Stand alone fiber optic converter is a small device with the fiber optic interface and copper cable interface and the power supply adaptor, for the fiber optic interface, SC type is the most commonly used, but there are also FC and ST types. For the Ethernet interface, it is usually one or several UTP cable ports.

There are also chassis type fiber optic converters, typical type is a 19-inch rack-mounted chassis, with 16 slots on it, so that it can fit 16 pieces of chassis type fiber optic media converters. For chassis type fiber media converters, they share the same power supply. They function as plug and play and thus is easy to manage.
fiber certification
There are also 14 Slot Media Converter Chassis, Its feature and application is similar as 16 slot chassis media converter, the difference is 14 slot chassis is used with stand alone media converters, while 16 slot chassis is used with card type media converters, and 16 slot chassis is bigger size.

Single mode to Multi mode Fiber Optic Media Converter
These Converters are simple and reliable devices for connecting multimode fiber traffic to single mode fiber devices and links. Use these bi-directional media converters individually to connect 100Base-FX or 1000Base-FXmultimode and single mode devices, or in pairs at each end of long-distance single mode fiber links. These Fiber Converters are the perfect solution dispersed networks where media conversion required between multimode segments separated by long distances.