AT-GS900MX Series Installation Guide for VCStack
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Stacking Slots and Transceivers
The AT-GS900MX Series Switches come with two stacking slots. The
slots are labeled “S1” and “S2”. For stacking, the slots may only be used
with the VCStack feature and with the AT-SP10TW transceiver.
The stacking transceiver is shown in Figure 15. It has two SFP+
transceiver-style connectors and one meter of twinax cable.
Figure 15. Stacking Transceiver
Stacking transceivers must be purchased separately.