[Serusers] More detailed explanation of t_newtran needed.

I am trying to understand how tm module works. I found in http://www.iptel.org/ser/doc/prerelease/x545.html--->Stateful User Agent Server: ______________________________________________ t_newtran shields subsequent code from retransmissions. It returns success and continues when a new request arrived. It exits current route block immediately on receipt of a retransmissions. ----------------------------------------------- I found in the README included in tm module: _______________________________________________ Name: t_newtran Params: 0 Desc: creates a new transaction, returns a negative value on error; this is the only way a script can add a new transaction in an atomic way; typically, it is used to deploy a UAS ----------------------------------------------- I think the two explanations above are inconsistent. I am quite confused. Take the scripts below for example: _______________________________ if ( !t_newtran()) { sl_reply_error(); break; }; # the following log will be only printed on receipt of # a new message; retranmissions are absorbed by t_newtran log(1, "New Transaction Arrived\n"); if (uri=~"a@") { if (!t_reply("409", "Bizzar Error")) { sl_reply_error(); }; } else { if (!t_reply("699", "I don't want to chat with you")) { sl_reply_error(); }; }; ------------------------------- My understanding is: If t_newtran() returns successfully, the scripts will not execute forward until a new message rather than retransmission of the original message is received. Am I right? If wrong, how does it work actually? Thanks! Younger Wang