After gauge conversion, there was proposal to extend Brinda to Mysore & Tippu to Chennai, it didn't materialise
Brinda acts as connecting train , during MG era , between SBC - MYS, tippu used to wait for Brinda if it ( Brinda ) gets delayed & there used to be announcement at SBC, Mysore bound passengers please proceed to PF No... Tippu is waiting for you . Even now it is connecting train