How to Adjust Ring time for Multiple Phones
To adjust the ring time on multiple extensions you could manually change the ring time per extension through the user interface, or alternatively, you can adjust the ring time within a profile, thereby effecting a change on multiple phones at once.
If you browse to 'Resources' → 'Profiles' and edit the appropriate record, or create a new one if necessary, you will be presented with the profile settings.
Modify the ring time as desired and save the changes to the profile:
After saving the updates in the profile you will need to power cycle/reboot your phones.
If you created a new profile, be sure to browse to 'Resources' → 'Phone Extensions' and update the profile for the extensions you wanted to adjust the ring time on:
After updating the extension(s) be sure to power cycle the phones.