The Bihar government has decided to install 'Towers of the Harmonious Call Blocking System (T-HCBS)' in all 15 prisons of the state to prevent unauthorised communications from jail premises.

The T-HCBS will be installed at Central Jail (Beur, Patna), Central Jail (Buxar), Central Jail (Motohari), Shahid Khudiram Bose Central Jail (Muzaffarpur), Central Jail (Purnea), Shahid Jubba Sahni Central Jail (Bhagalpur), Special Central Jail (Bhagalpur), Central Jail (Gaya), District Jail (Chhapra), District Jail (Darbhanga), District Jail (Saharsha), District Jail (Munger)., District Jail (Phulwarisharif), Sub- Jail (Danapur) and Sub-Jail (Patna City).