
Adtran Netvanta 7100 is relatively cheap, easy to use, and great for small businesses. Nortel BCM 50 is a more complex system including a series of applications like unified messaging, call-center, conferencing and paging. This and Cisco SBCS are robust systems that are not very simple to use. Fonality PBXtra and Avaya One-X Quick Edition are both simple and easy for LMS users of all skill levels to manage.
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