Fastest method to insert a million MT messages to Kannel

[Cliff Court]

Hi All

I have set up Kannel with bearerbox and smsbox, which is working and I 
am writing dlr's to a mysql db.

Currently I am submitting messages using a sendsms GET or xml-based 
POST, as per the Kannel documentation. However, using individual http 
GET or POSTs for each message is relatively slow when needing to send a 
large volume of messages. Let's assume I have a 100 msgs/sec connection 
to an external SMSC using SMPP from bearerbox, which will take ~3 hours 
to send 1 million MT messages.

So my question is what is the fastest method to submit messages to 
bearerbox to send a million MT messages?

I have seen that SQLbox is available and that one can insert messages 
into the send_sms table for faster submission, but I'm wondering what is 
the fastest method of submission to bearerbox?

Thanks
Cliff