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With the introduction of new technology people are unsure which line they may require. If you’re confused then let us help you, all we need to know is what your requirements are and we’ll advise you on which line is best for you.

There are two types of telephone lines; analogue and digital. Analogue can be provided as a single line with a single number or as a multi-line which has as many lines as you would like with one single number. Multi-lines are used mainly for telephone systems in business but increasingly these are being replaced by digital lines known as ISDN lines.

ISDN lines use technology that provides efficiency as well as clarity. There are two main types; ISDN2e and ISDN30e.


VOIP, IP, SIP, ISDN, Cloud, Hosted Telephony and so on. So what do they mean?

We’ll keep it light-weight but if you want us to get in to the nitty-gritty we’d love to do so. Just ask!

In the mean time…..

CLOUD = Computers Located Over Universal Datacentres (it’s not really - we just made it up but it does sum cloud computing quite well we think)

VOIP = Voice over Internet Protocol

IP = Internet Protocol

SIP = Session Initiated Protocol

ISDN = Integrated Services Digital Network

Hosted Telephony - Telephone systems hosted in data centres

Data Centre - Secure buildings with dedicated internet access enabling many large computers to provide various services to businesses, government and individuals.


What our clients say about us

To whom it may concern.

I would like to may it known that we have received 1st class service from Z1 Telecom and Bryan Elsworthhave been superb. Whenever we have requested help they have always been willing to help over the phone or, if requested, they find the time to make a call out.

After poor service in the past from other telecommunications companies it’s been a pleasure to find Z1 and we are more than satisfied with all aspects of the company.

Thank you.

W Liversidge - D.O.T.M.O.T LTD

To whom it may concern!

I wish to recommend the services of Brian Elsworth of Z1 Telecom. He has shown himself to be industrious, knowledgeable and helpful with regard to the installation and maintenance of our telephone system.

A J Evans - Rods UK ltd

All the team at Thermofuse Pipelines Ltd would like to thank Z1 Telecom for setting up our new telephone system, internet and email facilities. The service received was excellent from start to finish and on the occasions when we have required assistance there has always been someone from Z1 there to help. Thank you for your continual service and support.

Paul Hurst - Project Manager , Thermofuse Pipelines Ltd

It’s not very often that as a company we feel inclined to write to our suppliers, other than occasions where problems have occurred, but in this case we feel it right to make an exception.

We want you to know that we have been very impressed with the quality of the service your company has provided us to date, in particular we appreciate the responsiveness and professionalism of your engineer Bryan Elsworth, without which we would probably not have made the switch from BT.

Please pass on our thanks to the staff, they have made the transition as easy as we could have wished and gone the extra mile to make sure we are fully up to speed on the new set up.

We look forward to doing business with you for years to come.

Chris Hawley - Auto-Lift UK Ltd

Parkinson & Hartley are delighted with the professional service and complete reassurance Z1 provides, with aftercare and maintenance of our telephone and broadband services.

Paul Hartley - Director , Parkinson & Hartley

Competitive trouble-free service.

Trevor J. Grice BSc. - Managing Director , Lichtgitter UK Ltd.

I would highly recommend Z1 to anyone! We’ve had their telephone system installed now for a year now and the whole set up was trouble free thanks to Dan. The support they’ve shown over the year with any queires has been fantastic, in particular Dan and Bill.

Tony Snowden - Mitsubishi Motors - Oakley Service Station Ltd