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| Last updated: Oct 05 | |||
| BT | British Telecommunications plc | ||
| BTWM | BT Wholesale Markets | ||
| CFD | Call Flow Diagram | ||
| CLI | Calling Line Identity | ||
| CMC | Call Management Centre | ||
| CNS | Chargeable Number String | ||
| CPL | Carrier Price List | ||
| CPS | Carrier Pre-Selection | ||
| CP | Communications Provider (Previously OLO) | ||
| CSI | Customer Sited Interconnect | ||
| CSP | Customer Service Plan | ||
| DACC | Directory Assistance Call Completion | ||
| DAS | Directory Assistance System | ||
| DISC | Digital International Switching Centre | ||
| DIU | Directory Information Unit | ||
| DJSU | Digital Junction Switching Unit | ||
| DLE | Digital Local Exchange | ||
| DMA | Data Management Amendment | ||
| DMSU | Digital Main Switching Unit | ||
| DPC | Destination Point Code | ||
| DQ | Directory Enquiries | ||
| EBC | Element Based Charging | ||
| FAC | Fully Allocated Costs | ||
| FF | FreeFone or Free Phone | ||
| GNP | Geographic Number Portability | ||
| FRIACO | Flat Rate Internet Access Customer Orientated | ||
| GPS | Global Positioning System | ||
| GSM | Global Systems Mobile | ||
| IA | Indirect Access | ||
| IBI | In-Building-Interconnect | ||
| IBL | Inter Building Link | ||
| ICSTIS | Independent Committee for the Supervision of Standards of Telephone Information Services | ||
| IDA | Indirect Access | ||
| IDD | International Direct Dial | ||
| IDQ | International Directory Enquiries | ||
| IEC | Interconnect Extension Circuit | ||
| IFA | International Facilities Access | ||
| IN | Intelligent Network | ||
| INCA | Inter Network Call Accounting | ||
| IPLC | International Private Leased Circuit | ||
| ISC | International Switching Centre | ||
| ISC | International Standards Committee | ||
| ISDN | Integrated Services Digitial Network | ||
| ISI | In Span Interconnect | ||
| ISP | Internet Service Provider | ||
| ISS | Interconnected Standard Services | ||
| IVT | Interconnect Validation Testing | ||
| LCFA | Local Call Fee Access | ||
| LECO | Local Exchange Call Origination | ||
| LLU | Local Loop Unbundling | ||
| LORS | Licensed Operator Registration System | ||
| LTE | Line Termination Equipment | ||
| MDF | Main Distribution Frame | ||
| MNPT | Mobile Number Portability Transit | ||
| MSO | Multi Switched Operator | ||
| MUX | Multiplexor | ||
| NCC | Network Charge Control | ||
| NCCN | Network Charge Change Notice | ||
| NCCR | Network Charge Change Regime | ||
| NCCSIA | Network Charge Control Standard Interconnect Agreement | ||
| NCD | Network Charge Differential | ||
| NCOP | Network Code of Practice | ||
| NGNP | Non-Geographic Number Portability | ||
| NGNPT | Non-Geographic Number Portability Transit | ||
| NGS | Next Generation Switch | ||
| NICC | Network Interfaces Co-ordination Committee | ||
| NIF | Network Integration Facility | ||
| NIPP | Network Implementation Publication Principles | ||
| NIS | Number Information Service | ||
| NNG | National Number Group | ||
| NOA | National Operator Assistance | ||
| NOC | Network Operations Centre | ||
| NRC | Net Replacement Cost of assets | ||
| NSM | New Services Manual | ||
| NTS | Number Translation Service | ||
| O&M | Operations & Maintenance | ||
| OCCN | Operator Charge Change Notice | ||
| OCP | Originating Communications Provider | ||
| OFCOM | Office of Communications (The Regulator, previously known as Ofcom) | ||
| OFTEL | Office of Telecommunications (The Regulator prior to December 2004) | ||
| OLO | Other Licensed Operator (Now referred to as Communications Provider) | ||
| ONO | Originating Network Operator | ||
| OS | Operator Services | ||
| OSC | Off Switch Charging | ||
| OSIS | Operator Services Information System | ||
| OTM | Operational Test Manual | ||
| PAC | Payphone Access Charge | ||
| PAL | Payphone Access Levy | ||
| PCN | Personal Communications Network | ||
| PECN | Public Electronic Communications Network | ||
| PNO | Public Network Operator | ||
| PNO-IG | Public Network Operators - Interest Group | ||
| PNS | Personal Numbering Service | ||
| POC | Point of Connection | ||
| POI | Point Of Interconnection | ||
| POLO | Payment to Other Licensed Operator | ||
| POP | Point Of Presence | ||
| ppc | Pence Per Call | ||
| ppm | Pence Per Minute | ||
| PPP | Product Management Policy & Planning | ||
| PRS | Premium Rate Service | ||
| PS&P | Pricing Strategy & Plan | ||
| PSTN | Public Switched Telephony Network | ||
| PTO | Public Telephony Operator | ||
| PVC | Private Circuit | ||
| PUC | Product Utilisation Charges | ||
| RCU | Remote Concentrator Unit | ||
| RFS | Ready For Service | ||
| RFT | Ready For Test | ||
| RMF | Ring Me Free | ||
| ROLO | Receipt from Other Licensed Operator | ||
| RPI | Retail Price Index | ||
| RPIP | Retail Price Implementation Plan | ||
| RPL | Retail Price List | ||
| RSC | Revised Standard Contract | ||
| RSIA | Revised Standard Interconnect Agreement | ||
| RU | Retail Uplift | ||
| SDH | Synchronous Digital Hierarchy | ||
| SIA | Standard Interconnect Agreement | ||
| SIMPLE | System Introducing Methods of Pricing with Linked Explanations | ||
| SLA | Service Level Agreement | ||
| SMC | Service Management Centre | ||
| SMP | Significant Market Power | ||
| SP | Service Provider | ||
| SRM | Service Review Meeting | ||
| T&P | Technical & Provisioning | ||
| TCP | Terminating Communications Provider | ||
| TIBS | Telecommunications Input Billing System | ||
| TNO | Trunk Network Operator | ||
| TO | Terminating Operator | ||
| TWIX | Twinned with Interconnect (Amount retained by the Transit Operator) | ||
| UFS | Universal FreeFone Service | ||
| UIFS | Universal International FreeFone Service | ||
| UMTS | Universal Mobile Telephony Service | ||
| VAS | Value Added Service | ||
| VPN | Virtual Private Network | ||
| VRUF | Volume Related Unit Fee | ||
