Cabletron Systems NBR-220 Installation Manual

Also see for NBR-220: Management guide

Contents

Chapter 3: InstallationPage 3-22NBR-SERIES Installation Guide3. Attach the fiber labeled 2 to the applicable transmit port labeled TX,on the module.4. At the other end of the fiber optic cable, attach the fiber labeled 1 tothe transmit port of the device.5. Attach the fiber labeled 2 to the receive port.6. Check that the LNK LED on the applicable module port is on. If theLED is not on, perform each of the following steps until it is:a. Check that the device at the other end of the link is on.b. Verify proper “crossover” of fiber strands between the applicableport on the module and the fiber optic device at the other end ofthe fiber optic link segment.c. Verify that the fiber connection meets the dB loss specificationsoutlined in Section C.1.2, Multimode Fiber Optic Network.If you still cannot establish link, contact Cabletron Systems TechnicalSupport.3.5.4 Connecting a Thin-Net Segment to an EPIM-CConnect a thin-net segment to an EPIM-C as follows:1. Set the Internal Termination Switch (see Figure 3-16), located to theright of the port and labeled TERM, to either of the followingpositions:• The ON position ( ) to internally terminate the thin-net segmentat the port.• The OFF position ( ) if you do not want the thin-net segment tointernally terminate at the port.2. If the Internal Termination switch is in the ON position, connect thethin-net segment directly to the BNC port.3. If the Internal Termination switch is in the OFF position, perform thefollowing steps:a. Attach a BNC tee-connector to the BNC port on the module.