ISDN30 is the UK's mainstream voice connection for businesses. 
If you want to know about ISDN30, then this web site is just what you need as it will give you all the information to enable you to make an informed decision.
If you need ISDN pricing on ISDN30 installation and rental, please click on the following link to e-mail us and we will respond immediately. ISDN30 PRICING ENQUIRY . We will provide the best pricing in the UK. Or you can complete our online ISDN30 order.
For information on the different types of telephone systems available that can connect to ISDN30 click here - Telephone Systems
IF YOU NEED TO ORDER ISDN30 PLEASE CLICK HERE - ORDER ISDN30
If your business needs at least 8 simultaneous voice connections to the outside world then, make no mistake, ISDN30 is what you need.
ISDN30 can be installed by BT or any reseller of network services. You HAVE TO PAY FOR 8 LINES. Therefore, if you need, say, 4 lines, you should install ISDN2e. Please click here for details on ISDN2e. Note the functionality of ISDN30 and ISDN2e is identical. ISDN30 and ISDN2e only differ in their pricing (slightly) and the way in which they are delivered to your premises.
ISDN30 is properly surveyed and pre-installed and the telephone system installation company can phone the carrier when they are ready to bring the lines into service so it can be installed with a degree of control. ISDN30 is delivered on copper wire or fibre optic cable. Note there are distance limitations with ISDN30 so premises in rural areas may really struggle to get it installed. The carrier can always install it but if it means that it has to be delivered over fibre cable due to distance then this could cost extra - sometimes thousands or tens of thousands of pounds. Where ISDN30 is not available you will be forced to install ISDN2e.
ISDN2e on the other hand is not surveyed. The appointment is booked and the BT engineers (yes BT engineers will attend regardless of who you are buying the lines from) will turn up and, more often than not, get the ISDN2e installed successfully.
For most businesses, all you need is ISDN30 plus Caller ID and level 3 cover (Level 4 cover is now available which provides a 6 hour fix). You will also need an inbound number. Note all ISDN has limitations on the number of numbers. There are 5 number slots available. A slot can be taken by a single number or a range of numbers. A range of numbers has a minimum of 10 numbers in it in multiples of 10.
Most businesses may have one single number (one slot taken) and a range of Direct Dial numbers (10 for a small company, 100 for a larger company and so on). This example would leave 3 slots free for future use for a single number or range in each slot.
