Hi, When a new call comes, ser will forward the INVITE to the UA's location after lookup(). If the UA is not available, after a few retries, the call fails. Is there a knob to control how many retries? Currently it retries after 0.5s, 2.0s, 4.0s, 4.0s, 4.0s, 4.0s. During this 18.5s, there is no progress indication of the caller. It is too long for most users and most networks. Is it something we can control in a ser config? If not, which source file should we look into? Thanks, Richard