First question reply:
- Actual release of Kannel (1.4.4) does not support smpp server out of the box.
- You can add it through the smppbox (more info), it is not officially supported right now but you can try it at your own risk
Second question reply (assuming you're talking about delivering SMS MT messages):
- Kannel is very performant, with some basic hardware config (1 Gb RAM + 2 Cores) you can easily get 100 SMS per second (MT).
- But dont forget to tune up your configuration, the default config wont let you go so far
- Tuning may include using sqlbox instead of smsbox, multiple sqlboxes for load balancing and even multiple bearerboxes for even more load balancing stuff
Second question reply (assuming you're talking about receiving SMS MO messages):
- When receiving a message Kannel can send it to a third party application through http, execute a script or insert the message in a database.
- Depending on the response time of the third party application, Kannel can deliver messages with an acceptable throughput
- There's a lot of config items to be tuned to get more throughput and better resource management
- Using multiple boxes (sqlbox or smsbox) is a must to take full advantage of parallel processing and load balancing

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