In the case that you have a H323 or SIP PRI with an FXS port on the same router, yes - local bypass will take effect.
I would say this is a pretty low percentage of cases.
If either the PRI or port is controlled by SCCP or MGCP, or the FXS and outgoing PSTN are on different routers then it is the same. I would say this is the vast majority of configuration that I see.
We even see cases where we have to disable local bypass to get faxing to work on FXS, where it will only work with the DSPs involved.
I can understand frustration with faxing on things like the VG248, and especially the ATA, but VG224's are pretty good at faxing. The problems that you're more likely to work with are MGCP and SCCP related fax problem than any type of VG224 specific problem.
I had a similar issue when faxing to a fax server. All other faxes would go through fine except those destined for a remote fax server. I added the following commands on the sccp/vg224, which resolved our issue.
These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...