Itarsi is a commercial stop for TN express and not a technical. Had it been a technical stop alone, I would have not got a reservation ticket from New Delhi to Itarsi in TN express on 11th Feb 2011.
Also, Itarsi being a Technical halt for Patna-Pune express, I could not get a ticket from Itarsi on this train, Instead, I had a reservation from Khandwa and took a General Class ticket from Itarsi to Khandwa on this train.