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Cisco Linksys Sipura SPA-2100 VoiP Telephone Adapter
Voip Adapter Voip Gateway Internet Phone 2 Ports Adapter with SIP RJ45 Cable for Linksys PAP2T, ATA Telephone Adapter Voip Phone Adapter with 2 Ports for Voice-Over-IP,Support DHCP SIP V2 Protocol :
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Linksys PAP2T-NA VoIP Phone Adapter Instructions - YouTube