Telephony Terms

ACRONYM OR TERM

MEANING

FURTHER INFORMATION

1280

Indirect access pre-fix to route a call over the Openreach network even if CPS is active on the line.

141

The prefix used by an End User, before dialling a telephone number, to ensure their number is

withheld for that call

1470

Prefix used by an End User, before dialling a telephone number, to ensure their number is released for that call.

1471

See Call Return

1471 Extra

When using 1471 Extra the EU can dial the digits "1471" to hear details of up to the last five calls received, together with the time and date (unless withheld or from an exchange where the callers number is not available). After dialling ˜1471" instructions will be given advising how to use the

services.

1571

Key sequence used on a telephone handset to access Call Minder and Wholesale 1571 messaging

services

21CN

The name given to the Openreach 21st century network programme

ACR

Anonymous Call Rejection

Network based service that allows End Users to block calls from people who have withheld their

numbers.

Address Matching

Dialogue service to confirm an end users address details

ADSL

Asymmetric Digital Subscriber Line

ALK

Access Level Key

Appointing

Dialogue service to confirm and book appointments

B2B

Business To Business

Bar 141

Prevents the use of the "141" Withhold Number prefix on a per call basis

Bar 1470

Disables the 1470 facility so that an end user's Withhold Number service cannot be overridden

Bar 1471

Allows end user's to recent the use of the 1471/Call Return service

Block Terminal

A small terminal box that is used to connect a Redcare compatible alarm to a phone line

BOL

Busy Out Line

Used to describe a high-capacity, two-way data link between an end user and an access network

BTR

BT Retail

The sales division of BT Group, selling BT Group's voice and data services to individuals and

businesses

BTW

BT Wholesale

Bundled Orders

Where a CP requires multiple single lines to be installed at the same address they may, using the

Provide Order, bundle together those multiple orders to enable all lines to be delivered at the same time.

Bypass Numbers

A second number that is associated with a line that allows a specific feature on that line to be

overridden by incoming callers to the bypass number

C&NF

Calling and Network Feature(s)

Call Return

Allows the end user, by dialling 1471, to hear the number of the last caller together with the time

and date of the call.

Call Sign

Users are provided with an second number to their existing Telephone Number. When the call sign number is dialled, the telephone connected to the line will ring with a different cadence to the

normal ring tone. Call Waiting.

Cancel Other

Enables a CP to cancel a line transfer request, where they are the losing party, where a case of

misselling has been identified.

Care Levels

Openreach offer three different levels of service when it comes to assurance, Levels 1,2 & 3,

available on Basic and Premium Single Lines and Multilines.

CCCB

Allows End Users to bar certain types of outbound calls, and/or all inbound calls

CCCD

Allows End Users to divert their calls to another number anywhere in the UK as well as to mobile

and international numbers.

CCD

Customer Committed Date

Date which Openreach commits to complete an order. This value is returned in KCI2

CDR

Call Data Records

CEM

Customer Engagement Manager

Choose to Refuse

Enables an End User to bar the telephone number of the last answered, incoming call. A maximum

of ten numbers can be barred at any one time

CLI

Calling Line Identifier

CNI

Ceased Number Intercept

Another name for Caller Re-direct

COA

Change of Address

CP

Communications Provider

(including BT Retail, BT Wholesale and Global Services)

CPA

Collaboration Protocol Agreement

CPA

Called Party Answer

CPE

Customer Premises Equipment

CPS

Carrier Pre-Select

Caller Re-Direct or Change Request

CPSO

Carrier Pre Select Operator

CR

Caller Re-Direct or Change Request

When an End User ceases service and takes up service elsewhere, or has a line renumbered, Caller Redirect can be used to refer callers to the new number, where the End User requests this.

Available in monthly or quarterly variants.

CRD

Customer Required by Date

Date the CP has requested for the service to be supplied as part of an order.

CRD

Customer Requirements

Document Document completed when applying to become a WLR3 CP

CRT

Client Reception Team

CSC

Customer Service Centre

Same as SMC (Service Management Centre)

CSP

Customer Service Plan ID

CSS

Customer Services System

CUPID

Communications Provider

CVF

Customer Verification Facility (Test

environment)

DACS

Digital Access Carrier System

A method used to carry two voice lines over a single copper pair.

DASS

Digital Access Signalling System

DDI

Direct Dialling Inward

Debt Management

A family of Openreach products which allow CPs to restrict an end user's service in a manner that

assists CPs in recovering outstanding debt.

