Is it possible to delete more than 4 digits on the DDI settings of the OS7400 any version? I am recieving a CLI of 10 digits and only the last 4 show extension numbers. I need PBX to delete the first 6 digits. how do I achieve this on an PRI?

Yes it is possible.
Just set your delete count to however many you want.
I have a customer (OS7400 4.70 but was doing it on 4.46d) who is receiving 8 digits and deleting 5.

do not worry. i have figured out my mistake thanx