If you're confused by any of the terms we use to describe our services, just look below for an explanation.

Access number
When you make a call using a calling card, you have to dial an access number (0800, 0207 or 0845). You then enter your PIN number followed by the destination number before being put through.

Dialler
A dialler (sometimes called a Smartbox) is a small device which you pug between your existing handset and the telephone socket on the wall. It listens for when you lift the handset and then dials the access number for you.

0207 access
It's important to remember 0207 numbers are charged, in other words they're not free like 0800 numbers. Some mobile operators block incoming calls from freephone numbers, but you can still make use of the service and save money by dialling the 0207 access number instead.

Freephone access
Calls to numbers starting "0800..." are free. Some mobile operators block incoming calls from freephone numbers, but you can still make use of the service and save money by dialling the 0207 access number instead.

Call access
See "0207 access". Numbers starting "0845..." are charged at local rate. 0207 numbers are, too, but only for customers dialling within the Inner London area. So if you're in London, use the 0207 access number; if you're outside, you should use the Lo-Call 0845 number.

Landline
Landline is the term for any telephone (corded or wireless) that operates over a standard telephone line ? in other words, it's not a mobile.

Dialler
A Smartbox (sometimes called a Dialler) is a small device which you pug between your existing handset and the telephone socket on the wall. It listens for when you lift the handset and then dials the access number for you.

Fixed line
A fixed line ? sometimes referred to as a landline - is the term for any telephone (corded or wireless) that operates over a standard telephone line ? in other words, it's not a mobile.

PIN
You will find your PIN - Personal Identification Number ? on your calling card under the grey scratch-off panel on the back of the card. It identifies you to the platform as a valid user when you dial the access number.

Platform
Nothing to do with railway stations. The "platform" is what you're calling when you dial the access number. Once your call is "on the platform" it can be sent off to your destination number, ie the person you want to speak to.

Premium Rate Numbers
Numbers starting "09..." are charged at a special (higher) rate. It's not unknown for these to attract costs of up to £1 a minute. They usually reserved for users trying to access specialist information: approach with caution.

PRS ? Premium Rate Service
PRS is the name given to numbers starting "09..." which are charged at a special (higher) rate. It's not unknown for these to attract costs of up to £1 a minute. They are usually reserved for users trying to access specialist information.