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Fri, 03/04/2011 - 14:56 — munie

okumura-hata equation

hi..i'd like to know how do we get the fixed parameters of okumura-hata equation?as i'm doing my final year project on outdoor wireless over indoor wireless..tq

Tue, 07/27/2010 - 04:24 — arkahnz

GPRS and Dynamic IP incoming traffic. How do I Secure?

I work on a SCADA system that basically uses a GPRS network to acquire data from remote sites. The 3rd party telecom company providing GPRS allots dynamic IP addresses to the remote devices. We use a cisco router at the perimeter for managing incoming traffic from these remote sites. In such a scenario where IP addresses change over time, how do I secure my SCADA hosts at the control center? I basically want to make sure that only the traffic coming from the remote sites is allowed into the LAN network of the control center.
Thanks
Khaled