DEDS

Data Exchange Distribution System

Contains all the Call Data Records (CDRs) that have been collected and processed from 21CN and

Legacy PSTN network for a particular CP.

DEL

Direct Exchange Line

Direct Connect

The Direct Connect service will automatically dial a pre-set number when the handset of the

connected telephone is lifted.

DMSU

Digital Main Switching Unit

DN

Directory Number

Telephone number as it appears in the Telephone Book

DOA

Dead on Arrival

Refers to a line which has just been successfully provided but is not working.

DP

Distribution Point

DPNSS

DistributionPointDigitalPrivate

Network Signalling System

A tool that allows CPs to interact with Openreach to gain information and perform certain order

fulfilment and assurance activities

DS

Dialogue Service

DSL

Digital Subscriber Line

DTMF

Dual-tone multi-frequency

DTP

Daily Transfer Process

DUNS ID

Dunn&BradstreetUniversal

Numbering Scheme

A nine-digit code assigned by D&B to identify unique business's separate and distinct operations

E2E

End to End

ECC

Excess Construction Charges

Charges in addition to normal connection charges, where additional infrastruc

ELF

Early Life Failure

EMP

Equivalence Management Platform

Openreach's strategic platform providing equal access to its products for all CPs

ETSI

EuropeanTelecommunications

Standards Institute

EU

End User

The customer who contracts with the CP for telephone service

Fault History

A CP may request from Openreach a fault history (closed faults only), covering the previous 90

days, in respect of any line they own. The CP does this with a Fault History request.

Featureline

An exchange based product available from BT Retail. Feature line provides the End User with

typical small PBX functionality, but without the need for a PBX.

Gain

Gain (or Line Gain) refers to the ratio between the signal and the background noise on the phone

line

GenIUS

Geneva Integrated Universal Solution

GER

Geneva Event Record

IACB

Indirect Access Call barring

A network-based feature that rejects any outgoing call attempt by an End User attempting to use

an Indirect Access code.

ICB

Inbound Call Barring

ID

Identifier

IDD

International Direct Dial

Indirect Access

A service which allows an End User to route an outbound call via a different call provider by dialling

an access code prior to the call

ISDN

Integrated Services Digital Network

ISDN 2

Integrated Services Digital Network

(Basic Rate)

ISDN30

Integrated Services Digital Network

(Primary Rate)

KCI

Keeping Customers Informed

Updates that a CP will receive in response to any orders that they place which have been accepted

by Openreach following order validation

KCI

Keep Customer Informed

An Order Status Update message. For example, Acknowledged, Matched, Committed, Completed,

Amend, Rejected, Cancelled, Delay Notification

KCI1

Indicates that an order has been accepted by the Openreach Fulfilment system and is being

processed.

KCI2

Informs a CP that an order has been committed to by Openreach's fulfilment systems, which means

that the job has been built, the date allocated and any excess construction charges that apply have been calculate

KCI3

Informs a CP that the order has been completed by Openreach's fulfilment systems, which means

that the order requested by the CP has been actioned and no further tasks remain outstanding

KCI4

Advises a CP that an order has been rejected due to a fatal error during the fulfilment process.

KCI5

Advises a CP that an order has been cancelled either at the request of the CP or because a fatal

error was detected during the fulfilment of an order after KCI1 (Acknowledgement) has been sent

KCID

Keeping Customer Informed – Delay

The Order Status Update (Delay Notification) message.

LEA

Law Enforcement Agency

LIJ

Left In Jumper

When Flexible Cease functionality is introduced, Openreach will leave tie pairs on the frame rather

than remove them immediately as part of the Cease process.

Line Box

A type of termination that is used with analogue lines consisting of a small box with a faceplate

that the End User can plug one telephone into.

LLU

Local Loop Unbundling

Loop Disconnect

Pulse dialling or loop disconnect dialling, also called Rotary or Decadic dialling in the United

Kingdom

LOR

Linked Order Reference

The LOR is used in SMPF Simultaneous Provide orders to link the narrowband and SMPF elements

of the order.

