S
From the conversion I have completed, I conclude this.
1. To convert from 4 digit to 3 digit is issue the command
db selintra-work setprop global EXTLEN 3
and issue a COMMIT
2. Delete exsiting extensions and issue a COMMIT
3. Recreate them and issue a COMMIT.
4. Check and modify routes and Aliases if needed and issue a COMMIT.
5. Job complete ... Test to make sure thing work the desired way.
Thanks for your help S, David & Versa