Fax Analysis and Simulation over IP, TDM, & PSTN from GL Communications, Inc.
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Fax Transmission Analyzer Option
Amazon.com: USB 56K Voice Fax Data External V.90 V.92 Modem With Dual Ports, Compatible With Windows 98SE/2000/ME/XP/Vista/Win 7 and Support Auto-Dial, Tone and Pulse Dialing, Auto Answer, Auto Retrain (Black Color) :