Problem to setting throughput value for SMSC group

hai,

I am in a position to control the throughput level of particular SMSC
connectivity. I found a way from kannel document suggests to use the
variable "throughput". Even though i am setting that value as 5, but it
delivering more than five to the SMSC. I tested this scenario with SMSC
simulators and i found the simulator received nearly 11 requests. 

Following is the smsc group configuration.

group = smsc
smsc-id = "VINOD-SMSC"
allowed-smsc-id = "VINOD-SMPP"
smsc = smpp
host = 192.0.400.00
port = 3333
smsc-username = "vinod"
smsc-password = "vinod"
system-type = "VMA"
address-range = ""
transceiver-mode = 1
interface-version = 34
source-addr-ton = 1
source-addr-npi = 1
dest-addr-ton = 1
dest-addr-npi = 1
keepalive = 25
log-level = 0
throughput=5
log-file = "/home/log/kannel/vinod-smsc.log"

Please guide me to sought out this issue.

Thanks in advance.

Regards,
Vinod Kumar