[ns] arrival rate in poisson process

hi guys, how to specify the arrival rate in Poisson process? please do help...

[ns] Arrival rate

I want to calculate the arrival rate (packet/second) for a node for the following topology. (Node 0) --- (Node 1) ftp source of 1000 packet size 10 Mbps bandwidth and 10 ms delay. I dont know if addinitional parameters are required. what is the exact formula to