Sir,
before the Gauge conversion, the below trains were operated
Coimbatore – Madurai passenger trains (1 train)
Palakkad – Rameshwaram passenger trains (2 trains)
Coimbatore – Rameshwaram overnight express (1 train)
Coimbatore...
more... – Pollachi passenger train (1 train)
Coimbatore – Rameshwaram overnight passenger train (1 train)
Coimbatore – Kollam passenger via Sengottai ( 1 train)
Palakkad/Coimbatore – Madurai passenger train (1 train)