This page covers the transmission distances when using fiber on XD612, XD614, XD641, and XD642.
The choice of fiber used with the ADDERLink XD modules has a considerable effect on the distance over which operation can take place. Using multi-mode fiber you can achieve distances up to 400m (1,312 feet); whereas, by using single-mode fiber (and accompanying SFP+ modules), the achievable maximum distance is increased to 4km (2.5miles):
| Distance | Fiber type | Fiber color code | SFP+module |
| 70m | OM1 (TIA-492AAAA) | Orange | SFP+-MM-LC-10G |
| 150m | OM2 (TIA-492AAAB) | Orange | SFP+-MM-LC-10G |
| 380m | OM3 (TIA-492AAAC) | Aqua | SFP+-MM-LC-10G |
| 400m | OM4 (TIA-492AAAC) | Aqua | SFP+-MM-LC-10G |
| 4km | OS1 (TIA-492C000) | Yellow | SFP+-SM-LC-10G |
| OS2 (TIA-492E000) | Yellow | SFP+-SM-LC-10G |
Note
Although XD6XX extenders are not locked to specific SFPs, it is recommended that Adder supplied SFPs are used: (SFP+-MM-LC-10G or SFP+-SM-LC-10G) to maintain a high level of confidence in the fiber optic link.