Exponentially increasing network traffic requires hundreds of terabits per second data transmission rate, consuming around 9% of the electricity worldwide. Massive parallel optical links demanded to support the data transmission capacity, but not favorable in terms of scalability, energy consumption, complexity, cost, and size. A single laser source followed with semiconductor optical amplifier based optical frequency comb enabling data transmission of 6.78 Tbps over an 80 km single-mode fiber (SMF) is a possible solution to reduce the energy consumption, complexity, cost, and area. The data transmission over 80 km SMF also makes it suitable for inter-data center communication. So, in the proposed work, the evenly spaced and phase-coherent 113 frequency lines individually modulated using differential quadrature phase-shift keying at the bit rate of 30 Gb/s and then multiplex using polarization and wavelength multiplexing technique to transmit signal over 94.4 km (80 km single core and single mode fiber and 14.4 km dispersion compensating fiber). The proposed work has also carried out the detailed analysis of optical frequency comb parameters required for its application in telecommunication. Following the procedure mentioned earlier, a signal at the minimum quality factor of 23 dB with total transmission rate of 6.78 THz for 226 users is achieved at the receiving end, making the work suitable for telecommunication and inter-data-center communication applications.