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The iVAM WDM (wavelength-division multiplexer) module enables non-intrusive testing of any fiber path on a Remote Fiber Test System. This capability is ideal for testing active fibers in service. The WDM uses optical filter technology to multiplex a 1625 nm OTDR test signal onto the active fiber. At the opposite end of the fiber, a bandpass filter blocks the test signal before it reaches the receiver, so that the signal’s bit error rate (BER) is not affected. The WDM module is also available in a bypass configuration for testing optically amplified networks.
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