the Cisco Ata 187 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.the Cisco Ata Products Are Standards-based Communication Devices That Deliver True, Next-generation Voice-over-ip (voip) Terminations To Businesses And Residences Worldwide.