Hi Brad,
first of all, welcome aboard ;)
Brad Chick wrote:
We are in the process of evaluating Kannel for our SMS needs. In the past, we have used ordinary SMTP messages sent via email to deliver messages. A big problem we run into is that certain carriers (e.g. Nextel, US Cellular) have threshold blockage rules, such that if we send too many messages in a small amount of time, they just block them.
I'm hoping that Kannel will eliminate the problem.
All of our messages are legitimate. We provide messaging services for major marathons and need to push out hundreds of thousands of messages during a 4-5 hour period.
the problem about US carriers accepting SMTP based injections to their MT service is known.
Kannel is NO SMTP based SMS gateway. SMTP (Mail) is actually mis-used by US carriers for the task in transporting a SMS message from as VASP (you) to the end-customer.
Kannel relies on "real" SMSC protocols, like SMPP, EMI/UCP or CIMD2. Which are all fearly well-known. Kannel abstracts those different "low-level" protocols to a higher abstraction layer, using a "high-level" protocol to the application side, the HTTP protocol.
So, if you want to push a huge ammount of MT SMS messages, you should be connected via EMI/UCP or SMPP connections to the SMSCs of the single operators or to messaging aggregators that leverage the routing for you.
For the US carriers, you should calcuate with a realistic throuput of about 20-30 msg/sec over one SMPP (ie.) connection.
Stipe
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