[SR-Users] TM clarifications

Hello, I am using Kamailio 1.5.4. I read RFC3261 section 17 and the TM doc, I had a few questions : Does t_relay() manage both the client and server transactions for the packet being forwarded ? Meaning it would absorb retransmissions it receives and would retransmit the relayed message when needed ? Do I need to call t_release() when I call t_relay () ? Where would I use t_checktrans(), t_release() and t_newtran() ? My understanding is that if I want to receive a packet and process it locally without forwarding it, I should use t_newtran(). This would be good for things such as PUBLISH, PRESENCE and REGISTER ( even though it's not a good idea ). So when do I release the transaction ? In the reply route ? In the same run as I call t_newtran() ? Does t_checktrans() absorb retransmissions that were started with t_relay and t_newtran? If you have any material that I could read that would help me better understand the TM module, please say so. Thanks, David