Quoting Pascal Bach pasci.bach@gmail.com:

Hello I'm currently searching for an UCP / EMI protocol implementation. I'm currently experimenting with twisted. Before I go further with my implementation work I would like to ask, if there are others interested in an UCP / EMI protocol implementation or in a generic SMS Protocol implementation in particular. Maybe somebody has already done some work on that?

Hello,

I used the library here: http://mjoc.sig.lt/projects/smpplib/ to implement a SMPP client with Twisted. It's not particularly awesome, but it works well enough for my needs. I could probably put it somewhere if you're interested.