So you have been hearing a lot about ISDN services and PSTN services but wish to understand the difference a little more clearly. To begin with, both PSTN and ISDN are telecommunication technologies like the VOIP telephone systems. These two represent a kind of telecommunication network that has evolved in the last few years to cater to the functionalities, requirements, and demands of the changing markets and end-users. Australia has witnessed a huge change in every form of communication be it video conferencing, phones or messaging. Let’s get to PSTN and ISDN now.

PSTN Definition
This one hails from old-school landline telephones. In an elaborated form, the acronym PSTN is expended as “Public Switch Telephone Network”. It is the forebearer of modern tech that is currently connecting thousands of businesses and homes across Australia. It is one of the best with respect to meeting everyday connectivity demands. PSTN networks offer connectivity via analogue data that is relayed through copper wires to allow conversation from one end of Australia to another. It is often considered a standard telephone service against digital integration.

ISDN Definition

ISDN can be considered the new, shinier cousin of PSTN and just like its predecessor it is an acronym that is extracted from “Integrated Services Digital Network”. You may have heard the term as there is too much discussion about Telstra ISDN services. Basically, ISDN offers digital transmission of information and data with much more flexibility than PSTN networks. On average, almost every household and business in Australia is making full use of ISDN for regular communication requirements. There are some rural areas that are still using old-school analogue copper wires but most others have shifted to ISDN networks. ISDN has been operational since 1991 and has been used by several businesses to get access to multiple lines.

Other Related Terms
Basic Rate interface (BRI): The Basic Rate Interface (BRI) is one of the most regular telecommunications services used by individual households and small businesses. It offers the capacity to meet specifically lower demands. Regarding facts and figures, it includes two 64 kbit/s voice channels and a 16 kbit/s signalling channel that goes up to 144 kbit/s.

Primary Rate Interface (PRI): The Primary Rate Interface (PRI) shares the biggest chunk of ISDN telecoms as it meets bigger demands placed by large sized companies and call centers. It comes with a heavy-hitting capacity that goes up to 2048 kbit/s and includes up to 30 simultaneous and individual channels as well as calls at a frequency of 64 kbits/s apiece along with signalling and timing channels. Depending on business requirements, these larger-scale ISDN options are normally bundled in blocks of 30, 10 and 20.

What’s The Basic Difference Between PSTN and ISDN?

Both PSTN and ISDN are used across Australian businesses and households. As clear by the definitions, the first striking difference is about one being analogue and another being digital data transmission technology. PSTN comes with a much more extended history than ISDN. Apart from that ISDN is way more advanced and has a much larger capacity as compared to PSTN.

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