Avaya 9600 series IP deskphones do not support distinctive ringing. Only analog phones are affected by the user specific or system context Telephony tab configurations for Inside/Outside Call Sequence ring types. The rationale is that the IP phones have a graphical display which shows the caller name and number. Whereas, the analog phones do not have the graphical display. Therefore, the analog devices need an audible alert differentiator. The IP phones do not have this requirement due to their display of the caller's details.