Folks,
Thanks for your response. It looks like 40 minutes will be enough to connect from ET 309 to ET 809 at ADD
I have already bought the tickets, so I'd like to avoid changing the tickets if possible.

I am thinking of not checking-in any luggage...does anybody know the carry-on restrictions on Ethiopian Airways (flying from NBO-ADD-JNB - Business class) ?
Will they allow a 9" X 9 " X 23" suitcase as carry-on ?

Thanks again,
Sanjay