Hi, For those of you situated in Australia wanting to implement a Primary Rate Patton ISDN Gateway in your environment, it may be useful to know that the default template generated by 3CX only provides a config with a single inbound ring tone cadence (possibly an American or European format). This can be easily changed to give your external callers dialling in a standard Australian ring tone. The safest method is to export your current working configuration, editing this file then re-importing it, followed by a reboot - this ensures that you don't lose any additional customisation work that you may have done if it is an established system, otherwise simply update the wizard-generated config file prior to importing if you are building a new system. Simply replace the tone set lines with the following: profile ppp default profile call-progress-tone defaultDialtone play 1 1200 400 -13 440 -13 profile call-progress-tone defaultAlertingtone play 1 400 400 -13 440 -13 pause 2 200 play 3 400 400 -13 440 -13 pause 4 2000 profile call-progress-tone defaultBusytone play 1 400 425 -10 pause 2 400 profile call-progress-tone defaultReleasetone play 1 200 425 -10 pause 2 200 profile call-progress-tone defaultWaitingtone play 1 200 425 -10 pause 2 200 play 3 200 425 -10 pause 4 4400 profile tone-set default This process works and has been confirmed on several systems now. I would imagine that if changes are required for other countries that Patton support would be able to assist with the appropriate tone sets. I hope this helps you out if you come across this issue in the future.