High Quality Content by WIKIPEDIA articles! Ethernet Routing Switch 5500 system or (ERS-5000) in computer networking are stackable layer 3 switches designed and manufactured by Avaya. capable of stacking 8 switches in a 640-Gbit/s fast stacking configuration. This switch was used as the access layer device for the 2010 Winter Olympics games. The 817 access switches supported 8782 voice over IP telephones.