https://www.ebay.com/sch/i.html?_nkw=Allworx+8210051+Allworx+6X+Advanced+Multi+Site+Primary+Rfa&_sacat=0&_dmd=2

Allworx - 8210051 - Allworx 6X Advanced Multi-Site Primary - Rfa

$920.00
$679.00

Designate a Primary server and connect up to 100 Allworx systems under a single, unified.