Products Customer Service Support What's New How to Buy About Us Job Opportunities Clearance Items ©2008 Cortelco, Inc. Home > Products > Single-Port Analog Terminal Adaptor Single-Port Analog Terminal Adaptor Model: 821121-ATA-PAK Downloads 8211 ATA Brochure 8211 ATA Quick Start Guide 8211 ATA Manual Features: SIP standardization One Voice Port (RJ-11) Call switching between VoIP and PSTN calls Supports FSK Caller ID, Hold, Call Waiting, Call Transfer and Call Forward PSTN line default in case of power failure