Customer Interface Publication: KCOM (Hull) CIP013
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1 Customer Interface Publication: KCOM (Hull) CIP013 Technical Characteristics of the Kiloline digital leased line interfaces Issue: 1.2 April 2016 The information in this document is provided in accordance with the requirements of the Radio Equipment and Telecommunications Terminal Equipment Regulations 2000 (Statutory Instrument 2000 No. 730) to publish (in accordance with the EC Radio and Telecommunications Terminal Equipment Directive 99/05/EC) technical characteristics of interfaces to the public fixed telephone network. Users of this document should not rely solely on the information in this document, but should carry out their own tests to satisfy themselves that terminal equipment will work with the networks of KCOM Group PLC. This document does not form a part of any contract with KCOM Group PLC customers or suppliers. KCOM Group PLC shall have no liability in contract tort or otherwise for any loss or damage, howsoever arising from use of, or reliance upon, the information in this document by any person. Publication of this Customer Interface Information Document does not give or imply any licence to any intellectual property rights belonging to KCOM Group PLC or others KCOM Group PLC 37 Carr Lane Kingston Upon Hull HU1 3RE
2 Contents 1. Scope 2. General 3. The Network Termination Point 4. Electrical Characteristics of the Interface 5. Safety and EMC information 6. Terminal equipment specifications 7. Glossary 8. References 9. History 2 of 7
3 Note : this document replaces KCOM Group PLC CIP010 on the same subject- see document history. 1. Scope This document specifies the technical characteristics of the interfaces operated by KCOM Group PLC under the Kiloline service delivered to a customer at the Network Terminating Point (NTP). Much of the information contained in this document has been published previously in various documents such as ITU-T, ETSI and BSI standards. Changes to the network that affect the correct working of approved terminal equipment will be published by KCOM Group PLC in various documents made available from the address below. If the changes impact on this document then it will be updated. Enquiries relating to the technical content of this document and the availability of other publications should be directed to: KCOM Group PLC Regulatory Affairs 37 Carr Lane Kingston Upon Hull HU1 3RE Telephone : regulatory@kcom.com 2. General The KCOM Group PLC Kiloline service is delivered to the customer via interfaces complying with ITU-T recommendations X.21[1] and X.21 bis [2]. 3. The Network Termination Point 3.1 ITU-T recommendation X.21 The network termination point shall be a 15-way d connector (as defined in ISO 4903 [3]) mounted on the Network Terminating and Test Apparatus (NTTA)/Network Terminating Equipment (NTE) based on the customer premises. 3.2 ITU-T recommendation X.21bis The network termination point for data rates of 2.4, 4.8, 9.6 and 19.2 kbit/s shall be a 25-way connector (as defined in ISO 2110 [4]) mounted on the Network Terminating and Test Apparatus (NTTA)/Network Terminating Equipment (NTE) based on the customer premises. The network termination point for data rates of 48 kbit/s shall be a 34-way connector (as defined in ISO 2593 [5]) mounted on the Network Terminating and Test Apparatus (NTTA)/Network Terminating Equipment (NTE) based on the customer premises. 3 of 7
4 4. Electrical Characteristics of the Interfaces 4.1 ITU-T recommendation X.21 The interchange circuits used are as follows : ITU-T Circuit Direction of signalling Circuit Description Pin A Pin B designation G To DCE Ground / CommonReturn 8 - T To DCE Transmitted data 2 9 R From DCE Received data 4 11 C To DCE Control 3 10 I From DCE Indication 5 12 S From DCE Signal element timing 6 13 B From DCE Byte timing 7 14 A full description of the circuits can be found in ITU-T recommendation X.24[6]. The electrical characteristics of the interface are compatible with ITU-T recommendation X.27 (V.11)[7] with cable termination in the load. This condition also applies to the DTE. The interface supports data rates of 2.4, 4.8, 9.6, 19.2, 48 and 64 kbit/s. 4.2 ITU-T recommendation X.21bis 4.1 Data rates of 2.4, 4.8, 9.6 and 19.2 kbit/s The interchange circuits used are as described in table 1 of ITU-T recommendation X.21 bis. A full description of the interchange circuit functions can be found in ITU-T recommendation V.24[8 ]. The electrical characteristics of the interchange circuits are described in ITU-T recommendation V.28 [9] 4.2 Data rate of 48 kbit/s The interchange circuits used and their electrical characteristics are as described in ITU-T recommendation V.35 [10]. 4 of 7
