Allied Telesis AT-GS950/10PS - Manual (Page 23)

AT-GS950/10PS, AT-GS950/16PS, and AT-GS950/48PS Switches Installation Guide
23
Combo Ports
The AT-GS950/8 and AT-GS950/48PS Switches have two combo ports,
and the AT-GS950/16PS Switch has four combo ports. Each combo port
consists of one 10/100/1000Base-T twisted pair port and one slot for an
optional 100Base-FX or 1000Base-SX/LX SFP transceiver. The twisted
pair ports are identified with the letter “R” for “Redundant” on the front
faceplates of the units. The ports and slots are listed in Table 2.
The combo ports have the guidelines listed here:

Only one port in a pair, either the twisted pair port or a
corresponding SFP module, can be active at a time.

The twisted pair port is the active port when its SFP slot is empty,
or when an SFP module is installed but has not established a link
to an end node.

The twisted pair port automatically changes to the redundant status
mode when an SFP module establishes a link with an end node.

A twisted pair port automatically transitions back to the active
status when the link is lost on the SFP module.

In nearly all cases, a twisted pair port and an SFP module share
the same configuration settings, including port settings, VLAN
assignments, access control lists, and spanning tree.

An exception to the shared settings is port speed. If you disable
Auto-Negotiation on a twisted pair port and set the speed and
duplex mode manually, the speed reverts to Auto-Negotiation
when an SFP module establishes a link with an end node.
Table 2. Combo Ports
Switch Twisted Pair Port SFP Slot
AT-GS950/10PS
9R 9
10R 10
AT-GS950/16PS
15R 15
16R 16
AT-GS950/48PS
45R 45
46R 46
47R 47
48R 48