[en] In heavy-ion induced reactions, fusion cross-sections at sub-barrier energies are significantly enhanced as compared to the predictions of one-dimensional barrier penetration model, which has been interpreted in terms of static deformations, couplings of in-elastic excitations, and non-fusion channels, especially the positive Q-value neutron transfer (PQNT) channels. This work aims to investigate the role of different couplings, PQNT channels, and to study the behaviour of EF at the deep sub-barrier energies, fusion cross-sections have been measured for ^35,37Cl+¹³⁰Te systems from 10 % below to 15 % above the barrier. This is particularly interesting because ³⁵Cl+¹³⁰Te system has six PQNT channels with respect to none in ³⁷Cl+¹³⁰Te system. Further, these systems are suitable to probe the shell effect as the target is common and projectiles are different in terms of the shell structure