Helping Your Business Communicate
Public Switched Telephone Network (PSTN) refers to a dedicated single line used for voice and data transmission. This connection allows a customer to make and receive calls and is used to support an ADSL (Asymmetric Digital Subscriber Line) or FTTC (Fibre To The Cabinet) broadband connection for data or internet access.
ISDN2 is a digital Integrated Services Digital Network (ISDN) service designed to support 2-8 concurrent calls, and supplied in blocks of 2, with the option of adding DDI numbers. Ideal for smaller businesses, this type of circuit is connected to a PABX phone system to route calls.
ISDN30 is a digital ISDN service designed for larger businesses needing more than 8 concurrent calls. An ISDN30 circuit supports up to 30 concurrent calls on one bearer, although further bearers can be added to provide additional lines on the same number(s). ISDN30 also has the option to add DDI numbers and is connected to a PABX phone system to route calls.