Distinctive ringing
Contents
Distinctive ringtone
Hear whether an incoming call is internal or external.
A separate internal ringtone and external ringtone.
What you need to set on your device to make it work.
Yealink T4x
Go to Settings > Ring
Fill in for 1 Internal Ringer Text: alert-internal
Choose which ringtone should be played for Internal Ringer File.

Yealink T5x
Same as for the T4x but it looks slightly different.
Go to Settings > Ring
Fill in for 1 Internal Ringer Text: alert-internal
Choose which ringtone should be played for Internal Ringer File.

Gigaset N510
Configure this on the handset
Go to Menu - Settings - Audio Settings - Ringtones (Handset) - Melodies > Set the correct ringtone for internal and the SIP account in use
Grandstream GXP
Go to Accounts > Account 1 > Call Settings
Fill in alert-internal for Matching rule and choose which ringtone should be played next to it.

Cisco CP
Go to the Voice tab > Phone and go to the Ringtone section
Add the following to Ring 1: h=alert-internal;

Snom
Go to Setup > Preferences > Audio tab
Check if Alert Internal Text says: alert-internal, modify if necessary.
Choose which ringtone should be played for Alert Internal Ringer.
