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Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP, Version 1.0 - Cisco ATA 187 Analog Telephone Adaptor Overview [Cisco ATA 180 Series Analog Telephone Adaptors] - Cisco
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Amazon.com: 2-Port VoIP SIP Phone Adapter - GT202 Wireless Router, Supports WiFi Asterisk ATA VOS FXS Fax. Suitable for Home or Business (Black) : Office Products
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