"Magdy H. Ibrahim" wrote:
> I am trying to connect my Cisco Router Cisco 3661 Router with ATM Interface
> Single mode Intermediate REACH to ISP router 7513 with ATM Interface Single
> mode LONG REACH via direct Fiber cable between the two sites ( Distance 1.5
> Km)
>
> Is this possible ? OR Should I have the two router with the same interface
> type IR or LR ??
Nope, should work in principle.
You might need a few dB attenuation added to avoid overloading the
receivers, though.
Assuming your path is a single fiber (Two connectors, no splices) your
path loss is roughly 3.5 dB. The transmitter power of the SMI interface
is -15 dBm, and with the max receive power of the SML receiver being -10
dBm, you're 1.5 dB short.
Same with the SML TX; that's -5 dBm (or more), and the SMI receiver may
not be able to handle a -8.5 dBm receive power.
You'll have to experiment a bit with that.
Regards,
Marco.
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