5 5. Safety & EMC Information 5.1 Safety The normal working voltages of the ITU-T recommendation X.21 [1] digital leased line interface are defined in ITU-T recommendation X.27 (V.11)[7]. The normal working voltages of the ITU-T recommendation X.21 bis [2] interfaces are defined in ITU-T recommendation V.28 and V.35 as appropriate. The interface presented to the customer is classified as exposed as defined in the CENELEC Report/ETSI Guide ROBT-002/EG [11]. 5.2 EMC The network equipment and network terminating equipment related to the provision of the interface comply with the current EMC regulations. Whilst predominantly installed in commercial and light industrial environments, this does not preclude the interface being installed in other environments e.g. residential or industrial. This should be taken into account by the terminal equipment manufacturer when determining the limits of compliance relevant to their equipment in relation to the protection requirements of the EMC directive. 6. Terminal Equipment Specifications The minimum recommended terminal equipment performance specifications are: ITU-T X.21 service : TBR 1[12] ITU-T X.21 bis service : PD7027 [13] The minimum recommended terminal equipment EMC specifications are listed in the Official Journal of the European Communities for use under the Electromagnetic Compatibility Directive (89/336). The lists are updated regularly and the terminal manufacturer is recommended to comply with the listed standards applicable to their equipment and the target electromagnetic environment. The minimum recommended terminal equipment electrical safety specifications are listed in the Official Journal of the European Communities for use under the Low Voltage Directive (73/23/EEC). The lists are updated regularly and the terminal manufacturer is recommended to comply with the listed standards applicable to their equipment. 5 of 7
![The interface presented to the customer is classified as exposed as defined in the CENELEC Report/ETSI Guide ROBT-002/EG 201 212 [11]. 5.](/docs-images/48/18334413/images/page_5.jpg "2 EMC The network equipment and network terminating equipment related to the provision of the interface comply with the current EMC regulations.")
6 7. Glossary BS BSI DCE DTE EC EMC ETS ETSI ITU-T NTE NTP NTTA BS PD Document TE British Standard British Standards Institute Data Circuit-terminating Equipment Data Terminal Equipment European Community Electromagnetic Compatibility European Telecommunication Standard European Telecommunications Standards Institute International Telecommunications Union Telecommunications Sector Network Termination Equipment Network Terminating Point Network Terminating and Test Apparatus British Standard Published Terminal Equipment TFC IN Traffic In TFC OUT Traffic Out 6 of 7
7 8. References Ref Standard Title Date [1] ITU-T X.21 Interface Between Data Terminal Equipment (DTE) and Data 1992 Circuit Terminating Equipment (DCE) for Synchronous Operation on Public Data Networks [2] ITU-T X.21 bis Use on Public Data Networks of Equipment (DTE) which is designed for interfacing to synchronous V-series modems [3] ISO pole DTE/DCE Interface Connector and Contact Number Assignments 1989 [4] ISO 2110 including Amendment 1 Information technology -- Data communication pole DTE/DCE interface connector and contact number assignments for data signalling rates above bit/s per second [5] ISO 2593 Information technology -- Telecommunications and information exchange between systems pole DTE/DCE interface connector mateability dimensions and contact number assignments (available in English only) [6] ITU-T X.24 [7] ITU-T X.27 [8] ITU-T V.24 [9] ITU-T V.28 [10] ITU-T V (Red Book) [11] R0BT-002/EG V ( ) List of definitions for interchange circuits between data terminal equipment and data circuit-terminating equipment on public data networks Electrical Characteristics for Balanced Double Current Interchange Circuits for general use with Integrated Circuit Equipment in the field of Data Communication List of definitions for interchange circuits between data terminal equipment (DTE)and data circuit terminating equipment (DCE) Electrical characteristics for unbalanced double-current interchange circuits. Data transmission at 48 kilobits per second using kHz group band circuits Electrical Safety ; Classification of interfaces for equipment to be connected to telecommunications networks [12] ETSI TBR 1 Attachment Requirements for terminal equipment to be connected to circuit switched data networks and leased circuits using a CCITT X.21 interface [13] PD 7027: 1995 Essential requirements for Terminal Equipment intended for connection 1995 to digital leased Digital circuits with X.21bis interfaces and rates of 2.4, 1989 / of 7
8 The above documents may be obtained from: British Standards Institution Customer Services, Sales Department 389 Chiswick High Road, London W4 4AL Telephone : Facsimile : History Date Issue Comments Author Precursor document Technical Characteristics of the Kiloline digital leased line interfaces [Issue 1.0 May 2000] KCL CIP010 M.Budd December 2003 Issue 1.0 Kingston Communications Hull PLC publication to replace the above August 2007 Issue 1.1 KCOM Group PLC publication to replace the above and change of contact information April 2016 Issue1.2 KC name change to KCOM and document formatting M. D. Crowther M. D. Crowther Amanda Woodard 8 of 7
![0 May 2000] KCL CIP010 M.Budd December 2003 Issue 1.0 Kingston Communications Hull PLC publication to replace the above August 2007 Issue 1.](/docs-images/48/18334413/images/page_8.jpg "1 KCOM Group PLC publication to replace the above and change of contact information April 2016 Issue1.2 KC name change to KCOM and document formatting M. D. Crowther M.")
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