There is a growing choice of technologies for business telecoms and Internet provision, ranging from using a standard telephone line and dial-up Internet access to installing a leased line. By using ISDN you will be able to introduce new features into your company's telephone system and make use of additional applications, which will enable your business to grow and take up any innovative opportunities offered by your customers and suppliers. Your company will take a further step from the analogue to the digital age. A digital ISDN channel has the same voice telephony usability as an analogue POTS line, but can carry data more quickly and with fewer errors.
Calls are therefore shorter, and the usability of applications is improved.
For example, a shared network connection to the Internet will be far more useable with ISDN, as additional channels can be combined giving access to more bandwidth. Each ISDN channel carries similar charges for rental and calls as a POTS business line, although charges for ISDN channels may include built-in call allowances and discounts for long term commitment, making the relative costs difficult to calculate. The equipment required on the company's premises to operate an ISDN service, such as the PBX, tends to be more expensive for ISDN than for an analogue system. To use a stand-alone computer for ISDN you need an internal ISDN card or an external terminal adapter. For computer telephony applications, an ISDN PBX with a computer interface is essential.