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Mitel 3300 Direct Inward System Access (DISA) Allows external callers to access the system by using a special trunk.

The system sees the DISA trunk as a station with its own Class of Service and Class of Restriction. Calls that enter the system on DISA trunks have access to a variety of system features. In all cases, the DISA trunk can be assigned account codes to provide a high degree of security or additional options.

January 2012: Telefonix Voice & Date and Mitel have parted company, and we no longer carry the Mitel telephone system, deepening our specialisation in Avaya IP500 instead. This leaves us, however, in an excellent position to compare the Mitel 3300 phone system and the Avaya IP Office phone system: please contact us using the web or on 01252 333888 if you wish to discuss these phone systems.

Mitel 3300 Phone System A-Z