Glossary
DSL Related
- DSL
- Digital Subscriber Line
- ADSL
- Asynchronous Digital Subscriber Line
- VDSL
- Very-high-bit-rate Digital Subscriber Line
- FTTC
- Fibre to the Cabinet
- FTTP
- Fibre to the Premises
- TAM
- Test Access Module
- BRAS
- Broadband Remote Access Server (Takes PPP from EU and passes it to ISP by L2TP)
- CPE
- Customer Premise Equipment (router or modem)
- DSLAM
- Digital Subscriber Line Access Modulator
- DLM
- Dynamic Line Management
- VP
- Virtual Path - a link between an Exchange and the BRAS
BT Fault Terms
See also BT's jargon buster at https://www.openreach.co.uk/orpg/home/products/serviceproducts/orderandfaulttracker/faulthandling/faulttrackerjargonbuster.do
- BBCR
- BroadBand Customer Reporting (BT)
- BBEU
- WBC EUA Service ID (Circuit ID)
- CRD
- Customer Required by Date
- CP
- Communications Provider
- ELF
- Early Life Failure - A fault soon after an install
- CDTA
- Conscious Decision To Appoint - force booking an Openreach engineer
- FTR
- Fault Threshold Rate - The speed at which the line is considered at fault
- DP
- Distribution Point
- KBD
- Knowledge Based Diagnostics
- KCI
- Keep Customer Informed
- MFL
- Main Fault Location
- KCI
- Keeping Customers Informed (BT term)
- EU
- End User
- CA
- Customer Apparatus
- MPF
- Metallic Path Facility
- MBORC
- Matters Beyond Our Reasonable Control. Used by BT to indicate that they're suspending normal fix guarantees as some external event has made it impossible to achieve them (e.g. a fire, storms, terror attack).
- AI
- Action Item
- WAC
- Work Allocation Controls (team)
- PONR
- Point of Now Return - e.g. when an engineer is booked and cannot now be cancelled.
- PCP
- Primary Cross-connect Point
- PEW
- Planned Engineering Works
- POH
- Point of Handover
- RA
- Rate Adaptive
- REIN
- Repetitive Electrical Impulse Noise
- FaultReportAdvised C
- The result after running a PSTN line test. Usually Y or N, bur C means test Inconclusive/ Not Completed - Fault Report may be raised if CP believes there is a problem on BT network charges may be incurred if the fault is subsequently shown to be off BT network
- RWT
- Right When Tested
- SIN
- Supplier Information Note [BT]
- SMTP
- Shared Metallic Path Facility
- SP
- Service Provider (e.g. AAISP)
- SSFP
- Service Specific Front Plate
- TPM
- Tie Pair Modify - The cable from the MDF (main distribution frame) to the DSLAM port is replaced
- TSO
- Technology Service and Operations - a department within BT
- WLR
- Wholesale Line Rental
- NTE
- Network Termination Equipment
- NTE5
- Network Termination Equipment, 5th version
BT Fault Locations
See also BT's jargon buster at https://www.openreach.co.uk/orpg/home/products/serviceproducts/orderandfaulttracker/faulthandling/faulttrackerjargonbuster.do
- CA
- Fault located at Customer Apparatus
- DT
- Diagnostic Test required to establish fault
- EX
- Fault located in Exchange
- LN
- Fault Located in Local Network
- CE
- Fault located at Customer Equipment. Provides further breakdown of a CA fault
- FU
- Fault Located at Frames Unit. Provides further breakdown of an EX fault.
Openreach PSTN Fault Types
Terms used to describe a fault type on a PSTN phone line. When reporting a PSTN fault to Openreach one of these terms is used to describe the fault.
- BNR
- Bell not ringing
- BR
- Bell ringing continuous
- CCS
- Call minder problems
- CDT
- Continuous Dial Tone
- CO
- Cuts off
- DRO
- Damage to aerial cables
- DRU
- Damage outside end user premises
- DRW
- Damage at the end users site
- DRA
- Damage Report Apparatus
- FNT
- Faint Transmission
- MOD
- No other equipment, retried
- NDT
- No dial tone
- NR
- Dial tone no answer
- NSY
- Noisy
- NT
- No Tone
- NU
- Number not Obtainable
- OHR
- Overhearing
- OWT
- One Way Transmission
- PET
- Permanently engaged tone
- RTP
- Ring Trip
- UTR
- Unable to trip ringing
- WNO
- Wrong Numbers Obtained
- XL
- Crossed lines
- ESF
- Exchange Service Facility
Services Related
- BT
- British Telecom
- BTOR
- British Telecom Openreach
- OR
- Openreach
- BTW
- BT Wholesale
- TTW
- TalkTalk Wholesale
- DNS
- Domain Name System/Server
- VoIP
- Voice over Internet Protocol
- CDR
- Call Detail Records - Call logs
- SIP:Session Initiation Protocol - Sets up a VoIP call.
- DS
- Delegation signer (The record used to identify the DNSSEC signing key of a delegated zone)
- IDN
- Internationalised Domain Name
- IP
- Internet Protocol
- CQM
- Constant Quality Monitoring - the name given to the monitoring graphs used on the control pages and FireBricks
- RIPE
- The Réseaux IP Européens Network - the organisation in Europe who manage IP addresses
- SIM
- Subscriber identity module
- CLI
- Caller Line Identification (re telephony)
- CLI
- Command Line Interface
Email Related
- POP3
- Post Office Protocol, Version 3
- IMAP
- Internet Message Access Protocol
- SMTP
- Simple Mail Transfer Protocol
VoIP Related
- ALG
- Application Layer Gateway - typically software in a router to try to help with VoIP calls, often needing to be disabled
Network Related
- MTU
- Maximum Transmission Unit
- MRU
- Maximum Receive Unit
- IP
- Internet Protocol
- TCP
- Transmission Control Protocol
- PPP
- Point to Point Protocol
- LCP
- Link Control Protocol
- L2TP
- Layer 2 Tunneling Protocol
Other
- IRC
- Internet Relay Chat - an online chat room, AAISP have one, see the contact page. You can talk to staff and customers