Is there a Linux utility to send/receive a fixed amount of traffic all the time?

Question

linux

Actually, it is necessary to occupy the channel with 3-4 kilobytes per second so that the modem is not reset to umts, etc.

Answer 1

man ping

-s packetsize
              Specifies  the  number  of data bytes to be sent.  The default is 56, which
              translates into 64 ICMP data bytes when combined with the 8 bytes  of  ICMP
              header data.

Answer 2

wget to cron

Answer 3

iperf, any band, any type of traffic, any kind of reports