The Cisco ATA 186 Analog Telephone Adaptor is a handset-to-Ethernet adaptor that turns traditional telephone devices into IP devices. Customers can take advantage of the many new and exciting IP telephony applications by connecting their analog devices to Cisco ATAs. Netvision Technologies offers 90 days Warranty and the lowest price on used Cisco ATA 186 / 188. All Cisco ATA 186 / 188 are fully tested and guaranteed for quality and performance.