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Lucid Systems Jargon Buster

We know that technical jargon can be overwhelming. That’s why we work hard to ensure that you’ll always understand what we are recommending and why.

Here’s a handy jargon buster to help you understand more about the different types of business broadband available.  


ISDN (Integrated Services Digital Network): This allows you to send voice and data at the same time. Small businesses will be relying on ISDN lines to connect their broadband as it allows you to make phone calls on a landline and plug in your broadband router using the same port.

Fibre Optic Broadband: Broadband services are delivered through fibre optic cables rather than traditional copper lines, offering a faster internet speed.

FTTC (Fibre to the Cabinet): Most businesses will use FTTC lines, which use infrastructure from your business premises to your local street cabinet. A common example of an FTTC connection is something like BT Infinity. You can benefit from a fast, reliable broadband connection at an affordable price. 

FTTP (Fibre to the Premises): We highly recommend FTTP connections for businesses because it ensures direct installation of the fibre optic lines from the exchange, direct to your premises. FTTP guarantees fast speeds and a reliable internet connection. With download speeds of up to 330MB, FTTP is ideal for businesses who rely on video conferencing, uninterrupted access to cloud-hosted software and manage their businesses via internet connectivity.

PBX (Private Branch Exchange): This is a private telephone network used by businesses with multiple phone lines. Features of a PBX include extension dialling, hold music and call conferencing. Some businesses may have an on-premise PBX, whist others will make use of a VOIP-based PBX.

PSTN (Public Switched Telephone Network): This is most commonly known as a phone line. Most small businesses will operate via a PSTN, which allow landline calls to be made. BT will be retiring PSTN and ISDN lines in 2025, so small businesses may need to prepare to switch to an alternative connection.

VoIP (Voice over Internet Protocol): This allows you to make phone calls via an internet connection, rather than a traditional phone line. Many businesses are starting to make the switch from ISDN lines to VoIP telephone systems.