Optical modules are divided into gigabit single-mode single-fiber modules and gigabit dual-fiber modules. The gigabit dual-fiber module has two interfaces, one for transmitting and one for receiving. Usually the interface is an LC interface, which is connected by two jumpers; The optical fiber bidi module has only one interface, and the transceiver is integrated. The SC interface and the LC interface are mostly used, which are connected by a single-mode jumper. The gigabit single-mode single-fiber optical module needs to be used in pairs.

1.25G Tx1490/Rx1310 10Km LC Transceiver The general model is SFP-GE-LX-SM1490-BIDI, Gigabit single-mode single-fiber optical modules are widely used in Gigabit switches, Fibre Channel, routers, servers and other network equipment. The advantage of the gigabit single-fiber bidirectional optical module compared with the gigabit dual-fiber optical module is that it can save optical fibers, because the use of the dual-fiber optical module requires two optical fibers for transmission, while the single-fiber bidirectional optical module only needs one for transmission.