LORN

Linked Order Reference Number

LPA

Line Plant Availability

MAC

Migration Authorisation Code

MRORC

MattersBeyondOurReasonable

Control

An emergency state that can be declared by BT

MDF

Main Distribution Frame

MLC

Manage Line Characteristics

A Dialogue Service giving information about a line

MLO

Manage Linked Order

MPF

Metallic Path Facility

Basic product to support PSTN services

MSN

Multiple Subscriber Number

NAD

Name and Address Database

NCA

Nuisance Call Advice

NCP

Network Call Performance

NCS

Nuisance Call Service

The part of BT that provides advice on dealing with nuisance calls

Non-CLI Damage Report

Enables CPs to notify Openreach where they have identified damage to part of the network.

NSP

Non-Served Premises

NTE

Network Termination Equipment

NTE5

Network Terminating Equipment No. 5

NTP

Network Terminating Point

NTTP

Network Test and Termination Point

Number Portability

The process by which numbers are moved between different network operators

OCB

Outbound Call Barring.

Allows a CP to prevent End Users making outbound calls over the Openreach network, except to

emergency service numbers

OFCOM

The regulator for the UK communications industries, with responsibilities across television, radio,

telecommunications and wireless communications services.

OFTEL

The UK telecommunications regulator

OLO

Other Licensed Operator

PAF

Postcode and Address File

PBX

Private Branch Exchange

PE

Product Establishment

The process that CPs must go through before they are able to order the WLR3 product

PEM

Partner Enabled Management

PMSR

Project Managed Service Required

PN

Presentation Number

PONR

Point Of No Return

PPU

Pay Per Use

PSTN

Public Switched Telephone Network

QoS

Quality of Service

Scheme introduced by Ofcom which mandates CPs over a certain size to report performance

statistics in a number of areas, the purpose of which is to allow consumers to compare telecoms providers.

RCA

Route Cause Analysis

RCF

Remote Call Forwarding

When an End User ceases service and takes up service elsewhere, or has a line renumbered, Remote Call Forward (RCF) can be used to divert calls to an alternative number, where the End

User requests this

Redcare

A service that provides continuous monitoring of a telephone line that links a professionally

installed alarm system on a customer's premises to an Alarm Receiving Centre (ARC).

Retailer

A legal entity marketing and selling telecom products to end users

RID

Retailer ID

RTCC

Route To Credit Control

When applied to a line, this service automatically connects an End User to a CP help desk when the

End User attempts to make outgoing calls (including 1471 calls).

S&RM

Sales & Relationship Manager

Service Establishment

The process by which Openreach takes on and sets up new customers in order to enable them to

become a Communications Provider.

SLA

Service Level Agreement

Smart Divert

Same service as CCCD but providing the End User remote access so that the divert options can be

applied from another line.

SMC

Service Management Centre

SMP

Significant Market Power

SMPF

Shared Metallic Path Facility

Product provided on top of MPF to support Broadband services

SNDDI

Single Number Direct Dialling Inward

Social Telephony

Generic term for CP products which are designed for a section of the market who make very small

use of the phone

SQC

Structured Questioning Code

SWNS

Street Works Noticing System

T&C

Terms and Conditions

TCD

Temporary Call Diversion

Allows CPs to request that calls be diverted on a faulty line, while the fault is in the process of being repaired. TCD cannot be placed on a line until diagnostic testing has been completed as it would

impact on the testing

TCR

Technical Change Request

A maintenance change reference usually (but not always) as a result of fixing a defect.

TMA

Traffic Management Act

ToS

Temporary Out Of Service

When a CP applies Temporary Out of Service (TOS) on an End User's line a 'soft' dial tone is used and they can only call 999. All other incoming, outgoing (including via CPS) and emergency calls

will be barred irrespective of the method of dialling.

TPI

Third Party Integrator

TPIU

Tie Pair In Use

TPON

TelecommunicationsoverPassive Optical Network

TRC

Time Related Charges

Charges raised to cover time spent by Openreach engineers repairing faults, where this work is not covered under the terms of the Openreach service and for providing or rearranging services or

equipment where standard Openreach charges are not available

UXD5

A small rural telephone exchange, developed and supported within BT. The first digital exchange

in the BT network, serving a maximum of 800 customers.

VIC

Validate Import Customer

Wholesale 1571

A chargeable unbranded messaging service

Withhold Number

End Users can prevent their telephone number being released across the network on a per call or per line basis. The End User's CP must request the Withhold Number service from Openreach.

There is no charge for this service

WLR

Wholesale Line Rental

WLR3

Wholesale Line Rental 3

WTL

Working Line Takeover

WSDL

Web Services Description Language

XML

eXtensible Mark-up Language