Allied Telesis AT-S79 - Ports 15 and 16 on the AT-GS950;16 Switch and Ports 23 and 24 on the AT-GS950;24 Switch

AT-S79 Management Software User’s Guide
23
Ports 15 and 16 on the AT-GS950/16 Switch and Ports 23 and 24 on the
AT-GS950/24 Switch
This section applies to the twisted pair and optional SFP ports 15 and 16
on the AT-GS950/16 switch and ports 23 and 24 on the AT-GS950/24
switch. Note the following when configuring these ports:
 The twisted pair ports are, by default, the active ports.
 An optional SFP port becomes active when it establishes a link with an
end node, at which point the corresponding twisted pair port changes
to the redundant state.
 A twisted pair port and its corresponding optional SFP port share the
same configuration settings, including port settings and VLAN
assignments. When an SFP port establishes a link with an end node, it
operates with the same settings as its corresponding twisted pair port.