Question : Measuring Uplink and Downlink speed in GPRS/dial up connections simultaneously

I would like to hook up 3 different GPRS connections so that I open 3 different ftp connections, one on each connection. I can do this without any problems using any regular ftp program, anything I upload or download will always go through the last connection I opened. Is there anything I configure in windows so that if I open an ftp and bind the ftp to an IP that all trafic to and from that ftp will travel through a specific address? Notice that I have to measure uplink and downlink speeds, so a load balancing solution will not solve my problem.

Answer : Measuring Uplink and Downlink speed in GPRS/dial up connections simultaneously

just do it by changing your routing table, for example:

FTP1 110.100.100.100 for local GPRS connection C1 on 10.10.10.10
FTP2 120.100.100.100 for local GPRS connection C1 on 10.10.20.10
FTP3 130.100.100.100 for local GPRS connection C1 on 10.10.30.10

your current routing table should be like this:

Network Destination        Netmask          Gateway             Interface         Metric
          0.0.0.0                 0.0.0.0         10.10.10.10         10.10.10.10         30
          0.0.0.0                 0.0.0.0         10.10.20.10         10.10.20.10         20
          0.0.0.0                 0.0.0.0         10.10.30.10         10.10.30.10         10

then make your routing table like the followings:

Network Destination        Netmask          Gateway             Interface         Metric
  110.100.100.100        255.255.0.0     10.10.10.10         10.10.10.10         1
  120.100.100.100        255.255.0.0     10.10.20.10         10.10.20.10         1
  130.100.100.100        255.255.0.0     10.10.30.10         10.10.30.10         1
          0.0.0.0                 0.0.0.0         10.10.30.10         10.10.30.10         10

to be briefly, i assume that you know how to use "route add" command to update routing table in command prompt window of windows and understand the related routing concepts, but if you have any thing not clear or further questions, just let me know.

regards,
bbao