Avaya telephone systems from IP500
Avaya IP 500 Office Business Telephone System - The Avaya IP Office IP 500 business phone systems is now on version 5 software. The Avaya IP 500 supports a range of trunk configurations, including ISDN and SIP, The Avaya IP 500 phone system supports from 2 - 272 users.includes. The Avaya IP 500 business phone system is a fully IP enabled system and will allow organisations to implement a hybrid approach to upgrading their telephone systems.