The All-IP Jargon Buster: Decoding the Acronyms of the Digital Transition

In today’s fast-paced world, technology evolves at an astonishing rate, shaping the way we communicate and connect. The current shift towards an All-IP network infrastructure, often referred to as the Great British Switch Off, is dramatically changing the telecommunications landscape. Navigating this transformation isn’t always a walk in the park, especially when you’re bombarded with a barrage of acronyms and jargon that seem more like cryptic codes. Fear not, for we’ve got you covered with our comprehensive jargon buster to help you unravel the mysteries behind the terminology.

ADSL – Asymmetric Digital Subscriber Line

Starting off our journey through the alphabet soup is ADSL or Asymmetric Digital Subscriber Line. A technology that enables faster data transmission over traditional copper telephone lines, offering higher download speeds than upload speeds. Being switched off in 2025.

ATA – Analogue Telephone Adapter

The ATA, or Analogue Telephone Adapter, is a device that lets you connect traditional analogue telephones or fax machines to a digital network, allowing them to work with newer IP-based systems.

BB – Broadband

You’re probably familiar with this one! Broadband, often abbreviated as BB, refers to high-speed internet access that provides a significant amount of data transmission capacity.

BT – British Telecom

BT, or British Telecom, is a well-known telecommunications company.

CF – CityFibre

CityFibre, often denoted as CF, is a company at the forefront of building and expanding fibre-optic networks across cities, offering high-speed internet services to businesses and homes. Deep Blue are proud to work with CityFibre to bring next generation connectivity to our customers.

CLOA – Customer Letter of Authority

The Customer Letter of Authority (CLOA) is a document that grants permission to a third party to take specific actions on behalf of a customer, such as managing their telecommunication services.

CNI – Critical National Infrastructure

CNI, or Critical National Infrastructure, refers to the essential systems and assets that are vital for a country’s functionality and security. Did you know that telecoms workers were classed as key workers during the 2020 lockdown? The Team at Deep Blue did an amazing job juggling the pressure of assisting our end users in switching to home working whilst also adapting to the home changes lockdown brought (we’re looking at you home schooling!). Well done Team!

CP – Communication Provider

CP stands for Communication Provider, which is a company or organisation that offers communication services, such as telephone, internet, and broadcasting. Like Deep Blue!

CRFS – Customers Ready For Service

CRFS represents Customers Ready For Service, indicating that a specific service or connection is available and operational for customers to use.

DB – Deep Blue

No not the chess-playing computer, DB here refers to Deep Blue or to give us our full title: Deep Blue Networks Ltd. With nearly two decades of experience this isn’t the first time we’ve helped customers navigate the change from one technology to another.

DDI – Direct Dial In

Direct Dial In (DDI) is a feature that allows callers to directly reach a specific extension or individual within an organization without going through a receptionist or automated menu.

EoNWD – End of Next Working Day

EoNWD, or End of Next Working Day, sets expectations for when a particular action or service will be completed.

EU – End User

End User (EU) simply refers to the final consumer or recipient of a product or service.

FTTC – Fibre To The Cabinet

FTTC, or Fibre To The Cabinet, is a technology that brings high-speed fibre-optic cables to street cabinets, improving internet speeds over existing copper connections. Being switched off in 2025.

FTTP – Fibre To The Premises

FTTP, or Fibre To The Premises, takes it a step further by delivering fibre-optic cables directly to homes or businesses, offering even faster and more reliable connections.

FUP – Fair Use Policy

Fair Use Policy (FUP) outlines the acceptable and reasonable usage limits for a service to ensure fair access for all users.

GSO – Great Switch Off

The Great Switch Off (GSO) signifies the transition from traditional analog communication systems to the All-IP network infrastructure. Also called the Great British Switch off and the Big Switch off.

IP-PBX – Internet Protocol private branch exchange

IP-PBX is an Internet Protocol private branch exchange, which is a private telephone network used within an organization that supports both traditional and IP-based communication.

