Module development / fixes

I am looking for some custom module developments to fix a couple of existing bugs, as well as a couple of needed enhancements:

  1. Fix PHP negative number issue in Extension Settings module.

  2. Add per extension call blocking (as one user should not be able to block calls to everyone else). Would be great if the user portal allowed for adding/removing too.

  3. Add offline forwarding (like call forward all, but only applies to when device not online/connected). This must be editable via the admin and user portals.

  4. Fix outbound calls not being displayed in user portal call monitor.

If anyone is available, please let me know.