Optics are just Optics when choosing the correct borescope, right? Lets face it- we are living in 2008 and nothing has changed much in this mature technology. As an example, go to your local camera store... look through the view finder on 4 or 5 of competing brands of SLR ...
First, you will need to know exactly what a Cisco GBIC is. Cisco GBICS are Gigabit Interface Converters that are hot-swappable input/output devices that plug into a Gigabit Ethernet slot or port. There are many interface types of Cisco GBICS including 1000BASE-T, 1000BASE-SX, ...