BT Terminology

You may see BT engineers moving "E side" or "D side" connections. Here’s a note about them..

E-SIDE (Exchange Side) - Exchange to PCP D-SIDE (Distribution Side) - PCP to Customers PremisesThe "PCP" is the "Primary Connection Point". These are usually green cabinets that are located at the side of the road. The PCP connects the wires from the customer’s home / office to a pair of wires from the exchange.

If the connection is FTTC then the copper cables from the "D Side" connect into a fibre connection going to the exchange, thus making the distance to the exchange shorter. FTTC uses VDSL which uses a larger amount of frequency space than ADSL, 30MHz rather than 1Mhz.

Unfortunately this can mean that there are far more devices in the home that have the potential to interfere with your broadband service (i.e. Microwaves at 2MHz).To get the speed benefits of VDSL, it is expected that the final length of cable from the PCP (Primary Connection Point) and your home, the D-Side Copper, is no more than 4500 ft (1.4Km)

Other BT Acronyms…

21CN BT’s 21st Century Network
3G 3rd Generation
AAL5 ATM Adaptation Layer 5 - This most typically encountered as an ADSL thing but if you need to know about it and you don’t already then you have problems.
ACE Automatic Cross-connect Equipment
ACGF Access Gateway Control Function
ADM Add-drop Multiplexer
ADQ Application-Driven Quality of service
ADS Access Delivery System
ADSL Asymmetric Digital Subscriber Line
ADSL2+ Asymmetric Digital Subscriber Line, version 2+
AJB Adaptive Jitter Buffer
AP Aggregation Point
APH Aggregation Point Handover
API Applications Programming Interfaces
ARBD Activity Required By Date
ASDH2 Access Synchronous Digital Hierarchy, stage 2
ASP Application Service Provider
ATM Asynchronous Transfer Mode
AWDM Access Wavelength Division Multiplexing (WDM)
B2B Business to Business
BAR Broadband Access Router
BAU Business As Usual
B2B Business to Business
BB Broadband
BCM Business Continuity Management
BES Backhaul Extension Service
BF Border Function
BGW Border Gateway
BHCA Busy Hour Call Attempt
BIP Business Intelligence Platform
Bit/s Bits per second (Bandwidth)
BNS Backhaul Network Services
BRAS Broadband Remote Access Server
BSIA British Security Industry Association
BSS Business Support System
BWM Bandwidth Manager
C2M Concept to Market
CAA Civil Aviation Authority
CDD Contractual Delivery Date
CDR Call Detail Record
CE Customer Experience
CG Customer Gateway
CLI Calling Line Identity
CMSAN Copper Multi Service Access Node
CMC Customer Management Centre
CoS Class of Service
COTS Commercial Off-The-Shelf
CP Communications Provider
CPA Call Party Answer
CPE Customer Premises Equipment
CPNI Centre for the Protection of National Infrastructure
CPS Carrier Pre-Select
CR Change Request
CRD Customer Required Date
CRF Customer Requirements Form
CS Call Server
CSAT Customer Satisfaction
CSI Customer-sited Interconnect
CSH Customer Sited Handover
CSM Customer Service Management
CT Cycle Time
C-VLAN Customer (inner) Virtual Local Area Network
CWDM Coarse Wavelength Division Multiplexing
DA Directory Assistance
DACS Digital Access Carrier System
DASS Digital Access Signalling System
DCN Data Communications Network
DDQ Dedicated Downstream QoS (Quality of Service)
DISC Digital International Switching Centre
DJSU Digital Junction Switching Unit
DLE Digital Local Exchange
DLTE Digital Local Tandem Exchange
DMSU Digital Main Switching Unit
DNS Domain Name System/Server
DPCN Digital Private Circuit Network
DPI Deep Packet Inspection
DPNSS Digital Private Networking Signalling System
DSL Digital Subscriber Line
DSN Derived Services Network
DSLAM Digital Subscriber Line Access Multiplexer
DSP Deployment Strategy Plan
DWDM Dense Wavelength Division Multiplexing
DWSS Digital Wideband Serving Section
DXC Digital Cross-connect
E2E End to end
E&C Emergency and Critical
EA Environment Agency/ Emergency Authority
EDC Experience Development Centre
EEA Ethernet Edge Aggregation [device]
EET Equipment Engaged Tone