ISDN – Integrated Services Digital Network

Integrated Services Digital Network (ISDN) is a set of communication standards that enables digital transmission of voice, video, and data over traditional copper lines. Being switched off in 2025.

KYC – Know Your Customer

Know Your Customer (KYC) involves the process of verifying the identity of customers, often required for regulatory compliance.

LLU – Local Loop Unbundling

Local Loop Unbundling (LLU) allows different communication providers to use the same physical infrastructure, like telephone lines, to offer their services.

LOA – Letter of Authority

The Letter of Authority (LOA) is a formal document granting permission or authorisation for a specific action.

MBM – Main Billing Number

The Main Billing Number (MBM) is the primary number associated with a service that may have multiple numbers associated with it, for example an ISDN circuit with DDi blocks.

MPF – Metallic Path Facility

Metallic Path Facility (MPF) refers to the physical copper line connecting a customer’s premises to the communication network.

NTE – Network Terminating Equipment

Network Terminating Equipment (NTE) is the device installed at a customer’s location that connects their internal wiring to the service provider’s network.

OTT – Over The Top

Over The Top (OTT) services deliver content (like streaming media) directly to users over the internet, bypassing traditional distribution methods.

PBX – Private Branch Exchange

Private Branch Exchange (PBX) is a telephone exchange system used within an organisation to manage internal and external calls. Not all of these will be compatible with the All-IP network.

PSTN – Public Switched Telephone Network

The Public Switched Telephone Network (PSTN) refers to the traditional circuit-switched telephone network used for public telecommunications. Being switched off in 2025.

SIP – Session Initiation Protocol

Session Initiation Protocol (SIP) is a communication protocol used for initiating, maintaining, modifying, and terminating real-time sessions, such as voice and video calls over IP networks.

SMPF – Shared Metallic Path Facility

Shared Metallic Path Facility (SMPF) indicates that multiple services share the same physical copper line.

SOADSL – Single Order Symmetric Digital Subscriber Line

SOADSL, or Single Order Symmetric Digital Subscriber Line, is a service that provides equal download and upload speeds. Being switched off in 2025.

SOGEA – Single Order Generic Ethernet Access

SOGEA, or Single Order Generic Ethernet Access, offers a broadband connection without the need for a traditional phone line.

SOGFAST – Single Order G.Fast

SOGFAST, or Single Order G.Fast is a single-order broadband service using G.Fast technology for faster speeds.

SOTAP – Single Order Transitional Access Product

SOTAP, or Single Order Transitional Access Product is a technology created to deliver a copper path between network terminating equipment (NTE) at broadband customers’ premises as well as a main distribution or jumper frame at the exchange point.

SVR – Site Visit Reason

Site Visit Reason (SVR) indicates the purpose or rationale behind a scheduled site visit.

VDSL – Very high-speed Digital Subscriber Line

VDSL, or Very high-speed Digital Subscriber Line, provides faster data transmission over traditional copper lines than standard ADSL. Being switched off in 2025.

V-IP – Virtual Internet Protocol

V-IP, Virtual IP or Virtual Internet Protocol is an IP address that does not correspond to a physical network interface.

VoIP – Voice over Internet Protocol

Voice over Internet Protocol (VoIP) enables voice communication and multimedia sessions over the internet

WLR – Wholesale Line Rental

Wholesale Line Rental includes fixed-line services, like voice and broadband. It allows CPs like Deep Blue to provide these services without the need to own the physical infrastructure.

WLR Products – Wholesale Line Rental Products

Under the umbrella of WLR, a spectrum of products is available to cater to various communication needs. Many of these will be switched off in 2025.

  • WLR3 Analogue: a traditional voice service that’s been a cornerstone of telecommunications
  • ISDN2 and ISDN30: Integrated Services Digital Network (ISDN) solutions, including ISDN2 and ISDN30 use digital communication capabilities, enabling simultaneous voice and data transmission for enhanced connectivity.
  • SMPF and SLU SMPF: Shared Metallic Path Facility (SMPF) and Sub Loop Unbundling (SLU) SMPF allow multiple services to share the same physical copper line.
  • Narrowband Product(s) Line Share: Narrowband Product(s) Line Share is designed for efficient utilisation of resources, ensuring the most effective use of existing network infrastructure.
  • Classic: The fundamental voice service.

