At 12:16 p.m. 16/09/2010, Terry Wilson wrote:
I'm wondering what sort of equipment people are
using as their
physical connection to the network; we are having some issues
getting some cheap and cheerful media converters to work that are
connected at 100mb to a Catalyst 2960, their current thoughts are
that the TX power is too high (28db measured at South Dunedin, we
are Central) and we may need to look at putting an attenuator on to
drop it down to the 8db they see on their other customer
links. Before we go out and source an SFP to suit one of the other
switches I want to get an idea of what other people are using.
In a sort of related way, if you need an attenuator, buy a pencil.
Wrap A02 fiber around it and its roughly 3db per turn from memory.
(may be 1db, but you can soon measure it.) Tape patch cord in place.
I would doubt you'd need it. The main issues I recall are too much
loss with E1 modems and video modems - both analog.
So always carry a pencil.