Model 3540 - Telephone Network Emulator and Voiceband Analyzer
The Model 3540 is a two-channel DSP-based instrument that can be configured as a Central Office (FXS) on one or both channels, and/or as Telephony Equipment (FXO) on one or both channels. Central Office Simulation allows the Model 3540 to generate DC Voltage plus a wide range of country-specific SMS, Caller ID, FSK, Ringing, Call Progress, Noise, and Tone signals. Telephony Equipment Simulation permits the Model 3540 to function as Customer Premise Equipment (CPE) such as a telephone or a modem.
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Rochelle Communications, Inc.
P.O. Box 141189
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Model 3520 - Modem-On-Hold Tester Rochelle Communications, Inc. Contact Info Send To Colleague 
The Rochelle Model 3520 Modem-On-Hold Tester is a stand-alone instrument for development and testing of V.92 Modems and Integrated Access Devices. The Model 3520 features user-friendly software that allows the user to set CO line parameters, ringing voltage and frequency, and signal levels. The Model 3520 includes selectable 6, 9, and 15Kft artific ...more