ELF Early Life Failure
EM Element Manager
EMP Equivalence Management Platform
ENA Energy Networks Association
ENUM Electronic Numbering
EOI Equivalence of Input
EP Extension Path
ERT Expected Resolution Time
ETMT Enhanced Trial Monitoring Team
ETSI European Telecommunications Standards Institute
EU End user
EUA End User Access [BT]
FCR First Contact Resolution
FMSAN Fibre Multi Service Access Node
FNET Featurenet
FOA First Office Application
FR Frame Relay
FRIACO Flat Rate Internet Access Call Origination
FRR Fast Re-Route
FTTC Fibre to the Cabinet
FTTP Fibre to the Premises
FW Fire Wall
GbE Gigabit Ethernet
GE Gigabit Ethernet
GFP Generic Framing Procedure
GR Graceful Restart
GTC Generic Test Controller
GTPS Government Telephone Preference System
GW Gateway
HNI Huawei Northern Ireland
HSPA High Speed Packet Access
HTTP Hyper Text Transfer Protocol
IBH In-building Handover
IC Interconnect
ICT Information and Communication Technology
IEEE Institute of Electronic and Electrical Engineers
IETF Internet Engineering Task Force
IMS IP Multimedia Subsystem
IN Intelligent Network
INAP Intelligent Network Application Protocol
INDB Intelligent Network Database
i-Node Intelligence Node
IP Internet Protocol
IPN Internet Protocol Networks
IPv4 Internet Protocol Version 4
IPv6 Internet Protocol Version 6
IPVPN Internet Protocol Virtual Private Network
IPX IP Exchange
ISDN Integrated Services Digital Network This is a digital phone line
ISH In Span Handover
ISI In Span Interconnect
ISP Internet Service Provider
ISUP Integrated Services User Part
ITE Integrated Transfer Engineering
ITU International Telecommunications Union
IUP Interconnect User Part
IVR Interactive Voice Response
KBD Knowledge Based Diagnostics
KCI Keeping the Customer Informed
KPI Key Performance Indicator
L2C Lead to Cash
L2TP Layer 2 Tunnelling Protocol - this is used in the provision of the broadband circuits.
L3 CAT Layer 3 Catalyst switch (a device for aggregating traffic)
LAC L2TP Access Concentrator
LAG Link Aggregation
LAN Local Area Network
LDP Label Distribution Protocol
LIP Launch and Integration Process
LIU Line Isolation Unit
LL Liberal Label
LLU Local Loop Unbundling
LNS L2tp Network Server- a router which terminates the broadband connections from customer routers. IC’s LNS devices provide constant quality monitoring of your broadband connections - you don’t get that from SKY or BT - you can see the graphs within the my.ic.uk portal
LPA Logical PoP Aggregator (a router that aggregates the traffic from BRASs at a broadband point of presence)
LTE Long Term Evolution
MAC Medium Access Control
MAC Migration Authorisation Code
MCC Migration Control Centre
MDF Main Distribution Frame
MDS Master Deployment Schedule
MF Multi-Frequency
MGW Media Gateway
MIME Multipurpose Internet Mail Extension
MISP Mobile Internet Service Provider
MM Multimedia
MNO Mobile Network Operator
MPF Metallic Path Facility
MPLS Multi Protocol Label Switching but that does not help much really in understanding. IC use this to provide super fast private networks for both ourselves and for customers. IC provides 2 main types of MPLS network. Layer 2 (switched) private point to point or point to multi-point networks called VPLS and Later 3 (routed) private networks which function like a large single private distributed router.
MS Media Server
MSA Master Services Agreement
MSAD Multi-service Access Device
MSAN Multi-Service Access Node
MSIL Multi Service Interconnect Link
MSIP Multi Services Intranet Platform
MTBF Mean Time Between Failure
MUX Multiplexer
NAL Network Assurance Laboratory
NGA Next Generation Access
NGN Next Generation Network
NGNCC Next Generation Network Call Conveyance
NGS Next Generation Switch
NICC Network Interoperability Consultative Committee
NIPP National Information Publication Principles
NISCC National Infrastructure Security Co-ordination Centre
NMC Network Management Centre
NMS Network Management System / Server
NTE Network Termination Equipment
OA Operator Assistance
OAM Operations Administration and Maintenance
