MRV Communications MR2228-S2C User Manual

 17

To install an SFP transceiver, do the following: 
1. Consider network and cabling requirements to select an appropriate SFP 
transceiver type. 
2. Insert the transceiver with the optical connector facing outward and the slot 
connector facing down. Note that SFP transceivers are keyed so they can only be 
installed in one orientation. 
3. Slide the SFP transceiver into the slot until it clicks into place. 
Note: SFP transceivers are hot-swappable. The switch does not need to be 
powered off before installing or removing a transceiver. However, always first 
disconnect the network cable before removing a transceiver. 

Figure 3-6 shows how the stack cables are connected between switches in a 
stack.

 

The connection uses only Category 5 Ethernet cables. The switch supports 

a line- and ring-topology stacking configuration, or can be used stand alone. 
In line-topology stacking, there is a single stack cable connection between each 
switch that carries two-way communications across the stack. In ring-topology 
stacking, an extra cable is connected between the top and bottom switches 
forming a “ring” or “closed-loop.” The closed-loop cable provides a redundant path 
for the stack link, so if one link fails, stack communications can be maintained. 
Figure 3-6 illustrates a ring-topology stacking configuration. 
To connect up to eight switches in a stack, perform the following steps: 
1. Enable the stacking ports on each unit (i.e., the Stack button pushed out) 
Note: Pressing the Stack button during normal operation will cause the system to