The Olson Technology Model OTOA-1000 provides 1dB though 7dB of step-variable attenuation (i.e. @ 1dB steps) for 1310nm signals via standard simplex 9/125 yellow nonplenum riser jacketed singlemode fiber cable. Results may vary with other wavelengths and types of fiber cable. The OTOA-1000 is the perfect companion to the Olson Technology, Inc. PremiseNode Models OTPN-x and MetroNode Models OTMN-x optical node/receiver product families, but is also designed to operate with optical node/receivers from most leading manufacturers.