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Cisco ATA 192 Multiplatform Analog Telephone Adapter - VoIP phone adapter
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Welltech Wellgate 2504 - 4 port FXS (Phone/Fax) Analog VoIP Gateway (
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Analog Telephone Adapter - Tech-FAQ
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Analog-Telefon-Adapter – Wikipedia
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Cisco ATA191 2 Port Analog Telephone Adapter - VoIP Supply
Analoge Endgeräte für die IP Telefonanlage
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VoIP Gateway Micro-Analog Telephone Adapter | SmartNode M-ATA