Chapter 3: Testing and Troubleshooting
5.Disconnect the jumpers from the barrel connector.
6.Using the jumper, attach the optical power meter to one end of one strand of the link segment.
7.Using the other jumper, attach the other end of the same strand to the optical source unit.
8.Note the reading on the optical power meter. This is your test level.
9.Subtract the reference level found in Step 4 from the test level to find your dB loss for the fiber optic link segment, i.e.,
dB loss = Test Level - Reference Level.
10.Verify that the reading on the receive unit falls within the range indicated by the Receive Sensitivity and Maximum Receive Input Power specifications listed in the Fiber Optic Interface section of Appendix A.
11.Repeat Steps 6 through 10 for the other strand in the link segment.
If the fiber optic link segment does not meet the specifications, it may be contaminated with dust, dirt, or other contaminants. Try cleaning the connection at each end of the cable with denatured alcohol, using a soft, clean, lint free cloth, then repeat the test.
If this does not work, contact Cabletron Systems technical support.
3.1.2Link Test
To verify the physical link between your devices, check the LNK LEDs on your FOMIM and receiving device for the applicable port. If the LEDs are lit, the proper connection has been made.
If the LEDs are not lit, perform the following procedure, using a Cabletron Systems
1.Check that power is being supplied to both the FOMIM in the MMAC chassis and the device at the other end of the link.
2.Reverse the fiber optic cable ends at either the applicable port on the module or at the device.
3.Check if the LEDs are lit.
FOMIM User’s Guide |
