Modern blockingfree, program controlled PABX's with digital switching field , which contain the whole servicerange of the small and medium size exchanges. Analogue and digital trunks as well as analogue and digital telephone sets and data communications equipments can be connected. The exchanges are 100% ISDN compatible and they suply the customer with the services provided by the ISDN systems, are modular and expandable . Their programs and database can be maintained by a computer.Aircondition is not necessary , they are noise free and can be installed anywhere.
According to the size of the exchange an appropriate switchboard and accessories can be connected /voice-mail, tarifsystem,CTI, Call Center , autoattendant/.
Although the majority of the applications today is based on TDM technology, the software of the PABX are capable to work with VoIP lines and extensions.
Avaya communication is basically built on IP voice and data technology.