How to Upgrade – Update Cisco ATA186 / 188 Firmware and Reset to Factory Default

This article shows how to easily upgrade the firmware on a Cisco ATA 186 – 188. Instructions to reset to factory defaults is also included. You’ll also find a brief introduction on the Cisco ATA and differences between the two models.http://www.firewall.cx/cisco-technical-knowledgebase/cisco-voice/858-cisco-voice-ata-186-upgrade.html

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