OCP Other Communications Provider
ODM or ODMF Operational Data Management Framework
ONBS Openreach Network Backhaul Service
ONES Openreach Network Extension Service
OSS Operational Support System
OTD On Time Delivery
OTN On the Night
OUT Own Use Trials
NATS National Air Traffic Services
PATS Publicly Available Telephone Service
PBT Provider Backbone Transport
PBX Private Branch Exchange
PC Personal/Portable Computer
PCP Primary Cross-connection point
PDA Personal Digital Assistant
PDH Plesiochronous Digital Hierarchy
PE Provider Edge
PEW Planned Engineering Works
PF1 Pathfinder 1
PFVP Pathfinder Volume POTS
POC Point of Connection
PoH Point of Handover
PoP Point of Presence
PoR Plan of Record
POSI Point of Service Interconnect
POTS Plain Old Telephony Service
PPC Partial Private Circuit
PPM Pence Per Minute
PPP Point-to-Point Protocol
PPPoA Point-to-Point Protocol over ATM
PPPoE Point-to-Point Protocol over Ethernet
PRS Premium Rate Service
PSTN Public Switched Telephone Network
PSU Power Supply Unit
PTA PPP Termination and Aggregation
PWE3 Pseudo Wire Emulation Edge To Edge Router
QG Quality Gate
QoS Quality of Service
RAFT Resilience and Functional Testing
RAG Red, Amber, Green
RCA Root Cause Analysis
RCC Remote Concentrator Centre
RCU Remote Concentrator Unit
RDB Routing Data Base
RFC Request for Comment
RFS Ready for Service
RFT Right First Time
RHD Repair Handling Duty
RIDE Recorded Information Distribution Equipment
RR Repeat Reports
SAAS Software as a Service
SAD Same and Adjacent DLE
SAN System Alteration Notice
SBC Session Border Controller
SDH Synchronous Digital Hierarchy
SDK Software Development Kit
SDP Service Delivery Platform
SDSL Symmetric Digital Subscriber Line
SDXC Synchronous Digital Cross Connect
SFBB Super fast Broadband
SFI Special Faults Investigation
SIA Standard Interconnect Agreement
SIGTRAN Signalling Transport [protocol]
SIN Supplier Information Note
SIP Session Initiation Protocol
SIP-I SIP with encapsulated ISUP
SLA Service Level Agreement
SMDS Switched Multi megabit Data Service
SME Small Medium Enterprise
SMP Significant Market Power
SMPF Shared Metallic Path Facility
SNAP Sub-network Access Protocol
SNCP Sub-Network Connection Protection
SoR Statement of Requirements
SP Service Provider
SpoF Single Point of Failure
SPR Signalling Point Relay
SRU Subscriber Remote Unit
SS7 Signalling System No. 7
STC Safe to Connect
STM-n Synchronous Transport Module (level) n
STL Subscriber Transaction Log
STP Signalling Transfer Point
S-VLAN Service (outer) Virtual Local Area Network
T&D Test and Diagnostics
T2R Trouble to Resolve
TCP Transmission Control Protocol
TCD Target Completion Date
TDM Time Division Multiplexing
TE Traffic Engineering
TEWT Transfer Engineering Workflow Tool
TISPAN Telecommunications and Internet Services and Protocols for Advanced Networks
TMF Tele-Management Forum
TSR Telecom Strategic Review
T-Node Termination Node
UMTS Universal Mobile Telecommunications System
URU “You are you”
UXD5 A small digital exchange
VAGW Virtual Access Gateway
VC Virtual Circuit
VC-n Virtual Container (level) n
VDMT Voice Data Migration Toolkit
VIC Virtual Interconnect Circuit
VLAN Virtual Local Area Network
VLC Voice Line Control
VoIP Voice over Internet Protocol
VoNGA Voice over Next Generation Access
VP Virtual Path
vPE Voice Provider Edge Router
VPN Virtual Private Network
VSE Volume Scenario Estimate
VTGW Virtual Trunk Gateway
WAT Wide Area Tandem
WBC Wholesale Broadband Connect
WBCC Wholesale Broadband Connect Converged
WBMC Wholesale Broadband Managed Connect
WDM Wavelength Division Multiplexing
WES Wholesale Extension Service
WES-B Wholesale Extension Service Backhaul
WEES Wholesale End to End Extension Service
WiFi Wireless Fidelity
WITS Water Industry Telemetry Standards
WLR Wholesale Line Rental
WLR3 Wholesale Line Rental 3
xDSL ADSL, HDSL, SDSL, VDSL, etc.
xMPF Voice only passive access product from Openreach based on the Metallic Path Facility

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