I have been using a Dynalink RTA1046 for VFX for the last few days as our main phone line. While it was no problem at all adding the settings provided by XNET and to get the basics running,  there are a few issues we are experiencing. For example cell phones sometimes do not ring at all or the call only goes through after a number of rings. Also, when receiving phone calls it seems to happen that for the caller the hear the ring tone on our phone a longtime after I have already picked up the phone (to be answered by silence until the connections is established)
We are on XNET fusion

Are there any additional settings beyond the basic ones provided buy XNET that could be changed to improve these thing?

cheers