What is neg 30 "error on the optical fiber

Hi all

at our office, we have telco tec came and it has tested the demarc to our device fiber and reported this

30 "error neg, he told us to check our equipment.

My question is what is neg 30 "error. He told us that there is extremely low loss.

When we do the ping of our device on teclo circuit, we see packet loss.

Thank you

Mahesh

You don't have not provided us any information about the network or hardware you use or where this neg. 30 error is reported.

My guess is the technician tested at the level of light at your equipment and measured - 30dBmv.  Most of the optical transceivers, GBIC/SFP, have a minimum level of optical input of-17 and - 29dBmv, according to the type (SX, LX, ZX, WDM).  So,-30dB receive level would cause errors on your link.

Check the routing of the fiber to see if there are sharp turns or the kinks.  Additionally, make sure that the connectors are clean.

Tell us what you find.

Tom

Tags: Cisco Network

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