agreement of the staff to protect switched traffic wherever alternative routing options exist within a Party's System Point Code (PC) Scheme The structure and management of PCs shall be as described in the latest issue of the industry accepted documentation generated by the PNO-IG i.e. PNO-IG/Spec/001 and PNO-IG/INFO/001. The document will be available through the UK regulator, Ofcom Number Flow For Local Calls and National Calls (Calls to the UK) the Full National Number plus the Trunk Prefix (0) will be passed in the IFAM or IAM and SAM/FAM. For International Calls the International Prefix (00) will be passed in the IFAM or IAM. Full National Number minus Trunk Prefix (0) will be passed in CLI response messages Message Validation It is agreed that Message validation/policing procedures will not be used as a normal procedure on Interconnect routes. However, each Party reserves the right to use such techniques if it believes non-agreed Messages and/or contents thereof are being passed across the Point of Connection. 22

23 The Parties will ensure that the Message validating procedure will not affect Calls using agreed protocols, although it is recognised that some additional delays may be introduced by the Message validation procedures. The Parties will ensure that the Message validation procedure will not be used to cause unnecessary or excessive delays in Call handling Tones and Announcements Any change to or introduction of tones or announcements, which specifically relates to the other Party requires prior agreement with the other Party before its introduction into either Party's System. Temporary tones or announcements may be required for network management purposes. Any such use should be agreed between both Parties' network management staff. Such tones or announcements shall not involve Messages which discriminate between either Party's Systems. 5.6 Switched Interconnect Grade Of Service The Parties will ensure that their Subscribers experience an overall grade of service across the Interconnect Link consistent with the principles laid down in ITU-T Recommendations, in particular Rec. E520. Traffic routes shall be dimensioned to enable operation at a Busy Hour grade of service of better than In addition it is recommended that a 25% overload headroom be provided. 5.7 Switch Traffic Routing The Interconnect Access Area is the Island of Guernsey. The locations of the ISLs at which Services are provided pursuant to the Agreement are specified in Schedule 6 (Schedule of Services Taken). Each party will undertake the routing/translation for all codes that require re-routing/re-translation across its network. 5.8 Operator Services This section outlines the requirements of both Parties in order to offer operator services across the Interconnect Link Commercial Requirement Only Services that are included in Schedule 6 (Schedule of Services Taken) will be launched. Telco is required to supply Interconnect Traffic Forecasts for operator services in line with the procedure set out in the Operations & Maintenance Manual Services Available 23

24 The operator services available are as shown in Schedule 3 (Service Descriptions) and Schedule 5 (Interconnect and Access Price List), and those Services taken by the Telco are recorded in Schedule 6 (Schedule of Services Taken) Testing Requirements Specific operator services testing will be required prior to the conveyance of operator services traffic. Tests will be required to check that Subscribers present the correct information on screen, for the appropriate operator service to enable Sure to handle the Call correctly. Additionally, the on screen data provided may be used by Sure for checking against Call Data Records to ensure that the Services can be correctly billed. It also enables Sure to identify any additional operational processes and training that may be required Operator Services Signalling The ability for Telco to send the full CLI is an imperative condition for Sure to provide operator services and the Emergency Call Service on behalf of Telco. The Telco will be required, through agreed testing, to provide evidence to demonstrate that they can support the provision of full CLI. Telco shall forward information to Sure across the interface within the C7 signalling system that identifies the Calling Party and the required Service. This will be achieved by digit transfer within the IFAM Message (or IAM and any subsequent SAM Messages) dialed digit field. The routing digit details are exchanged as part of the exchange of routing information as laid down in the Operations & Maintenance Manual. Sure will request and Telco will provide the full CLI of the Calling Party by use of the ACI protocol. In addition to full CLI, the Telco must supply the "Manual Hold" facility for the support of the Emergency Services Call Service. Upon answer an "ANS" Message will be returned to Telco in all cases. Sure will produce a CDR at the POI switch and a CDR at the OSS switch, the originating Telco Subscriber's CLI will only be recorded on the OSS CDR Provision of Operator Services Circuit Allocation Should the Telco interconnected Switch be Nokia then agreement between the Parties must be made on allocation of CICs Operation of Services 24