In this article, we multiplex different services like B-ISDN, Ethernet, WDM and transmit through Optical Transport Network. We used different line codes for these services. 4B3T and 4B5b line codes were used for broadband ISDN/ATM, NRZ was used Gigabit Ethernet, Optical multiplexer to transmit a WDM channel. These services are then multiplexed and transmitted through Optical Transport Network. At the receiver section, these services are demultiplexed. © Research India Publications.