[Serusers] location available but not reachable

[Richard]

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