WLT – Working Line Takeover

Working Line Takeover enables customers to switch between communication providers without disrupting their existing services.

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Deep Blue Telecom Excels as ThreeUK Dominates Mobile Network Performance: Ofcom Highlights

In a recent overview of mobile network performance by Ofcom, in partnership with Opensignal, ThreeUK has demonstrated stellar performance, particularly in 5G. This concise breakdown delves into key insights from the report:

Dominance of Cellular Networks

4G remains the most used, with users on this network 88% of the time. As 3G phases out, the focus shifts to providing extensive 4G coverage. 5G, though new, shows potential with growth expected as 5G SA (Service Assistance) services launch. Wi-Fi continues to be a primary choice, with 62% usage.

5G’s Growing Edge

5G outperforms with a 98.4% data connection success rate, higher download speeds (averaging 129.9 Mbit/s) and almost double the upload speeds of 4G. ThreeUK notably leads in 5G download speeds.


ThreeUK consistently outshines competitors in multiple categories, including top 5G and 4G download speeds. The variance in performance among 3G, 4G, and 5G networks regarding download times of different file sizes was also examined.

Connection Speeds Analysis

ThreeUK presents the fastest average 5G download speed. In terms of upload, 5G averages 14.7 Mbit/s, significantly outpacing 4G’s 7.6 Mbit/s.

Choosing Deep Blue Telecom, bolstered by Three, ensures businesses get optimum mobile technology benefits. With Three ranking top-tier in performance, businesses can expect efficient data access, swift file sharing, and consistent connectivity across the UK. This partnership guarantees an uninterrupted user experience, allowing firms to concentrate on primary tasks and forget network concerns.

Explore how Deep Blue Telecom can empower businesses in the mobile tech sphere. Call our team today, 0333 240 9100 to discuss your mobile options.

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Why Switching to FTTP is no longer just an option

The digital clock is ticking! The world as we know it, especially in terms of internet connectivity, is rapidly changing. If you’re still relying on a traditional landline set-up, you need to know: The switch-off is coming, and this isn’t just about upgrading — it’s about staying connected.

FTTP, or Fibre to the Premises, is not just another tech fad. It represents a transformative shift in how we access the internet. Unlike the mixed bag of copper and fibre in traditional set-ups, FTTP provides a pure fibre optic connection directly to your home or office.

Here’s why this is urgent:

The Inevitable Switch-off

It’s not just a rumour. Traditional landline set-ups are being phased out. If you don’t make the move to FTTP, you risk losing your internet connection altogether.

Experience Superior Speed

With FTTP, buffering becomes a forgotten annoyance. Enjoy ultra-fast downloads, seamless streaming, and responsive gaming.

Economical in the Long-Term

Although there might be an initial investment, the maintenance costs of FTTP are significantly lower. Plus, no more spending on speed boosts or add-ons.


This isn’t just about keeping up with the times. It’s about ensuring you have a stable and reliable connection for years to come.

Property Value Increase

A direct FTTP connection not only enhances your online experience but also raises your property’s market value.

The switch-off isn’t just a hypothetical future event; it’s a reality we all need to prepare for.

If you’re on a traditional landline, your connectivity is on borrowed time. Reach out to a reputable FTTP provider, understand the migration process, and ensure your uninterrupted digital future.

While change can often feel daunting, this is one change you can’t afford to delay. With the impending switch-off, moving to FTTP isn’t just about superior internet access; it’s about ensuring you remain connected in this digital age. Don’t be left offline. Call our team to discuss your options on 0333 240 9100. Make the proactive switch to FTTP today!

