An Analogue Line is a single copper cable that can also be known as a PSTN Line. Analogue Lines can be used for voice & data circuits. You will only be able to make or receive 1 phone call at a time with an Analogue Line and only one phone number is associated, these lines are used for voice, fax, credit card machines and ADSL/fibre broadband Connections.
ISDN2 also known as ISDN2e, is a digital telephone line which allows a business to make or receive two simultaneous voice calls over a single copper line. ISDN2 lines are normally connected to an onsite PBX which will allow the customer to make or receive two simultaneous calls at one time. You can only have 2 channels (lines) per ISDN2 Circuit. If you require more than 8 Lines, we would recommend you install an ISDN30 Circuit.
This is ideal for medium to large businesses, and provides from 8 to 30 telephone channels (lines). This allows up to 30 simultaneously inbound and outbound calls at one time. ISDN30e channels are delivered over either a Fibre optic or copper path and terminates on the customer’s telephone system (PBX). An ISDN30 connection also gives you the choice of an unlimited number of DDIs (Direct Dial In).