The call doesn't start until a SETUP is sent. An ARQ is an "admission request" which is just that. It establishes the caller's intention and the response from the GK, possibly after interacting with other GKs by way of LRQ, tells the endpoint if and how to complete the call. The measurement of post dial delay (PDD) is subjective. If I'm evaluating a route for termination of voice traffic I will consider the time between my SETUP being sent and the audible ring back being heard. This measures their performance for call setup. If the route uses gatekeepers we can consider seperately the transaction processesing time. When a customer is evaluating our PDD this transaction time will be part of the PDD from their perspective. -Vance ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ List: Openh323gk-users@lists.sourceforge.net Archive: http://sourceforge.net/mailarchive/forum.php?forum_id=8549 Homepage: http://www.gnugk.org/