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Full Fibre to help SMEs fulfil their digital potential

As the UK’s small and medium-sized businesses (SMEs) adopt more hybrid and flexible ways of working in the wake of the COVID-19 pandemic, it is accelerating a move towards cloud-based services like Office 365 and Zoom, a move that also brings with it a greater demand for bandwidth. 

For many businesses however, this currently means putting even greater pressure on their outdated and unreliable copper-based connection, because historically the only other choice available to them has been the leap to a much more costly leased line service that most SMEs are just not able or ready to commit to.

This unenviable choice between poor copper and expensive high-end services has cost businesses valuable time and money, with 38 hours a year on average being lost due to slow or dropped connections…a failure which is costing the UK a whopping £11 billion per annum (or the entire GDP of Mozambique)! 

And the stakes couldn’t be higher, with SMEs making up 99.9% percent of businesses in the UK and accounting for three-fifths of the employment and around half of turnover in the UK private sector, it is their success that is crucial to the country’s economic recovery and long-term success. (Federation of Small Businesses, 2021: https://www.fsb.org.uk/uk-small-business-statistics.html)  

But all is not lost. For SMEs looking for a resilient solution that meets all their connectivity requirements today, but also gives them the foundations to future-proof their business as they look to grow in the future, there is now the option of a Business FTTP service, powered by CityFibre and available via Deep Blue.

The UK’s largest independent digital infrastructure platform is looking to bridge the gap between basic consumer-grade connections and high-end services​.

So why is this service such a game-changer for SMEs: 

  • Incredibly affordable price point 
  • Gigabit-capable, symmetrical speed
  • Quick and easy installation
  • Compared to copper-based services, Full Fibre is less likely to be disturbed once it’s in the ground and doesn’t suffer any variation from poorer weather elements
  • Robust SLAs providing fast response and fix times  
  • Full Fibre service meaning it isn’t impacted by the PSTN switch off in 2025 

If you’re an SME business looking for more information about CityFibre’s Business FTTP product or you simply want to get more help and advice on your connectivity options, please get in touch with us today by email theteam@deepbluetelecom.co.uk or call 0333 240 9100.

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Stop Sell September

Whilst there’s a chance of sounding repetitive, it’s essential to highlight the forthcoming PSTN stop sell. The PSTN, or Public Switched Telephone Network, has served as the backbone of our telephone and broadband connections in the UK for many years. However, its days are numbered, and a transition away from it is on the horizon. Although the complete switch-off won’t occur until 2025, significant changes are just around the corner and these will affect you at the office and at home.

It’s all change

The initial phase of the PSTN switch-off involves the stop sell of services that rely on the network. This means traditional analogue telephone services (landlines) and broadband services like ADSL and FTTC will no longer be available.

You might think, “We’ve heard this all before,” and you’d be right. However, as the PSTN stop sell date approaches, it’s essential to grasp the implications.

No New Sales

For those seeking a new broadband or telephone connection, whether you’re changing providers, renewing your contract, or relocating, you’ll no longer be able to purchase any service that utilises the copper telephone network. This includes standard broadband and fibre to the cabinet options, as well as landline telephone connections.

No Changes

Even if you’re already using copper-based broadband or telephone services, making changes to your existing plan will become impossible. That means no speed upgrades or switching to a different provider. Furthermore, repairs on the copper network will decrease, potentially leaving you without service in case of a significant fault.

What else could be affected?

If you’re relying on services tied to the PSTN, such as connected alarms and CCTV, be prepared for potential disruptions. These services will need to be transitioned to the new all-digital network infrastructure.

Thankfully, service providers like Deep Blue have been diligently working to make the transition from copper services as seamless as possible. Our advanced connections utilise the UK’s fibre network and will keep you connected long after the PSTN is retired. Additionally, you’ll have access to a new form of telephony known as Digital Voice, which leverages VoIP (Voice over Internet Protocol) technology for internet-based phone calls.

If you haven’t received information about upgrading your services or want to explore your options further, call our team on 0333 240 9100 and explore Deep Blue’s broadband and Digital Voice pages. Embracing the transition now will ensure you continue to enjoy reliable and up-to-date communication services.