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Grandstream HT802 2-Port Analog Telephone Adapter
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Amazon.com: Cisco ATA 192 Multiplatform Analog Telephone Adapter, 2-Port Handset-to-Ethernet Adapter, 1-Year Limited Hardware Warranty (ATA192-3PW-K9) : Office Products
Analog telephone adapter - Wikipedia
Amazon.com : Grandstream GS-HT802 2 Port Analog Telephone Adapter VoIP Phone & Device, Black : Office Products
What Is a VoIP Adapter and How Do They Work | 8x8 | 8x8
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VoIP Gateway Micro-Analog Telephone Adapter | SmartNode M-ATA
VoIP Analog Phone Adapter | 1-to-4 FXS VoIP Phone Adapter. Made in USA
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