Polycom Phone and Cisco Switches: Voice VLAN By Dataprise | December 19, 2014 | Comments Off on Polycom Phone and Cisco Switches: Voice VLAN We were having trouble connecting our Polycom phone up to cisco switches. Even after adding in the options in DHCP to specify the phones, they would not come up on the voice VLAN. Best Practices are to use telephones (Cisco 79xx, Polycom CX and VVX series, etc.) with dual LAN ports on them, where one… Read More