You can board trains from Chennai, Salem, Madurai, and Coimbatore to reach Jammu Tawi station. Here are the trains you can board:
1. Chennai - Andaman Express
2. Madurai - TEN SVDK Express
3. Salem - Himsagar Express, TEN SVDK Express and Navyug Express
4. Coimbatore - Himsagar Express and Navyug Express