Does anyone have any suggestions on

[Guest_imported]

Does anyone have any suggestions on how to change an EPN connectivity from a T-1 to fiber? Now that I have fiber between my two buildings a get rid of the local loop, but I'm not sure how to make this work. I using multimode fiber with 9823A transceivers. I attached the transceivers but can not get the fiber link to come up. My guess is it probably has something to do with line coding or faming, it is currently set to b8zs and esf, the transceiver type is set to A. Also is it necessary to ds1-coverter on fiber?

 

[lopes1211]

You need to remove the DS1-C boards and the connector cables from the EI/SNI board amphenol connectors. The trancievers mount to the amphenol connectors behind the EI-SNI boards. Do a change fiber and set DS1-CONV to NO. Should be all you need. Also, make sure TX on 1 cabinet goes to RX on the other. -CL

 

[Guest_imported]

Thanks CL! Almost working now....I still have a minor problem with the link. It will work fine for a few minutes then the link with go down (fe) then come back up for a few minutes. I tried replacing the transceivers and fiber patch cord but that didn't seem to help. On the EPN I have the transceiver pluged into the expansion interface (TN570B), in the PPN the transceiver is plugged into the SNI (TN573B.) I have the RX to TX. What else can I check? When I test the fiber it fails test 777?

 

[lopes1211]

Have you verified both strands of the fiber with a fiber tester? I can't remember the exact specs but think anything less than about -30db loss should be fine (the number is probably a lot higher). Did you busy and release the fiber link? Also do a "reset firmware" on the SNI board location and the EI board location. Reverse the fiber pairs on 1 end to make sure you've got TX to RX. Also, do a "test board ? long" substitute the ? with the active switch node clock (should be 1e10, 11, or 12). One or more of these listed above should be the problem. -CL